RAAF Manual navigation aircraft calculator(early computer)General issue to allied pilots and navigators for airspeed,altitude,air temperature and drift calculations.Black metal box with SS flap-top cover, moulding and straps for knee attachment.Engraving No. 19, Ident.No. G6B/145. I.C.A.N. Serial No. WG/1716*. Computer Navigational Mk.IIID

The Marine Safety Act, Victoria requires that lights must be displayed from sunset to sunrise and in times of restricted visibility during daylight hours. A vessel's lights should indicate: what type of vessel it is, what the vessel is doing, the direction that the vessel is travelling in. E.G. For vessels under 50 m in length, a second masthead light is optional. For vessels under 12 m in length, sidelights may be a combined lantern on fore and aft centreline. Every vessel at sea must show light to indicate type of vessel, directionof travel and speed.Three metal navigational lights; red port, green starboad and clear head light. S/N Side Light (red) Elect. S/N 432 Side Light (Green) Elect. S/N 433 Head Light Elect.navigation light, marine safety, navigation, safety equipment

One varnished teak board plaque from the Australian Institute of Navigation with a metal enamelled emblem of AustraliaPresented to Howard Smith Industries P/L in appreciation of your continuing support December 1995 Australian Institute of Navigation Another Hamilton Design the corporate award specialist ph: 026744266 fax: 026744758

A Fresnel lens is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use primarily in lighthouses.  Made from high-quality glass Fresnel lenses were used originally in lighthouses and later for many other applications They were later being used for automobile headlamps, brake, parking, and turn signal lenses, and many other applications. Fresnel lenses used in lighthouses were considered state of the art from the late 19th through to the middle of the 20th century. The subject item is a Fresnel replacement lens used in a ships navigation light. For lighthouses, these lenses have now been replaced with much less expensive and more durable aerobeacons, which themselves often contain plastic Fresnel lenses. The lens design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The catadioptric form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source making the light visible from greater distances.The subject item at this time cannot be associated with a historical event, person or place, provenance is unknown, the item is a replacement for a ships navigation light and it is believed to have been produced before 1950.Fresnel round glass masthead replacement lens for a navigation lamp of a ship. Nonewarrnambool, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, fresnel lens, maritime light, ships navigation light, augustin-jean fresnel, lighthouse lenses, lighthouse, navigation, warning light

Part of the crockery used on the "S.S.Casino" one of the Belfast and Koroit Steam Navigation Company ships used on the Melbourne-Port Fairy -Portland run. Sank in 1937 in Apollo Bay.Bowl: large white soup bowl with the inscription of the Belfast & Koroit Steam navigation Company"Belfast & Koroit S N Co Ltdlocal history, domestic items, crockery, belfast and koroit steam navigation company, s.s.casino

Red with gold lettering on spinenon-fiction

non-fictionswire, john swire, shipping companies

WWII History7 x Military Training Pamphlets, soft covered.Written guidelines to training in WWII

Produced by the United States Navy during 1940. While the Second World War had broken out, the United States where yet to joinworld war two, united states navy, aircraft navigation