A chain is a unit of length equal to 66 feet or 22 yards. This is a statute measure in the United Kingdom. One link is 100th part of a chain, which is 7.92 inches (20.1 cm). The chain and link became standard surveyors' units of length and crossed to the colonies from the United Kingdom. The chain is the unit of linear measurement for the survey of the public lands as prescribed by law. In Australia most building lots in the past were a quarter of an acre, measuring one chain by two and a half chains. Also street frontages, roads, laneways. The chain also survives as the length of a cricket pitch, being the distance between the stumps. Surveyors and residents of the Kiewa Valley used the Steel Band Surveyors Chain to measure distances when developing the land.Surveyors' steel band measuring tape, known as a 'standard band', or a 'steel band chain'.This chain consists of a long narrow strip of steel of uniform width of 3 mm and thickness of 0.3 to 0.6 mm. The chain itself is between 20 m and 30 m long.surveyors, surveyors chain, measurement of distance

Used to instruct the serviceman how to read and question learnt material about map reading. The map as a plan, as a reference point, a measurement of distance, a relief and direction in any situation Paper Booklet with 24 pages that have faded to a beige colour A5 in size ReservedFront page has the name of the booklet with added date 1943. Crown Copyright. Prepared under the direction of the Imperial General Staff The War Office August 1943 22307booklet, map instruction, 1943

The booklet outlines in detail all aspects of Orthophoto mapping including current equipment, reproduction techniques and the role of orthophoto maps as produced by the Royal Australian Survey Corps. An orthophoto or orthophoto map is a highly accurate geometrically corrected aerial or satellite image where distortions from camera tilt and terrain relief have been removed, resulting in a uniform scale. It therefore acts as a "map accurate" photograph allowing for precise measurements of distances and areas. A4 size booklet of 23 numbered pagesroyal australian survey corps, fortuna, army survey regiment, rasvy, asr

Gunter's chain (also known as Gunter’s measurement) is a distance measuring device used for surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter (1581–1626). It enabled plots of land to be accurately surveyed and plotted, for legal and commercial purposes. The provenance of this particular Gunter Chain is unknown but it is believed to be used either by the City of Bendigo / Sandhurst or the Lands Department locally when measuring and laying out plots and streets locally. A 66-foot (20.1 m) chain divided into 100 links, marked off into groups of 10 by brass rings or tags. Each link is 7.92 inches (201 mm) long. A quarter chain, or 25 links, measures 16 feet 6 inches (5.03 m) also called a a rod (or pole) measure. Ten chains measure a furlong and 80 chains measure a statute mile. city of greater bendigo surveying

This is a set of five photographs of CAPT James ‘Jim’ Leslie Stedman in the field demonstrating the setup of prisms used as electric distance measurement (EDM) receiver reflectors for tellurometer equipment and the sighting of a large surveyor’s light. This equipment was deployed in establishing mapping and geodetic control operations. The photos were most likely taken in the late 1950s or early 1960s. The tellurometers of this era were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. Jim Stedman later reached the rank of Colonel, was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment. See item 6180.16P, photos .14) to .16) for more information and photos of Jim Stedman’s EDM demonstration. This is a set of five photographs of a surveyor in the field demonstrating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) to .2) - Photo, black & white, c1960s, CAPT Jim Stedman demonstrating the sighting of a large surveyor’s light. .3) to .5) – Photo, black & white, c1960s, CAPT Jim Stedman demonstrating EDM prism equipment. .1P to .5P on back – CAPT Stedman EDM Eqpt.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

The author, Bennett H. Brough was an associate of theRoyal School of Mines, a member of the COuncil of the Institution of Mining Engineers, a fellow of the geological society and of the Institute of Chemistry, a member of the Mining Institute of Cornwall, and a former instructor of mine-surveying at the Royal School of MinesRed had covered book 372 pages - part of Griffin's Mining Series. Contents include general explanatinos of surveying, an historical sketch, mineral deposits, mining terms, measures of length, measurement distances, the chain, rods, steel bands, measuring wheel, Miner's Dial, Magnetic needle, Fixed needle, German Dial, theodolite, traversing underground. Surface-surveys. plotting the survey, calculation of area, leveling, Telescope, Setting out, Mine-Surveying Problems, Mine Plans, Photographic Surveying, examination Surveying. Illustrations include: Whitelaw's Dial (Fig 22), Theodolite of the American Type with Hoffman tripod head, (fig 37a)mining, surveying, miner's dial, chain, survey, theodolite, scientific instruments

trilateration with the tellurometer by GRL Rimington L.S MIS (Aust) Chief Topographic Surveyor, Department of National Development, Australia. This paper was delivered to the Institute of Surveyors Conference, Brisbane 26 May 1958. This paper is a summary of Electronic distance measurements carried out in 1957 in Central Australia by officers of the division of National Mapping, Department of National Development. Trilateration is a surveying Technique that uses measurements of the sides of triangles to determine relative position.A 11 page foolscap size stapled paper report. Two holed punched with dis-coloured pages due to age.royal australian survey corps, rasvy, fortuna, army survey regiment, army svy regt, asr, division of national mapping, surveying

Hipchains are a reliable tool for precise long distance measurement, particularly with irregular boundaries, in rough terrain or thick scrub To use, simply tie the cotton thread to a fixed object at your starting point, zero the counter, and start walking. As you move, the thread extends, turning the counter. The instrument attaches to your belt, keeping the thread taut and accurate. Once you reach your endpoint, break the thread and continue.HipChain Distance Measurerforest measurement, surveying

This is a photograph of Army Survey Regiment personnel undertaking surveying measurements during a search for the ‘Mahogany Ship’ Warrnambool, VIC on 3rd September1985. CPL Mark Lander and SGT Don Williams were taking electronic distance measurements using an MRA-301 tellurometer. To measure the distance, personnel at another site operating another MRA-301 tellurometer would have exchanged the signal emission. A ‘Hilga Watts’ light appears in the background and a barometer in the foreground.This is a photograph of Army Survey Regiment personnel undertaking surveying measurements during a search for the ‘Mahogany Ship’ Warrnambool, VIC on 3rd September1985. The photograph was printed on photographic paper and is part of the Army Survey Regiment’s Collection. The photograph was scanned at 300 dpi. L to R: CPL Mark Lander, SGT Don Williams‘R.S. 3/9/1985 CPL Mark Lander, SGT Don Williams PIC BY COURTESY OF THE WARRNAMBOOL STANDARD’ annotated on back of photoroyal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

Compass, divider, and caliper are basically instruments that have two legs pivoted to each other at the top and are concerned with small-distance measurement or transfer. The compass and divider have straight legs; the caliper has curved legs. Dividers and Calipers were known to both the Greeks and Romans, though the caliper was uncommon. A divider with a circular sector, or wing, connecting the two legs was sketched in 1245, its modern counterpart is the wing divider with a thumbscrew clamp and screw for fine adjustment. Or the marine dividers used to measure the distance a vessel has travelled by transferring the vessels distance from a map with the divider and transferring that measurement to a marine ruler to mathematical calculate the distance.Item is believed to be a replica/ copy of a 19th century map calipers used in marine navigation to determine distance travelled. Item was probably purchased between 1972-1975 to add to the marine displays at Flagstaff Hill.Stainless steel dividers used in navigation charts. Top half is alloy plated. "W & HC" and "Made in England".flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, stainless steel dividers, steel dividers, dividers

This is a set of 1photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement equipment. They were probably employed in establishing mapping and geodetic control operations or the surveyors may have been in training. The photos were most likely taken in the 1950s and 1960s. Photos .1P to .6P feature personnel setting up geodetic survey chaining equipment to measure distances. The surveyor in Photo .5P is LTCOL Howard Angus Johnson MBE who served from 1936 to 1954. The RA Svy surveyor in photos .7P to .12P were using a theodolite to take angular measurements. They were usually supported by an observer who recording their readings on a booking form. The surveyor in Photo .10P and .11P is LTCOL Jorge Gruszka, who served from 1955 to 1985. He was CO of the Army Survey Regiment from 1982 to 1985. The surveyor in photo .13P is cutting an identification blaze on a tree using a hammer and chisel. The tellurometer in Photos .14P to .16P was a MRA1 microwave Electronic Distance Measuring instrument (EDM) introduced in 1958. It and later models were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. The surveyor with the slouch hat is Colonel James ‘Jim’ Leslie Stedman, who served from 1941 to 1978. He was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment.This is a set of 17 photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) - Photo, black & white, c1950s, unidentified personnel using geodetic survey chaining equipment. .2) to .4) - Photo, black & white, c1950s, geodetic survey chaining equipment. .5) – Photo, black & white, c1950s, Jim Stedman using geodetic survey chaining equipment to measure distances. .6) - Photo, black & white, c1950s, Unidentified personnel geodetic survey chaining equipment. .7) – Photo, black & white, mounted on card, c1950s. Unidentified surveyor undertaking observations on a coral reef using a theodolite. .8) – Photo, black & white, c1950, unidentified surveyor undertaking observations with a Tavistock theodolite. .9) – Photo, black & white, mounted on green card, c1950s. Unidentified surveyor undertaking observations using a plane table. .10) – Photo, black & white, c1955, Jorge Gruszka undertaking observations with a theodolite. 7/55 Basic Survey Course Balcombe. .11) – Photo, black & white, c1950s, Jorge Gruszka undertaking observations with a theodolite. .12) – Photo, black & white, c1946-1948, unidentified surveyor undertaking observations with a theodolite to gain control for the mapping of the Snowy Mountain Diversion Scheme. .13) – Photo, black & white, c1950s, unidentified surveyor cutting a blaze in a tree. .14) and .15) – Photo, black & white, c1960s, Jim Stedman demonstrating EDM equipment. .16) – Photo, black & white, c1960s, L to R: Jim Stedman (probably) and unidentified surveyor demonstrating EDM equipment. .17) – Photo, black & white, 1956, Operation Cutlass - Surveyors SPR W. Crane and J.A. Campbell undertaking observations with a theodolite in extreme conditions..1P on back - First Order Chaining Equipment .2P on back - First Order Chaining Equipment .3P on back - Full catenary 1800 – 1960 replaced by EDM .4P on back - First Order Chaining Equipment .5P on back - H.A. Johnson, Benambra baseline? 1st Order Chaining .6P on back - Chaining .7P on front - Difficult observing conditions especially when the tide is in. The station is sighted (sic) on a coral reef. .8P on back - Tavistock. .10P on back of duplicate in Photo Folder 14 – George (sic) Gruszka 7/55 Basic Survey Course Balcomme (sic) 1955/56 .14P and .15P on back - Jim Stedman demonstrating early EDM equipment.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

An Octant is a doubly reflecting navigation instrument used primarily by sailors to measure the angular distance between two visible objects and was a forerunner of the sextant. The name comes from the Latin octo, or “one-eighth of a circle,” for the Octant’s arc which spans 45°, or one-eighth of a circle. The primary use of an Octant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation. The estimation of this angle is known as sighting or shooting the object, or taking a sight. The angle, and the time when it was measured, can be used to calculate a position line on a nautical chart (latitude), for example, sighting the Sun at noon or Polaris at night (in the Northern Hemisphere) gives an angle by which the latitude can then be estimated. Sighting the height of a landmark on land can also give a measure of distance. History: The principle of the Octant as an instrument to measure ones latitude was first implemented around 1742-present but was superseded by the improvement of the octant to a sextant, a very similar instrument, better made and able to measure bigger angles 120°, allowing the measurement of Luna distances to give longitude when used with an accurate chronometer. The sextant started to appear around 1730 and had been attributed to by John Hadley (1682–1744) and Thomas Godfrey (1704–1749), but reference to the sextant was also found later in the unpublished writings of Isaac Newton (1643–1727). Earlier links can be found to Bartholomew Gosnold (1571–1607) indicating that the use of a Sextant for nautical navigation predates Hadley's implementation. In 1922, the sextant was modified for aeronautical navigation by Portuguese navigator and naval officer Gago Coutinho. Henry Hemsley was a lesser-known instrument maker and optician working in London in the late 17th and early 18th century. However, it should be noted that there were two Henry Hemsley opticians and instrument makers around this period. (Henry Hemsley 1, 1786-89, who had premises at 85 Fleet St London and Henry Hemsley 2, 1828-56), whose workshop was at 135-138 Radcliff Highway London. Therefore, based on the inscribed workshop address Henry Hemsley 2 is responsible for making this example.The octant is representative of its type and although not fully complete it demonstrates how 18th and 19th-century mariners determined their latitude on a chart to navigate their way across the world's oceans in the 18th and 19th century. It also demonstrates the skill and workmanship of the early instrument makers that operated from London at this time and provided most of the navigational instrumentation use by commercial and military navies of the time.Octant, ebony wooden frame and handle. Scale is missing from recess in frame. "H. Hemsley 135-138 Ratliff Highway, London", no box"H. Hemsley 135-138 Ratcliff Highway, London"flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, navigation, navigational instrument, instrument used for navigation, sextant, henry hemsley, instrument maker, london, octant

This is a set of 16 photograph of the Royal Australian Survey Corps’ Johnson Ground Elevation Meter (JGEM) Survey Vehicle taken at the Army Survey Regiment, Fortuna, Bendigo. The JGEM vehicle was extensively used by RA Svy within Australia from the late 1960s. A limited number of Ground Elevation Meter (GEM) station wagon type vehicles were manufactured by General Motors Corporation (GMC) in the USA for the United States Geological Survey, Canada’s mapping agencies, RA Svy and National Mapping (Natmap). The GEM was a four-wheel drive, four-wheel steer vehicle. Four-wheel steering was necessary to avoid systematic errors caused by non-tracking of front and rear wheels on conventionally steered vehicles. The manufacturer substituted the rear axle with a front axle and connected them to form the four-wheel steering mechanism. The two Australian GEM vehicles, referred to as Johnson GEMs (JGEMs) were converted into right-hand drive. After delivery in 1964, acceptance Natmap and RA Svy testing and operator training was undertaken at the Army's School of Military Survey located at Balcombe, Victoria. A small fifth wheel was mounted on a cantilever arm suspension midway between the front and rear wheels on the right side of the vehicle. It was lowered to and raised from its operating position by use of a constant pressure air cylinder. A telescopic bar, suspended between the front and rear axles, provided the reference datum for the angle measurement. The wheel provided the velocity or distance signal through a pulse generator system. A sensitive pendulum mounted on this bar provided the angle measurement for each minute distance traversed. The JGEM contained electromechanical instruments used to determine relative elevations, by trigonometric principles, along a traversed path. These relative elevations were obtained through apparatus which measures the instantaneous angle of inclination of the road and the instantaneous velocity of the meter along such a path. Road routes over which the JGEM operated were planned so that each started and ended as near as practicable to an existing point of known elevation (formally referred to as a level traverse bench mark). The difference in height from the bench mark and the road surface alongside the JGEM’s fifth wheel was measured with a level and staff. Along each route, mapping control photo reference points where new elevation values were required were identified on aerial photographs. Under favourable conditions it was possible to survey as much as 160km in an ordinary working day. The first of RA Svy’s JGEM operations was undertaken in 1:250,000 scale map areas of Queensland. CPL John Hook was the JGEM’s main operator in the early 1970s undertaking operations covering 1:250,000 scale map blocks over northern Victoria and central NSW, each requiring 36 points (9 runs of photography and 4 points across. SPR Lyn Thompson and SPR Bob McDonagh teamed with CPL Hook on some of these JGEM operations. When RA Svy was integrated into the Royal Australian Engineers in 1996, the JGEM vehicle with the Survey Corps collection was donated to its museum. It is believed to be the last of the original manufactured fleet in existence. The JGEM has undergone extensive refurbishment to achieve roadworthiness and is currently housed at The Australian Army Museum of Military Engineering, Hoslworthy Barracks, NSW. It can be viewed by making an appointment with the museum’s curator.This is a set of 16 photograph of the Royal Australian Survey Corps’ Johnson Ground Elevation Meter (JGEM) Survey Vehicle taken at the Army Survey Regiment, Fortuna, Bendigo. The photographs were on 35mm slide film and were scanned at 96 dpi. They are part of the Army Survey Regiment’s Collection. .1) - Photo, colour, c1960s, Johnson Ground Elevation Meter (JGEM) Survey Vehicle .2) - Photo, colour, c1960s, JGEM instrumentation, on-board computer. .3) - Photo, colour, c1960s, JGEM instrumentation. .4) - Photo, colour, c1960s, JGEM instrumentation, on-board computer. .5) - Photo, colour, c1960s, JGEM tyre pressure controller .6) - Photo, colour, c1960s, JGEM rear doors, SGT Geoff Briggs. .7) - Photo, colour, c1960s, JGEM 5th wheel distance/angle measurement device in lowered position, SGT Geoff Briggs. .8) - Photo, colour, c1960s, JGEM 5th wheel distance/angle measurement device in lowered position. .9) & .10) - Photo, colour, c1960s, JGEM tyre pressure system, SGT Geoff Briggs. .11) - Photo, colour, c1960s, JGEM tyre pressure system. SGT Geoff Briggs. .12) - Photo, colour, c1960s, JGEM levelling scope, levelling staff, unidentified technicians. .13) & .14) - Photo, colour, c1960s, JGEM levelling scope, unidentified technician. .15) & .16) - Photo, colour, c1960s, probably survey operation adjusted height plotted on block base sheet. .1P to .16P - Some of the equipment is annotated on the frame of the 35mm slides.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

This set of 31 photographs was taken at the Corps Day Parade held at the Army Survey Regiment, Bendigo on the 26th of June 1991.The Corps Day Parade was held to commemorate the 76th anniversary of the formation of the Royal Australian Survey Corps. The Reviewing officer was the Commander of the 3rd Military District BRIG P. Davies AM ADC and the Parade Host was D-SVY COL Simon Lemon. Refer to items 9154.37P for more photographs taken during the parade; and 9155.27P for photographs taken afterwards during the tour of the unit and the family BBQ.This is a set of 31 photographs of the Corps Day Parade held at the Army Survey Regiment, Fortuna, Bendigo on the 26th of June 1991. The colour photographs are on 35mm negative film and scanned at 2400 dpi. They are part of the Army Survey Regiment’s Collection. .1) - Photo, colour, 1991. Photographer on the roof of the SGTS Mess Accommodation building. .2) - Photo, colour, 1991. Guests gather at the edge of the parade ground. The RSM in the foreground and the WO1 in the background are unidentified. .3) & .4) - Photo, colour, 1991. SGT Chris ‘Charlie’ Brown stands at one corner of the parade ground behind a Wild T2 theodolite mounted with a RED2L Electric Distance Measurement (EDM) instrument. .5) & .6) - Photo, colour, 1991. CPL Steve Wegener stands at one corner of the parade ground behind a Wild T2 theodolite. .7) & .8) - Photo, colour, 1991. The right markers of each squadron take their positions under RSM WO1 Graham Ragless’s commands. .9) - Photo, colour, 1991. The Officers move to the edge of the parade ground before taking posts. SGT Chris ‘Charlie’ Brown is in the foreground behind a Wild T2 theodolite .10) to .15) - Photo, colour, 1991. Army Survey Regiment follows the 3rd MD marches onto the parade ground. RSM WO1 Graham Ragless is in the foreground. .16) - Photo, colour, 1991. Army Survey Regiment at the halt. RSM WO1 Graham Ragless is in the foreground. .17) - Photo, colour, 1991. Headquarters Squadron performs the ‘Right Dress’. .18) - Photo, colour, 1991. Cartographic Squadron performs the ‘Right Dress’. RSM WO1 Graham Ragless is in the foreground. .19) to .21) - Photo, colour, 1991. Army Survey Regiment stands at ease during RSM WO1 Graham Ragless’s handover to ADJT CAPT Geoff Ford. .22) to .24) - Photo, colour, 1991. Army Survey Regiment fixes bayonets under ADJT CAPT Geoff Ford’s commands. .25) - Photo, colour, 1991. Army Survey Regiment stands at ease during ADJT CAPT Geoff Ford’s handover to 2IC MAJ Ray Redman .26) & .27) - Photo, colour, 1991. Army Survey Regiment Officers take posts under 2IC MAJ Ray Redman’s commands. .28) & .29) - Photo, colour, 1991. Army Survey Regiment stands at attention during 2IC MAJ Ray Redman’s handover to CO LTCOL Rene van den Tol. .30) & .31) - Photo, colour, 1991. Army Survey Regiment under CO LTCOL Rene van den Tol’s command awaits arrival of the official guests.There are no personnel identified. ‘Corps Day 26 Jun 1991’ annotated on negative sleeves.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna

This medical / hospital instrument was used in the Tawonga District General Hospital which was built in the 1950s specifically for the increase in population due to the Kiewa Hydro Scheme.Historical: Shows the development of scientific hospital equipment. Provenance: Used in the Tawonga District General Hospital which was remote and therefore required good equipment. Good condition and good interpretation capacity.3 stainless steel parts in a sealed clear plastic bag. Used for an ear wash. 1. large hollow cylinder each end embossed with lines for something to be screwed on. 2. Plunger that fits inside cylinder & could screw on. 3. Top with a nozzle that screws on the other end.2. ?? / Made in England. Rod is marked with 4 inscriptions equal distance apart - measurements.hospital equipment. medical equipment. tawonga. mt beauty. aural syringe. ear.

Small rule to measure distance when reading a scale map. Measurements in yards or meters.Small plastic rule, cream colour with black markings.map reading, scale ruler

Rectangular calculating instrument with (1) 'hinged lid' fitted with circular rotating dial for setting/reading altitude, speed, distance and temperature, (2) notebook inside lid, (3) circular dial with perspex cover, beneath which is (4) graph chart, moveable up-and-down by means of rotating knob on side of device. Curved brackets and elasticized straps on back for strapping onto pilot's leg.R.A.A.F. Ident. No. G6B/145 Serial No. WG/2233 COMPUTER NAVIGATIONAL Mk. III D. (Other inscriptions including instructions for use and scales for various measurements) "AB" hand written on strap (owner's initials?)

Boat builders and shipwrights use a spar gauge to transfer measurements and shapes onto their workpiece, particularly if they are working on a curved surface, like an oar or the hull of a boat. This spar gauge is an expanding gauge. It measures multiple equal distances at the same time, allowing for decreased work time on the job at hand. The tool is similar to a ‘toy’ designed in Australia in the 1960s called a Sketch-A-Graph, derived from the mathematics and mechanics of a ‘pantograph’. The shipwright’s tools on display in the Great Circle Gallery are connected to the maritime history of Victoria through their past owner, user and donor, Laurie Dilks. Laurie began his career as a shipwright in the mid-1900s, following in the wake of the skilled carpenters who have over many centuries used their craft to build and maintain marine vessels and their fittings. You can see Laurie’s inscription on the tool called a ‘bevel’. Laurie worked for Ports and Harbours, Melbourne, for over 50 years, beginning in the early 1960s. He and a fellow shipwright inscribed their names on a wheelhouse they built in 1965; the inscription was discovered many decades later during a repair of the plumbing. Many decades later Laurie worked on the Yarra moving barges up and down the river and was fondly given the title ‘Riverboat Man’ His interest in maritime history led him to volunteer with the Maritime Trust of Australia’s project to restore and preserve the historic WWII 1942 Corvette, the minesweeper HMAS Castlemaine, which is a sister ship to the HMAS Warrnambool J202. Laurie Dilks donated two handmade displays of some of his tools in the late 1970s to early-1980s. The varnished timber boards displayed the tools below together with brass plaques. During the upgrade of the Great Circle Gallery Laurie’s tools were transferred to the new display you see there today. He also donated tools to Queenscliffe Maritime Museum and Clunes Museum.The shipwright’s tools on display in the Great Circle Gallery are connected to the maritime history of Victoria through their past owner, user and donor, Laurie Dilks. Laurie began his career as a shipwright at Ports and Harbours in Melbourne in the mid-1900s, following in the wake of the skilled carpenters who have over many centuries used their craft to build and maintain marine vessels and their fittings.Spar gauge; a drawing tool with four flat brass bars, pointed at one end, are joined in such a way that they can expand and contract. The rounded ends of the two long bars are joined. The centres of the two shorter bars are crossed and joined. Each rounded end of a shorter bar is joined to one of the long bars towards the top of the bar. All of the joints swivel, allowing the gauge to expand and contract. It once belonged to shipwright Laurie Dinks.flagstaff hill, warrnambool, great ocean road, shipwreck coast, maritime museum, maritime village, shipwright, carpenter, shipbuilding, ship repairs, hand tool, equipment, ship maintenance, cooper, tool, marine technology, gauge, shipwright's gauge, spar gauge, laurie dilks, l dilks, port and harbours melbourne

This handheld portable pendulum quadrant scale was used to weigh small paper items such as letters and documents, powdered chemicals or metals like gold, and animal fleece samples. This mechanical scale can weigh up to a maximum of 10 ounces, which is about 285 grams or one-and-a-half cups of brown sugar. The operator holds the scale’s ring and connects the item to be weighed onto the wire clip. The weight of the item causes the pendulum to pivot, and the scale measures the weight of the object, indicated by the arrow. This scale belonged to Dr William Roy Angus and is now part of Flagstaff Hill’s comprehensive W.R. Angus Collection, donated by the family of Dr W R Angus, 1901-1970, surgeon and oculist. The W.R. Angus Collection: - The W.R. Angus Collection includes historical medical equipment, surgical instruments and material belonging to Dr Edward Ryan and Dr Thomas Francis Ryan, (both of Nhill, Victoria) and Dr Angus’ own belongings. The Collection’s history spans the medical practices of the two Doctors Ryan, from 1885-1926 plus that of Dr Angus, up until 1969. It includes historical medical and surgical equipment and instruments from the doctors Edward and Thomas Ryan of Nhill, Victoria. Dr Angus married Gladys in 1927 at Ballarat, the nearest big city to Nhill where he began as a Medical Assistant. He was also Acting House surgeon at the Nhill hospital where their two daughters were born. During World War II He served as a Military Doctor in the Australian Defence Force. Dr Angus and his family moved to Warrnambool in 1939, where Dr Angus operated his own medical practice. He later added the part-time Port Medical Officer responsibility and was the last person appointed to that position. Both Dr Angus and his wife were very involved in the local community, including the planning stages of the new Flagstaff Hill and the layout of the gardens there. Dr Angus passed away in March 1970.This letter scale is the only one of its type in our collection. It is an example of objects belonging to Dr. W. R. Angus, 1901-1970, surgeon and oculist. The W.R. Angus Collection is significant for still being located at the site it is connected with, Doctor Angus being the last Port Medical Officer in Warrnambool. The Collection includes historical medical objects that date back to the late 1800s.Letter scale, a handheld quadrant fixed pendulum scale made from silver-plated metal. This small weighing instrument is shaped like a quarter-circle with a metal ring, a fixed pendulum counterweight and a decorative pivoting arrow indicator. A hanger clip is attached to a short arm of the scale. Measurements are embossed on the arc of the circle, labelled in ounces (oz) and ranging from 0 to 10 at unequal distances apart. The scale is part of the W.R. Angus Collection.Scale measurements, "OZ" (ounces), "0 /14 1/2 1 2 3 4 5 6 7 8 9 10 "flagstaff hill, warrnambool, maritime village, maritime museum, shipwreck coast, great ocean road, flagstaff hill maritime museum and village, dr w r angus, mira hospital, w.r. angus collection, scale, weighing instrument, measure weight, postal scale, chemist scale, letter, weigh, post, office, quadrant scale, letter scale, handheld, portable, mechanical scale, pendulum scale, fixed balance scale

Before metric measurement was introduced land was measured by a tool of chains and links called a surveyor's chain. The first surveyor's chain was designed by the English clergyman and mathematician Edmund Gunter (1581-1626) and introduced in 1620. It comprised of a metal chain made up of 100 links measuring a precise overall length of 66 ft or 22 yards, with each link measuring 7.92 inches (201.168 mm). The Gunter's chain was originally intended to be used in the accurate laying out and measurement of plots of land, for legal and commercial purposes, but was subsequently widely used by surveyors throughout the British Empire and Europe, with an Imperial mile being 80 times the Gunter's chain length. A tool used to survey the land before the introduction of the metric system.Surveyor chain Gunter type, 100 links measuring 66 feet in length. Hand grips at each end of chain. Wire links are approximately eight inches long. Incised tags or markers are attached to each tenth link of chain to assist with the more accurate recording of intermediate distances.surveying tool

From Scarborough Maritime Heritage Centre: A Yacht Log was a nautical instrument for measuring a vessel's speed and distance travelled. When navigating a ship it is essential to be able to estimate the boat's speed and distance travelled to determine its position at sea. In times past the only way to measure a ship's speed was to throw a wood log into the water and observe how fast it moved away from the ship. In the 16th century, the log was fastened to a rope knotted at set intervals. The log was thrown over the stern (back) of the vessel and a crew member counted the number of knots that were paid out in a set time. From this they could estimate the speed of the vessel through the water. This was known as streaming the log and is also the derivation of the knot as a measurement of nautical speed. In 1878, Thomas Ferdinand Walker (1837–1921), an engineer in Birmingham, patented a mechanical log in which a recording instrument was attached to a rail at the stern of a vessel connected by a long cord with a rotor which was towed behind the ship. The instrument dial recorded the distance travelled. The 'Log' at the Heritage Centre was recovered from a skip in Scarborough and was one of the first artefacts collected by the volunteer group. It is made of brass with a ceramic dial, with the main scale marked from 0 to 100 nautical miles and an inset dial marked from 0 to 10 miles. It has a fixing plate, on which it can turn, with which it would have been attached to the 'taffrail', the rail at the stern of a ship, usually on the starboard side. The Walker’s Excelsior Mark IV instrument was designed for smaller vessels, such as yachts, launches and fishing vessels. Its exact date of manufacture cannot be determined but this design was manufactured in the first half of the 20th century. These mechanical logs have now been superseded by electronic equipment such as GPS navigation instruments.This instrument was made by a significant nautical instrument manufacturer and demonstrates the innovation needed at the time for improved navigation and safety at sea.Timber Box containing an instrument for measuring speed and distance. There is a brass, cased log with a white enamel dial. It also includes a towing cord and cylindrical rotator. The box has paper labelling on the front and also the inside of the lid. The label on the inside of the lid has instructions for use. Although the lid is hinged it has broken off and is separate. The hinges remain attached.Enamel Dial: Walkers Patent Excelsior Yacht Logmaritime, maritime history, tool, navigational tool, navigational instrument, navigation, sailing, walkers, maritime technology, walker & son

Prior to the sealing of the Princes Highway west of Orbost, the road surface was anything but good, even by C1917 when cars started to use the road. From Orbost the old road via Marlo to Sydenham was abandoned for the new location which traversed more rugged country via Cabbage Tree, Bell Bird and Club Terrace to Cann River, and the reason for this diversion was on account of settlements being established at Murrungowar and Club Terrace, at which latter place there was a temporary rush to obtain gold. This road was constructed by the Public Works department and a maximum grade of 1 in 19 was adopted, and as speed was not to be catered for the grade followed in and out round the spurs and gullies, resulting in a maze of turns and twists which required a good deal of skill on the part of the horse driver to negotiate." - Bairnsdale Advertiser, Friday, May 2, 1947. (More information from Newsletter February 2010)This is a pictorial record of an early road distance sign on a major highway through East Gippsland. The distances are indicated in miles, a measurement standard no longer in use.A black / white photograph postcard of the signpost at the Victorian - New South Wales border. It shows distances to Sydney and Eden on one arrow and distances to Melbourne and Genoa on another. on front - Vic - NSW Borderprinces-highway-east-gippsland road-transport road-sign

An octant is an astronomical instrument used in measuring the angles of heavenly bodies such as the sun, moon and stars at sea in relation to the horizon. This measurement could then be used to calculate the altitude of the body measured, and then the latitude at sea could also be calculated. The angle of the arms of an octant is 45 degrees, or 1/8 of a circle, which gives the instrument its name. Two men independently developed the octant around 1730: John Hadley (1682–1744), an English mathematician, and Thomas Godfrey (1704–1749), a glazier in Philadelphia. While both have a legitimate and equal claim to the invention, Hadley generally gets the greater share of the credit. This reflects the central role that London and the Royal Society played in the history of scientific instruments in the eighteenth and nineteenth century's. There were also two others who are attributed to having created octanes during this period, Caleb Smith, an English insurance broker with a strong interest in astronomy (in 1734), and Jean-Paul Fouchy, a mathematics professor and astronomer in France (in 1732) In 1767 the first edition of the Nautical Almanac tabulated lunar distances, enabling navigators to find the current time from the angle between the sun and the moon. This angle is sometimes larger than 90°, and thus not possible to measure with an octant. For that reason, Admiral John Campbell, who conducted shipboard experiments with the lunar distance method, suggested a larger instrument and the sextant was developed. From that time onward, the sextant was the instrument that experienced significant development and improvements and was the instrument of choice for naval navigators. The octant continued to be produced well into the 19th century, though it was generally a less accurate and less expensive instrument. The lower price of the octant, including versions without a telescope, made it a practical instrument for ships in the merchant and fishing fleets. One common practice among navigators up to the late nineteenth century was to use both a sextant and an octant. The sextant was used with great care and only for lunar sightings while the octant was used for routine meridional altitude measurements of the sun every day. This protected the very accurate and pricier sextant while using the more affordable octant for general use where it performs well. The invention of the octant was a significant step in providing accuracy of a sailors latitude position at sea and his vessels distance from land when taking sightings of land-based landmarks.Octant with metal handle, three different colored shades are attached, in wooden wedge-shaped box lined with green felt. Key is attached. Two telescope eyepieces are in box. Some parts are missing. Oval ink stamp inside lid of box, scale is graduated to 45 degrees. Ink stamp inside lid of box "SHIPLOVERS SOCIETY OF VICTORIA. LIBRARY"instrument, flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, octant, navigation, nautical instrument, navigation instrument, john hadley, sextant, astronomical instrument

The Australian Customs Service, Melbourne, donated a set of gauging instruments, and Port Fairy Customs donated another instrument, the Sike’s Hydrometer, to Flagstaff Hill Maritime Village, all of which were no longer required. However these ullaging tools were in use for many years by Customs officials, called Gaugers. Ullaging is a term describing the measurement of the amount of liquid remaining in a container of spirits such as a cask or barrel. It can also measure the free space or head space remaining. The primary role of customs officers in Victoria was to calculate the tariff or excise duty payable on goods imported into Victoria. (Excise duty is a tax on goods produced within a country, and customs duty is imposed on imports.) Customs officers spent a great deal of their time measuring and weighing goods, and then calculating the amount of duty to be paid by the importer. The tariffs for different products varied, and officers consulted published lists. Calculating the duty payable on a barrel of brandy was a detailed task. The gauger had to measure the barrel to determine its volume. Barrels were irregular in shape, and finding the volume required several measurements and checking tables of figures. Alcoholic content was then measured with a hydrometer. The duty paid varied according to the alcoholic strength of the spirits. Uniform national customs and excise duties were operative in Australia from October 1901. These tools were still being used in Australia in the 1950’s. The Federal Government still imposes excise taxes on goods such as cigarettes, petrol, and alcohol. The rates imposed may change in February and August each year in response to changes in the consumer price index. ULLAGING TOOLS (1) Head Rod - this instrument measures the diameter of the heads (top and bottom ends) of a cask or barrel. The shaped brass pieces on the head rod enable the diameter of a barrel to be measured inside the chimes at the head end. The slide rule could then be used to calculate the internal volume of the barrel. On the reverse side is a set of ullaging scales, used like those on any ullaging rule, to calculate the volume of liquid in a partially filled barrel. (2) Bung Rod – this instrument measures the diameter of a cask or barrel when it is lying on its side. It is a rod that fits into the ‘bung’ hole of a cask and is long enough be extended to reach the opposite side of the cask. The brass sliding pointer can be moved to mark the ‘wet’ line. When the rod is removed the bung measurement can be read from the scale on the rod. (3) Long Calipers - this instrument measures the length of the cask between the heads. It has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards then turned inwards at the ends so as to reach over the heads of the casks without touching the projecting ends. The centre pieces enable it to extend or contract, changing the distance between the two other parallel sides, the distance they are apart being shown by the rule on the sliding pieces. (4) Cross Calipers – this instrument is used to take the bung diameters of casks, or "the Cross " as it is called. This instrument has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards, together forming a 3 sides of a rectangle with the centre pieces enabling it to extended or contracted, changing the distance between the two other parallel sides, the distance they are apart being shown by a the rule on the sliding pieces. (5) Sike’s Hydrometer – this instrument is used to gauge the strength of different alcoholic spirits when fitted with the different weights in the set. Every set is individually calibrated to ensure that it meets the exact Standard Weight and Measure compliance, then every piece in that set is stamped with the same number by the Calibrator, to ensure that the measurements are taken using the same hydrometer set. [References: A Handbook of Practical Gauging, Janes Boddely Keene of H.M. Customs, 1861, F. Pitman, London; Customs Act, Volume 2, No. 1, April 1999; Old Customs House website ] Head Rod, ullaging gauge. Long wooden rod made of three joined sections, brass hook on end, sliding centre section with hook, measurements marked along each section as on a slide rule. Used for measuring diameter of heads of casks in order for Customs to calculate excise (tax) on the contentsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, head rod, gauging rod, ullaging rods, measuring instruments, customs tax

A sextant is an astronomical instrument used to determine latitude and longitude at sea by measuring angular distances, especially the altitudes of the sun, moon, and stars. It is a doubly reflecting navigation instrument and used mainly by sailors to measure the angular distance between two visible objects. The name comes from the Latin sextans, or “sixth part of a unit,” because the sextant’s arc can be 60° or 120° of a circle depending on the model used. The primary use was to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation. The estimation of this angle is known as sighting or shooting the object, or taking a sight. This angle and the time when it was measured is used in order to determine Greenwich Mean Time and hence longitude. Sighting the height of a landmark on land can also give a measure of distance from that object. History: The development of the sextant was as an improvement over the octant, an instrument designed to measure one's latitude. The octant was first implemented around 1731-present but can only measure angles up to 45°. As larger angles were needed to allow the measurement of lunar objects - moon, stars and the sun - at higher angles, the octant was superseded by the sextant. The sextant is a similar instrument but better made and allows larger angles from 60° to 120°. This improvement allows distances to be accurately calculated thereby giving longitude when used with a chronometer. The sextant was derived from the octant in 1757, eventually making all previous instruments used for navigational positioning obsolete. The sextant had been attributed to by John Hadley (1682–1744) and Thomas Godfrey (1704–1749), but reference to the sextant was also found later in the unpublished writings of Isaac Newton (1643–1727). Earlier links can be found to Bartholomew Gosnold (1571–1607) indicating that the use of a sextant for nautical navigation predates Hadley's implementation. In 1922, the sextant was modified for aeronautical navigation by Portuguese navigator and naval officer Gago Coutinho. It should be noted that the octant and quadrant are in the same family as they were, and all are, regarded as sextants. The sextant is representative of it's type and although not fully complete it demonstrates how 18th,19th and 20th century mariners determined their latitude and longitudinal to determine their position on a chart, allowing them to navigate there way across the world's oceans. It also demonstrates the skill and workmanship of the early instrument makers that operated scientific instrument businesses from London and other areas of England to provide most of the navigational instrumentation used by commercial and military navies of the time.Sextant with square, fitted box of polished wood, "Hezzanith" brand. Box contains many parts for the sextants use. On certificate "Heath & Co, London. Sextant Number Y 822". Catch on lid "DEFIANT LEVER" and "PATENT NUMBER 187.10". Maker's certificate is attached to the inside of the box.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant box, sextant, hezzanith, heath & co, navigational instrument, george wilson heath, astronomical instrument, instrument manufacturers, scientific instrument, navigation, celestial navigation, octant, quadrant, lunar navigation

The Excelsior IV Log is a nautical instrument for measuring a vessel’s speed and distance travelled. When navigating a ship it is essential to be able to estimate the boat’s speed and distance travelled to determine its position at sea. In times past the only way to measure a ship’s speed was to throw a wood log into the water and observe how fast it moved away from the ship. In the 16th century, the log was fastened to a rope knotted at set intervals. The log was thrown over the stern (back) of the vessel and a crew member counted the number of knots that were paid out in a set time. From this, they could estimate the speed of the vessel through the water. This was known as streaming the log and is also the derivation of the knot as a measurement of nautical speed. The Walker’s Excelsior Mark IV instrument was designed for smaller vessels, such as yachts, launches and fishing vessels. Historical: Thomas Walker & Son was internationally renowned in the manufacturing of ships logs, founding father , Thomas Walker (1805–1871), an engineer in Birmingham, patented a mechanical log in 1878 which was a recording instrument that attached to a rail at the stern of a vessel connected by a long cord with a rotor which was towed behind the ship. The instrument dial recorded the distance travelled. Thomas Walker first went into business to manufacture stoves at 58 Oxford Street Birmingham. Walker’s self-feeding stove was widely lauded at the Paris Exhibition of 1855, winning a prize medal and kick starting the first of many notable innovations for the Walker family's manufacturing business. However, it wasn’t until working on an earlier ship’s log model invented by his Uncle that Thomas Walker became interested in the further development of this device, used to ascertain a ship’s speed. Walker continued to improve on the common log for the company of Massey & Sons and these improvements were deemed revolutionary. This log became a firm favourite of the West India Association (British-based organisation promoting ties and trade with the British Caribbean), being the most common log in use for two generations. It took until 1861 for Thomas Walker and his son, Thomas Ferdinand Walker (1831-1921) to patent the first Walker log of many. Together, with the introduction of the A1 Harpoon Log two years later, they established the Walker Log Business as a force to be reckoned with. By the time of his passing in 1871, Thomas Walker Snr had not only founded a family business with considerable staying power but also instilled a tradition of public service. Having sat as a representative on the Birmingham Town Council for 15 years and played an active role in public works, he was soon given the nickname of ‘Blue Brick Walker’. Much like his father, Thomas Ferdinand Walker changed the face of the maritime industry. His patent of 1897, the ‘Cherub’ log, was a notable departure from the past providing a far more accurate reading and replacing the majority of logs of the age. They were the first to produce an electric log and the Walker factory was one of the first to introduce the 48 hour work week for employees. The ship log was invented and made by a significant marine instrument maker and innovator of machinery. It demonstrates the huge leap taken to improve navigational accuracy at sea with an instrument that was in use for decades.Ship's Taff Rail Log, rope attached. Walker's Excelsior IV Log model. Nautical miles dials: units and 10's. "Walker's Excelsior IV Log", "Made in England by Thomas Walker, Birmingham"flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, log register, taff rail log, taffrail log, marine navigation, a1 harpoon log, cherub’ log, walker’s excelsior mark iv log, ship’s log instrument, mechanical ship’s log, measure ship’s speed, nautical instrument, navigation instrument, massey & sons, thomas walker, blue brick walker, thomas walker & son, thomas ferdinand walker, 48 hour work week

Harold Gatty was born on January 5th, 1903 in Campbell Town, Tasmania. He was a navigator and aviation pioneer. He began his career learning navigation at the age of 14 as a midshipman at the Royal Australian Naval College but withdrew after three years and became an apprenticed ship's officer with the Patrick Steamship Company of Sydney. After W. W. 1 he joined the Australian Merchant Navy where he learned the constellations while standing night watch and became an expert in celestial navigation while serving on many ships sailing between Australia and California. In 1927 he moved to California and opened a navigation school and also a laboratory repairing navigational equipment. At this time he became very interested in air navigation and was aware of the limitations of existing methods and instruments for aerial navigation. He began researching ways of improving aerial navigation. Two early inventions of his were his air sextant and a ground speed and drift indicator which formed the basis of the automatic pilot which later came to be standard equipment on most aircraft. He worked with several record breaking pilots including Ann Morrow Lindbergh (who went on to serve as a navigator for her husband Charles Lindbergh), helped Wiley Post break the world record circumnavigating the Earth, invented a new method of "dead reckoning" that revolutionised the ability to fly safely through cloudy conditions without drifting off course and famously navigated a small plane (whilst trying to cross the Pacific) over 1900 km through fog (with no radio) and using only his dead reckoning techniques, back to their starting point in Japan after they developed fuel problems. In 1932 Gatty received the Distinguished Flying Cross from President Hoover. In 1934 Gatty formed the South Seas Commercial Company with Donald Douglas with the aim to deliver air services to the islands of the South Pacific. The Company was sold to Pan Am but he continued to work for them. In 1935 he went on a sailing expedition investigating several small islands in the South Pacific and was briefly marooned on Baker Island. He was able to use his extensive knowledge of seabird habits to save the crew. He was also very interested in the ability of the Polynesians to navigate using the stars. During the Second World War Gatty was given the honorary rank of Group Captain in the Royal Australian Air Force (RAAF) and worked for the U. S. Army Air Forces (USAAF) in the South Pacific. In 1943 he moved to Washington where he developed a survival book (The Raft Book) specifically for boat crews or air crews flying over the Pacific to help them survive and navigate their life rafts in remote areas of the ocean. The original book was 152 pages long however a condensed version was made which consisted of a 64 page booklet, combined map and star chart and calendar strip enclosed in a waterproof slipcase, to be placed in life rafts for emergency use. The booklet included navigational advice and ideas such as ocean currents, estimation of distance, using a compass, measurement of angles, recognising and steering by the stars, land indications from sea birds, migration of sea birds and insects, sounds from the land, the scent of the land and ocean currents and the colour of the sea etc. After W.W.2 Gatty moved to Fiji and formed Fiji Airways (which later became Air Pacific). Harold Gatty died in August 1957.The two copies of "The Raft Book" are significant as they are a written summary of the many methods of sea navigation (both modern and historical) that existed in the 1940's. They are also a record of Harold Gatty, who played a significant role in the development of modern day aerial navigation using his understanding of different sea navigational techniques.Two rectangular brown packets with waterproof coverings (oiled paper) titled "The Raft Book" by Harold Gatty. Each packet contains a folded 64 page paper booklet with detailed instructions for navigating a small craft in open seas, a folded chart (with a map of the world and oceans, well known constellations, latitude and longitude charts, Greenwich time and a scale for string lengths and Harp scale) and a long folded paper calendar strip.Front of package - "WATERPROOFED EDITION OF/ THE RAFT BOOK / By Harold Gatty / BOOK AND WORLD CHART / FOR / EMERGENCY NAVIGATION / To open envelope tear along above line. If the envelope is used again fold the flap to keep contents dry. 1. This envelope contains a book, chart and tape for emergency navigation. The contents are folded to take up the least possible space and therefore should not be removed until needed. 2. if the chart and tape are immersed in water for a long period, there will be a slight variation in the scale but the strength and resistence to tear of the paper will not be changed. In the event of long immersion, dry the chart and tape as much as possible before using in order to in order to get the greatest accuracy in scale. Front of booklet - THE RAFT BOOK / LORE OF THE SEA AND SKY /By Harold Gatty IMPORTANT FOR YOUR SECURITY/Upon abandoning ship you may have to be your own navigator. Take the following pre/cautions for your own safety:/ Carry a good type of pocket watch / keep it wound and have it running on Greenwich (England) / Time, which you can get from the navigating officer. / Keep track of the date at Greenwich; and on a 24-hour basis, / know whether the time is, say, 6 hours (6 A.M.) showing on / your watch, or 18 hours (6P.M.) Greenwich. / PROECT YOUR WATCH. GET A RUBBER SACK FOR IT (OBTAIN FROM PHARMACIST) AND KEEP IT DRY / KEEP A PENCIL IN YOUR POCKET/ POSITION OF SHIP WHEN ABANDONED PRINTED IN UNITED STATES OF AMERICA GEORGE GRADY PRESS, NEW YORK/COPYRIGHT, 1943, BY HAROLD AND FENNA GATTYflagstaff hill maritime museum and village, shipwreck coast, warrnambool, the raft book, harold gatty, book and world chart for emergency navigation, ww 2, ww ii, navigation, air navigation, aerial navigation, lindbergh, wiley post, dead reckoning, south seas commercial company, u.s. army airforce, usaaf, survival book, life rafts, sea navigation, emergency navigation, fiji airways, harp scale

William Baragwanath studied at the Ballarat School of Mines, obtained a Geology certificate in 1911. He was born on 01 August 1878 at Ballarat. He joined the Victorian Department of Mines in 1897 and was Chief Mining Surveyor from 1924 to 1943. Baragwanath died at Prahran on 20 September 1966. See Book 2 - Catalogue Number 4530Marbled card covered exercise book with brown tape spine containing handwritten notes by William Baragwanath on Astronomy and astronomical, geodetic, geights and distances, North Line Latitue, Lime, etc., problems . Headings include: Astronomy refraction Correction for Semi diameter Determination of True Meridian Elongation Observation Latitude Determining the TIme Convergence of Meridian Barometric Measurement of Heights Formulae Latitude Observation On the Division of Land Calculations for Observations by a Single Altitude Computations Triginometrical Rations of Two Arcsballarat school of mines, astronomy, william baragwanath