In 1941, the scientific instrument manufacturing firms of  Henry Hughes & Son Ltd, London, England, and  Kelvin Bottomley & Baird Ltd, Glasgow, Scotland, came together to form Kelvin & Hughes Ltd. Kelvin Company History: The origins of the company lie in the highly successful and strictly informal relationship between William Thomson (1824-1907), Professor of Natural Philosophy at Glasgow University from 1846-1899 and James White, a Glasgow optical maker. James White (1824-1884) founded the firm of James White, an optical instrument maker in Glasgow in 1850 and was involved in supplying and mending apparatus for Thomson university laboratory and working with him on experimental constructions. White was declared bankrupt in August 1861 and released several months later. In 1870, White was largely responsible for equipping William Thomson laboratory in the new University premises at Gilmore hill. From 1876, he was producing accurate compasses for metal ships to Thomson design during this period and this became an important part of his business in the last years of his life. He was also involved in the production of sophisticated-sounding machinery that Thomson had designed to address problems encountered laying cables at sea, helping to make possible the first transatlantic cable connection. At the same time, he continued to make a whole range of more conventional instruments such as telescopes, microscopes and surveying equipment. White's association with Thomson continued until he died. After his death, his business continued under the same name, being administered by Matthew Edwards (until 1891 when he left to set up his own company. Thomson who became Sir William Thomson and then Baron Kelvin of Largs in 1892, continued to maintain his interest in the business after James White's death. In 1884 raising most of the capital needed to construct and equip new workshops in Cambridge Street, Glasgow. At these premises, the company continued to make the compass Thomson had designed during the 1870s and to supply it in some quantity, especially to the Admiralty. At the same time, the firm became increasingly involved in the design, production and sale of electrical apparatus. In 1899, Lord Kelvin resigned from his University chair and became, in 1900, a director in the newly formed limited liability company Kelvin & James White Ltd which had acquired the business of James White. At the same time Kelvin's nephew, James Thomson Bottomley (1845-1926), joined the firm. In 1904, a London branch office was opened which by 1915 had become known as Kelvin, White & Hutton Ltd. Kelvin & James White Ltd underwent a further change of name in 1913, becoming Kelvin Bottomley & Baird Ltd. Hughes Company History: Henry Hughes & Sons were founded in 1838 in London as a maker of chronographic and scientific instruments. The firm was incorporated as “Henry Hughes & Sons Ltd” in 1903. In 1923, the company produced its first recording echo sounder and in 1935 a controlling interest in the company was acquired by S Smith & Son Ltd resulting in the development and production of marine and aircraft instruments. Following the London office's destruction in the Blitz of 1941, a collaboration was entered into with Kelvin, Bottomley & Baird Ltd resulting in the establishing “Marine Instruments Ltd”. Following the formal amalgamation of Kelvin, Bottomley & Baird Ltd and Henry Hughes & Sons Ltd in 1947 to form Kelvin & Hughes Ltd. Marine Instruments Ltd then acted as regional agents in the UK for Kelvin & Hughes Ltd who were essentially now a part of Smith's Industries Ltd founded in 1944 and the successors of S. Smith & Son Ltd. Kelvin & Hughes Ltd went on to develop various marine radar and echo sounders supplying the Ministry of Transport, and later the Ministry of Defence. The firm was liquidated in 1966 but the name was continued as Kelvin Hughes, a division of the Smiths Group. In 2002, Kelvin Hughes continues to produce and develop marine instruments for commercial and military. G. Falconer Company History: G Falconer (Hong Kong Ltd) appear to have had a retail presence in Hong Kong since 1885, according to the company website, and currently have a shop in the Peninsula Hotel. G Falconer was the Hong Kong selling agent for several British companies. Ross Ltd of 111 New Bond St London was one and the other was Kelvins Nautical Instruments. Falconers were primarily watchmakers, jewellers and diamond merchants.They were also agents for Admiralty Charts, Ross binoculars and telescopes, and sold English Silverware and High Class English Jewellery. In 1928 the company was operating from the Union Building opposite the Hong Kong general post office. It is unclear if the item is an original Sextant made by Kelvin prior to his amalgamation with Henry Hughes & Sons in 1941 as Kelvin appears to have only made compasses up to this date. If the Sextant can be established that it was made by Kelvin then it is very significant and a rare item made for and distributed through their Hong Kong selling agents G Falconer Ltd. There are many Sextants advertised for sale stating "Kelvin & Hughes 1917 model sextant". These can be regarded as replicas as the company was not formed until 1941 and production of marine instruments was not fully under way until after the war in 1947. Further investigation needs to be undertaken to accurately determine the provenance of this item. As the writer currently has the impression that the subject object was possibly made by Kelvin and Hughes in the mid to late 20th century or is a replica made by an unknown maker in the late 1970s. Purchased as an exhibition of marine navigational instruments for the Flagstaff Hill museum. The Sextant is a brass apparatus with filters and telescope lens, and comes with a wooden felt lined storage box. It is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.G Falconer and Co. Hong Kong (retailers of nautical equipmentflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant, kelvin & hughes ltd, hong kong, navigational instrument, g falconer, mariner's quadrants

Navigation Chart - The Melbourne Harbor Trust Commissioners - General Plan - Shewing proposed Harbor Improvements. Hobson's Bay and Citywarrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, navigation chart, hobson's bay, the melbourne harbor trust

British Admiralty Navigation Chart - North Atlantic : Route Chart showing Lane Routes South of Ireland & English Channelwarrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, navigation chart, british admiralty navigation chart, british admiralty, north atlantic route chart, north atlantic

British Admiralty Navigation Chart - China - Formosa Strait - Pescadores Islands Inner Anchorage, from a French Goverment Survey 1886warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, navigation chart, british admiralty navigation chart, british admiralty, pescadores islands inner anchorage

British Admiralty Navigation Chart - North-East Coast of New Guinea with Bougainville, New Britain, New Ireland & Admiralty Islandswarrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, british admiralty navigation chart, navigation chart, new guinea, bougainville, north-east coast of new guinea, new britain, new ireland, admiralty islands

British Admiralty Navigation Chart - North-East Coast of New Guinea with Bouganville, New Britian, New Ireland and Admiralty Islandwarrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, navigation chart, british admiralty navigation chart, british admiralty, new guinea

Over the years, Clarke & Smith retained the method of using a 'tapete' to store audio material, but changed the players to reflect improvements in technology (both audio and housing). This 'toaster' style model used a combination of components made at it's English factory and overseas suppliers. However compact discs were beginning to evolve and organisations, such as RNIB, wanted more versatility over playback machines.Plastic rectangular cream coloured audio player with buttons for navigational controls, power cord and 5 buttons (b/c 1010150)Clarke + Smithaudio equipment, clarke and smith

British Admiralty Navigation Chart - Philippine Islands - Cabra Island to San Fernando Point including Dilasak B. to St. Miguel B.warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, british admiralty navigation chart, navigation chart, cabra island to san fernando point, dilasak b. to st. miguel b., philippine islands

The ship's log part, called a fish, is likely to be from a mechanical taffrail log system. It was recovered from the wreck site of the barque, the 1840-1852 Grange. There are no marks on the fish to identify its maker or model. It is part of the John Chance Collection. This ‘fish’ is part of an early to mid-1800s ship's log. It would likely have been part of a taffrail log connected to a rotor (also called propeller, spinner) by a strong line, and the other end connected by a line to a dial mounted on the taffrail, or stern rail, at the stern of the vessel. As the propeller rotated through the water it would spin the log, which in turn would cause a number to register on the dial, showing the current speed in knots; one knot equals one nautical mile per hour. TAFFRAIL LOGS A taffrail log is a nautical instrument used for measuring the speed of a vessel, providing vital navigational information to be calculated, such as location and direction. A log has been used to measure the speed of a vessel since the 1500s. A simple piece of wood was tied to a long line and thrown into sea at the back of the vessel. The rope was knotted all along at equal distances apart. On a given signal the log line was pulled back into the vessels, the knots counted until the log came up, then the figures were calculated by a navigator In 1802 the first successful mechanical log available for general use was invented by Edward Massey. It had a rotor 'V' section connected to a recording mechanism. The water’s movement rotated the rotor, which intern sent the movement to the recorder. There are examples of this invention available to see in some of the maritime museums. Thomas Walker, nephew of Edward Massey, improved on Massey’s design, and Walker and his son took out a patent on the A1 Harpoon Log. In 1861. Both Massey and Walker continued to improve the designs of the taffrail log. New designs were still being introduced, even up to the 1950s. THE GRANGE, 1840-1858- The wooden barque ’Grange’ was a three-masted ship built in Scotland in 1840 for international and coastal trade. On March 22, 1858, the Grange set sail from Melbourne under Captain A. Alexander, carrying a cargo of ballast. The barque had left the Heads of Phillip Bay and was heading west along the Victorian coast towards Cape Otway. The ship struck Little Haley’s Reef at Apollo Bay due to a navigational error and was stuck on the rocks. The crew left the ship carrying whatever they could onto the beach. Eventually, the remains of the hull, sails and fittings were salvaged before the wreck of the Grange broke up about a month later. About 110 years later, in 1968, the wreck of the Grange was found by divers from the Underwater Explorers Club of Victoria. They were amazed to find a unique, six to nine pound carronade (type of small cannon) and a cannonball on the site. There have been no other similar carronades recorded. In that same year the anchor of the Grange was recovered by diver John Chance and Mal Brown. The ship’s log is significant historically as an example of hardware used when building wooden ships in the early to mid-19th century. The ship’s log is historically significant as an example of the work and trade of blacksmith. The ship’s log also has significant as it was recovered by John Chance, a diver from the wreck of the Grange in the 1968. Items that come from several wrecks along Victoria's coast have since been donated to the Flagstaff Hill Maritime Village’s museum collection by his family, illustrating this item’s level of historical value. The ship’s log is historically significant for its association with the 1840s wooden barque, the Grange. The Grange is an historical example of a Scottish built vessel used for international and coastal trader of both cargo and passengers in the mid-19th century. The Grange is an example of an early ship, designed with a wooden hull. It is significant as a ship still available to divers along the south coast of Victoria, for research and education purposes. The Grange is an example of a mid-19th century vessel that carried a weapon of defence onboard. Ship log fitting, called a fish; part of a brass navigational instrument, likely to be from a taffrail log. The metal is a tan colour and has rough surface with a sheen, and discolouration in places. Its basic shape is a hollow cylinder with ends tapering to a smaller size. In the centre there are opposing openings cut out, showing a rough texture inside. One end on the cylinder is closed with a ring and shank installed, fixed by an embedded screw through the end of the cylinder. There are no inscriptions.flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, west coast trader, apollo bay, mid-19th century shipwreck, the grange, scottish barque, little henty reef, captain a alexander, underwater explorers club of victoria, vhr 5297, coastal trader, wooden shipwreck, john chance, wooden ship, taffrail log, marine instrument, marine technology, navigation, nautical instrument, mechanical log, nautical navigation, navigation equipment, scientific instrument, ship log, ship log register, ship speed, taff rail log, patent log, towed log, taffrail log fish, edward massey, thomas walker

From the collection of "Maxwell Lennox Matheson" No.418447 RAAF. Enlisted 22/5/1942 Aged 19. Discharged 19/2/1948 - Rank FLTLT.This map is in colour. It is made of a stiff paper and has a map printed on both sides. Side1 - scale 1:2,315,000. 31.72 Nautical miles = 1 inch. It shows Eastern half of New Guinea. It also shows New Britain and New Ireland. Manus Island is at the top. Side 2 - Scale 1:1,000,000 - this shows Manus Island on right side, top of New Guinea at bottom edge (Wewak) and some other little islands. The map on side 1 has numerous navigation tracks and calculations in pencil. i.e. LAE, KOKODA, PORT MORESBY.ww2, raaf, new guinea

In the early 1920s Australia was gifted six J class submarines from the Royal Navy. These were the latest and largest submarines built by the RN for service in World War I. They were competent but were in service with the Royal Navy for only a short time before the end of the war. Once in Australia they were placed into service but there was little appetite for submarines or in fact any other military endeavour in the early ‘twenties’. The world was exhausted from a long and dirty war followed by a devastating Influenza Epidemic. The J class boats were soon retired and sunk as breakwaters or scuttled in the ship graveyard area off the mouth of Port Phillip Bay.Popular diving sites in Ships Graveyard outside the rip between Point Lonsdale and Barwon HeadsCircular brass plaque inscribed with J5 North Sea 1917 1918 made from a piece of navigational equipment used on the submarine J5 mounted on woodSubmarine J5 North Sea 1917 - 1918j class submarines, j5, ships graveyard, port phillip

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

Alien Tax Receipt, dated 30/3/37. Matson Navigation Co.-The Oceanic Steamship Co. Received from Mr. R. H. S. Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, alien tax receipt, matson navigation co, the oceanic steamship co, r h s abbott, clayden

APH began producing it's own line of products to satisfy it's clients, outsourcing the manufacturer to overseas companies. This talking book machine, had an optional carry case, and dials to control tone, volume, speed, front buttons to record, rewind, forward, play, and stop tape. Playing both 2 and 4 track tapes, it also had Braille signs next to some of the buttons.Plastic rectangular light brown audio player with buttons for navigational controls, power cord, outlets for ear or head phones and black vinyl protective zip up cover Model no. 3-5194A.audio equipment, royal victorian institute for the blind

Breakwater navigation lights are placed at the end of the breakwaters to warn incoming vessels of the end of the structure, as a marine safety measure. The subject item was such a light believed to have been placed at the end of Warrnambool's breakwater around 1915 when it was extended. The light had remained in place for many years until it was probably removed when the structure was undergoing rock armouring repairs to the end of the breakwater in 1975. The light had been placed in a council storage shed probably from the time when the structure was undergoing these repairs in 1975. In 2014 the light was removed from the storage shed and donated to Flagstaff Hill museum. History: Warrnambool breakwater plans were drawn up by 1874 and approval was given for preliminary construction work to start but when the money ran out, the works stopped. With a number of quick changes of government the “Warrnambool” breakwater project was kicked from one Victorian state government to another. Then finally in 1879, the eminent British harbour engineer Sir John Coode was asked to design a breakwater. His first design was for a 1800 feet long structure but that was scaled back to 900 feet and construction finally began in 1884. This structure was attributed in causing major siltation of Lady bay, as a consequence the breakwater was again extended in 1915. In 1975, the rock armouring at the end of the breakwater was added but by 1979 another impact study was calling for the breakwater to be removed altogether. The Heritage Council Victoria, regard the Warrnambool breakwater is of historical significance to the state as one of the most important maritime engineering projects that was undertaken in Victoria during the late nineteenth century. The light is also as part of this structure regarded as a significant item of historical interest.Marker light or navigation light. Round light stand with conical top piece (2 separate pieces). Metal base painted red, clear glass middle section enclosed by metal frame, metal cone shaped top section painted silver. Electrical wiring can be seen inside centre section. Pole that light would have been on to elevate it is missing.Has metal plate screwed onto side of base engraved "23". flagstaff hill, warrnambool, shipreck coast, flagstaff hill maritime museum, maritime museum, great ocean road, warrnambool breakwater, marker light, naviagtion light, breakwater navigation light

Book, titled “Orient Line Guide, Charters for Travellers by Sea and by Land”. Illustrated Guide of the Orient Line of Steamers between England and Australia. Issued on behalf of the Orient Steam Navigation Company Limited and the Pacific Steam Navigation Company, by the managers of the line, F. Green & Co. – Anderson, Anderson & Co. London, Contract with the Government of New South Wales. Brown leather and cloth cover with gold lettering and fine gold floral decoration. flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, charters for travellers orient line guide, book, steam ship travel, passage from england to australia, orient steam navigation company limited, pacific steam navigation company, f. green & co. – anderson, anderson & co, e.c. maclure m macdonald

Also black and white copy 20 x 13.5 cmSepia photograph showing flagstaff with navigation baskets on dunes at entrance to Gippsland Lakes. Two smaller baskets above yardarm, two larger baskets below yardarm. Lakes Entrance Victoriajetties, coast

Date made September 2005Colour photograph of the RMIT TAFE Educational Facility on Bullock Island, taken from Cunninghame Arm. In the background is the navigation lights on Jemmys Point and residence on Kalimna Heights. Lakes Entrance Victoriaislands, education, waterways

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

British Admiralty Navigation Chart - Islands in the North Pacific (Western Hawaiian Group) : Midway Islands, Seward Road and Welles Harbour, Necker Island, Cure or Ocean Island, Pearl and Hermes Reefwarrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, navigation chart, british admiralty navigation chart, midway islands, islands in the north pacific (western hawaiian group), seward road, welles harbour, necker island, cure or ocean island, pearl and hermes reef

Black and white photograph of the steamer Gippsland at Nyerimilang Jetty, Gippsland Lakes. Jetty has navigation light but no storage shed at this time. Three smaller boats moored at jetty. Lakes Entrance Victoriaislands, waterways, topography, parks

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

Black and white photograph showing piers and entrance to lakes from ocean Bass Strait. Western pier in back ground shows concrete extension to original wooden pier. Wooden eastern pier in foreground. Lakes Entrance Victoriajetties, navigation