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. A brass cylinder enclosing nine magnets 9" x 3/8". These were attached beneath the bucket in the binnacles of certain ships where it was found that the ordinary nine magnets were insufficient to correct heeling error.
1918
National Maritime Museum

. Bowl: Grey painted brass, filler plug at side and four side expansion chambers fitted. Bottom of bowl glazed, for illumination and projection of card. Inside of bowl painted white and fitted with black wire lubber point projecting from side of bowl. Mo
1918
National Maritime Museum

. Gun-sighting telescope objective lens cap
1918
National Maritime Museum

. Liquid compass Bowl: Grey painted brass, filler plug at side, and expanding glazed bottom for illumination from below. An azimuth circle of the large prism type is fitted being supplied with tripod at centre to carry a shadow pin ( five shadow pins are
1918
National Maritime Museum

. Liquid compass Bowl: Grey painted brass, filler plug at top expansion chamber at rear. Inside of bowl painted white. Radium covered wire lubber line mounted under verge glass, extending from top to bottom. Mounted in a vertical metal ring dia. 8.75 ( 22
1918
National Maritime Museum

. Liquid compass Bowl: Grey painted brass, filler plug on side. Brass verge ring, graduated to 360 degrees anti-clockwise. Fitted with two lubber pointers, one marked "H" the other "O" and four other pointers which move independently o
1918
National Maritime Museum

. Liquid compass Card Mica, painted black with white markings, graduated to 360 degs. At centre is a high-domed aluminium float, having inverted pivot point in base. Two heavy magnets of circular section mounted below card either side of float.
1918
National Maritime Museum

. Liquid compass. Bowl: Grey painted brass, two filler plugsat side, expansion chamber at base. Inside of bowl painted white. Lubber line consists of a black line painted on a bracket whcih forms part of the bridge at base of bowl to whcih pivot stem is s
1918
National Maritime Museum

. Protractor for star identifier.
1918
National Maritime Museum

. The first experimental model of a liquid aperiodic compass designed and patented by Lieutenant Commander Colin Campbell, RN, and Dr G T Bennett, FRS, in 1918. This model was made up at the Compass Observatory from an old Pattern 200 compass and was trie
1918
National Maritime Museum

. This achromatic telescope was made for military use as a gun-sighting telescope. It is made of brass and focuses by rotating the eyepiece end. Cross hairs, visible when viewing through the telescope, allow for accurate sighting. There is an objective le
1918
National Maritime Museum

Explanations & Examples to Accompany Star Identifier. Booklet for star identifier.
1918
National Maritime Museum

McGegan Star Identifier. Star identifier. Dryad list describes it as a McGegan Star Identifier.
1918
National Maritime Museum

Pocket sextant. The sextant consists of circular brown-lacquered brass plates and a lid with a bayonet fitting that when attached to the back of the instrument serves as the handle. The lid has a brass handle, and contains a paper table for natural tangen
1918
National Maritime Museum

RAF Mark II. Liquid compass The remains of a Mk II compass recovered from a machine which crashed and was burnt out in France in 1918. Consists of empty shattered copper bowl, spherical. O.A. dimensions 5.0" (12.7cm)
1918
National Maritime Museum

Type 6/18. Aperiodic compass attached to a wooden stand Bowl: Brass, painted black. Filler plug at side, expansion chamber at base of bowl. Mounted on three legs fitted with pin and helical spring suspension. Inside of bowl painted white. Fixed arrow line
1918
National Maritime Museum

Type 6/18. Liquid compass Bowl: Brass, inside painted white , expansion diaphragm attached to base. Filler plug and electric lamp fitting on side of bowl. Verge glass carries a fixed arrow inside the bowl. The bar which carries the arrow carries a cup to
1918
National Maritime Museum

. A plotting intrument for air navigation that orginally consisted of three parts: a circular plastic disc approximately 150mm in diameter with a square grid drawn on it; a circular plastic disc approximately 150mm in diameter, marked in degrees from 0 to
about 1918
National Maritime Museum

. These prismatic binoculars have a leather-covered body (of which much of the leather is now missing) and two loops for a carrying strap, now missing. There is also a canvas cap for the eyepieces, held on with metal springs. The two eyepiece tubes are fo
about 1918
National Maritime Museum

. Liquid compass Card: A mica band 1" (2.5 cm) wide attached to needles by a wire framework. The card is white with black markings graduated to quarter points and from 0 - 360 Needle: The four needles, in two pairs, are each held in metal tubes a
May 1918
National Maritime Museum

. Liquid compass Card: A dished metal card attached to the needles. The card is white with black markings graduated to quarter points. Needle: The two needles are each enclosed in metal tubes and are attached to both the card and the float. Length 3
Dec 1918
National Maritime Museum