A ship is said to heel when it leans over to one side. A heeling instrument corrects an error on the ships magnetic compass caused by this lean or heel unless the compass had been stabilized and corrected with small magnets to prevent such errors. Instrument for measuring ships heeling error, in wooden boxNo. 0.408heeling, heeling error, compass, marine instruments

an instrument for drawing large circles or arcs, consisting of a horizontal beam along which two vertical legs slide. Also called a trammel.Beam compass used for marking out an arc or circle; 25cm beam with 2 x 24cm extensions, 3 pencil lead holders and one nib in original box [damaged].W. H. Harling Ltd. London.beam compass, trammel

Unknown history but potentially off wrecked yachtPortable compass in metal case with glass front and spirit light compartment on left sidecompass, navigation

The binnacle was originally from a lifeboat of the tug 'Melbourne' previously 'Howard Smith'. When the vessel sank at Gellibrand [Williamstown], the binnacle was under water for about one month. The lifeboat was later cut loose from the wreck by a salvage crew [as told by the donor].A good example of a small binnacle and compass as used on a lifeboat from the 1950s.Binnacle, brass with wick light mounted on timberbinnacle, compass, tug boat, 'melbourne', 'howard smith'

Built in 1914 by Fleming and Ferguson in Paisley Scotland as Sir William Matthews for the Ceylon Government, she was a twin screwed steam bucket dredge. She was purchased from the Western Australian Government by the Melbourne Harbour Trust on 10 October 1941. After an extensive overhaul, the vessel was renamed the George Kermode and commenced operation in Victorian waters on 22 June 1942. The George Kermode was scuttled by the Department of Conservation, Forests and Land off Phillip Island on the 1 April 1976 as part of an artificial reef program. This vessel was used to dredge the Port Phillip channels from 1942 and is of cultural significance to Queenscliffe.Binnacle compass from the 'George Kermode'Compass No. 3127N Sestrel Type 89098bucket dredge, port phillip, melbourne harbour trust

Ship's binnacle mounted on wooden stand possibly ornamentalTrade Mark 'Sistral', Henry Brown & Son Ltd, Station Works, Barking, Essex, Type SJbinnacle, compass

Formerly of Station Works, Wakering Road, Barking, Essex, Henry Browne & Son were important British compass makers. The company was founded in the nineteenth century in Barking and London. They were respected English instrument makers who made fine quality compasses, ships clocks, inclinometers, sextants and chandlery items for over 140 years. Their "Dead Beat" compass, which was well dampened to reduce oscillation, was fitted to many Allied ships during the Second World War. Sestrel was their famous Trade Mark brand. The company was sold to John Lilley & Gillie Ltd and SIRS Navigation, both UK companies, in 1993. Example of a hand held compass used in WWIIA Sestrel hand held bearing compass with wooden handle in own glass fronted, wooden container.Sestrel Henry Browne & Son Ltd Barking Londoncompass, navigation

8 cm compass Pattern 9628 in wooden boxCompass Patt 9628S Delicate instrument handle with care 287A/62compass, navigation

A round hand held navigational engineer compassEngineer Compassnavigation, compass

Representative of a piece of military equipment used in both world wars.Military type prismatic compass with hinged lid and rotating glass face with luminus markings allowing the instrument to be used for night navigation. Black metal construction.compass, military

Seven boxed drafting sets containing compasses, pens and dividers. Padded lids, interiors lined with velvet, blue, black or green. .1) Belonged to Peter Fraser. .2) Belonged to Ian Hooper. .6) Belonged to Noel Cawthorn. .6 & .7) Embossed on lids "Eco O Bra / Kandidat". .1) "Koala / Series / Made in Australia".instruments, trades, drafting, containers

After years of precursory surveying, debate and proposals the most ambitious civil engineering project of the day, the Overland Telegraph Line, began construction in September 1870. Superintendent of Telegraphs, Sir Charles Todd led the construction through “terra incognita,” guided by the precursory surveys of John McDowall Stuart and technologies such as his prismatic surveying compass. The unknown and hostile landscape claimed the lives of several men and scores of transport animals in the dogged pursuit of telegraphic connection to the rest of the world. Completed in August 1872, the Line connected Australia to the world via telegraph wires running 3,200 kilometres from Port Augusta in South Australia, to Darwin, then connecting via submarine cable to Java and beyond. The “earth [had been] girdled with a magic chain” according to the then Governor of New South Wales, Sir Hercules Robinson. How does it work? For use in surveying, the sight vane and prism are turned up on their hinge and the instrument is held horizontally either in the palm of one's hand or on a tripod. Two small discs of red and green glass attached to the prism can be flipped down over the sight line to reduce glare. The objective is to bring the subject into the sightline created by the prism, aligning with the thread of the sight-vane until the subject is bisected evenly. Once aligned, the division on the card may be read through the prism. This reading provides the magnetic azimuth, used for calculating the bearings of distant landmarks. Circular instrument mounted in a brass case with glass window and brass lid. The compass card face four black compass points printed on mint green paper; on the underside the magnetic needle would be affixed, all held in place by a brass knob at the centre. The arched labels of "Sawtell" and "Adelaide" and the Prince of Wales feathers appear to have been affixed with adhesive which has since yellowed in the areas of application on the compass card. The compass face is printed with numbers, every 10 degrees from 10 - 360, printed in reverse indicating this compass would have once held a mirror at the sighting bracket. On one side of the brass case is a brass hinged sighting-prism, possibly of ebonite. The sighting-prism is mounted in a hinged brass bracket on one edge of the brass case. It has two flip-type filter glasses (red and green) and folds down into a retracted travelling position. A hinged brass bracket on the opposite edge would have held the sighting bracket - carrying the sighting vane and mirror - which is now missing or removed. Under the hinge is a lever, possibly related to the movement of the bracket. Underneath the brass case is an indented circle with screw threads, possibly for attachment to a tripod, and indistinguishable marks scratched into the surface.Etched on to the centre of the lid, "Sawtell ADELAIDE / No 792." Affixed to the paper compass face, possibly from separate pieces of paper, "SAWTELL / ADELAIDE" with the Prince of Wales Feathers above "SAWTELL". Underneath on remains of white tape in red: "159."surveying, compass, charles todd, overland telegraph line, telegraph

Sighting compass / surveyors compass used in conjunction with theodolite for accurate readings of angles between designated visible points in the horizontal and vertical planes.Brass surveyors cross with original box. Used in conjunction with theodolite to take compass readings. Architects' / N. H. SEWARD / Instrumentscity of greater bendigo surveying

An hourglass or sandglass is an instrument for measuring a defined time and can be used perpetually by simply turning it over immediately the top bulb empties. The clear blown glass is shaped into two equal sized bulbs with a narrow passage in the centre and contains uniform sized sand or glass particles in the lower bulb. The width of the neck regulates the constant flow of the particles. The glass is held in a stand with top and bottom of equal shape and size. Hourglasses can measure an infinite variety of time by gauging the size of the particles, the shape and size of the bulbs and the size of the passage between the bulbs, thus measuring hours or minutes or even seconds. Generally an hourglass sits between discs of wood at the ends, which are joined by long wooden spindles between the ends and tightened by screw caps. The length of time can be adjusted by adding or removing sand particles. The use of the marine sandglass (or hourglass) has been recorded in the 14th century in European shipping. A one minute sandglass was used in conjunction with the ship’s log for ‘dead reckoning’, (see below) that is, for measuring the ship’s speed through the water. They were also used to regulate ringing the ship’s timetable; for example a 4 hour sandglass was used for the length of the sailors’ watch, and a half hour timer for taking of readings for the ship’s log; the ship’s bell would be rung every half hour. It was usually the role of the cabin boy to watch and turn the sandglasses over at the exact time of them emptying their upper chambers and to ring the ship’s bell. Hourglasses have been used historically for many hundreds of years. Some have been used for timing church sermons, in cooking, in industry and at sea. Even today they are used for measuring the cooking time of eggs and timing a player’s turn in games such as Boggle and Pictionary. The sandglasses at sea were gradually replaced in the late 1700’s to early 1800’s by the more accurate chronometers (marine clocks) when they became reliable instruments. DEAD RECKONING (or Deduced Reckoning) Dead reckoning is the term used to describe the method of calculating the ship’s position from its speed and direction, used in early maritime travel, mostly in European waters. Both the (1) speed and the (2) direction of travel were recorded on a Traverse Board at half-hourly intervals during a helmsman’s watch of 4 hours. The navigator would record the readings in his ship’s log, plot them on his navigational chart and give his updated course directions to the next helmsman on watch, along with the cleared Traverse Board. This was a very approximate, but none-the-less helpful, method of navigation. The wooden Traverse Board was a simple pegboard with a diagram of a compass with eight peg holes along the radius to each of the compass points, plus a grid with ascending half hours in the left column and increasing ship’s speed in knots in a row across the column headings, with a peg hole in each of the intersecting cells. A number of wooden pegs were attached to strings on the board. By placing one peg consecutively in the direction’s radius hole, starting from the centre, and the speed holes when the half hourly reading was taken, a picture of speed and direction for the whole 4 hour watch was created. (1) To measure the ship’s speed a one minute hourglass timer was usually used to measure the ship’s speed through the water and help to calculate its longitude. A rope, with knots at regular standard intervals and a weight such as a log at the end, would be thrown overboard at the stern of the ship. At the same time the hourglass would be turned over and a seaman would start counting the number of knots on the rope that passed freely through his hands as the ship travelled. When the timer ran out the counting would be stopped. A timer of one minute (one-sixtieth of an hour), knots spaced one-sixtieth of a nautical mile apart, and simple arithmetic easily gave the speed of the ship in nautical miles per hour ("knots"). This would be recorded every half hour. The speed could however be inaccurate to the travel being affected by ocean currents and wind. (2) To calculate the ship’s direction a compass sighting would be recorded each half hour.Marine hourglasses or sandglasses were used from around the 14th to 19th century during the time of sailing ships. This hourglass is representative of that era, which is during the time of the colonisation of Australia. Hourglass or sandglass; an instrument used to measure time. Two equal sized clear glass bulbs joined with a narrow passage between them, containing equal sized particles of sand grains in lower bulb. Glass sits in a brass collar at each end, in a frame comprising 3 decorative brass columns or posts, each attached top and bottom, using round screw-on feet, to round brass discs. Disc have Roman numerals for the numbers 1 - 12 pressed into their inner surfaces and hieroglyphics on the outer surfaces. Roman numerals on inner surface of discs " I II III IV V VI VII VIII IX X XI XII " Hieroglyphics impressed on outer surface of discsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, horology, hourglass, hour glass, sandglass, sand glass, timing instrument, dead reckoning, deduced reckoning, finding latitude at sea, sandglass with hieroglyphics and roman numerals, hourglass with hieroglyphics and roman numerals, brass hourglass

Both items belonged to Captain Henry SOUTHBY, 39th Batt AIF, KIA 12.10.1917. Refer Cat No 1906 for service details also 1905P.1) Compass Compass, round, metal, silver, face opens on a hinge with compass bearings in black over a white face. The inside face is engraved as is the outside of the hinged opening. A circular ring is on the top of the compass. 2) Watch Fob Watch, metal, round. One face opens to show time with white face and black numbering. The rear opens to show 9 small clock faces showing the time in 9 countries. The top has a circular ring.1) Inside Face "H.SOUTHBY Bendigo", outside face "HS" 2) "CF 12355"horology-watches, instruments - general, watch, compass

A prismatic compass is a common navigation and surveying instrument which was used extensively by the Forests Commission The compass most commonly used to run a traverse line. The compass calculates bearings of lines with respect to magnetic needle. A magnetic deviation correction was needed to convert the reading to a true bearing The compass could also determine angles between the traverse and waypoints (such as hilltop features). Commonly used for navigation. Largely replaced by modern GPS technology.Ex Army WW2 prismatic compass with leather case and strap. Rugged design and made of metal the internal compass plate floats on oil to help it stabilise The user lines up the direction of travel with the hair sightline in the fliptop cover and readings are taken through the viewfinder prism (hence the name).forest measurement, surveying, forests commission victoria (fcv)