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. Base of the box for the pivots.
Unknown
National Maritime Museum

. Bowl-Copper with brass ring at top, pronounced swell at lower end to accommodate the ends of the needle. Fitted with glass at top and bottom. Top glass marked with arrow. Card lifter is fitted, operated by screw mechanism. Set in brass gimbal rings, fou
1848
National Maritime Museum

. Bowl-Copper with brass ring at top. Set in complicated gimbal arrangement which has very large lead weight at bottom. Two crude lubber lines marked on inside. Card- Mica covered with paper. Black with white markings graduated to 1/4 points. This is gra
1848
National Maritime Museum

. Bowl: Brass painted black. Has stop mechanism on side. Two release screws so that glazed top verge and azimuth circle can be released. Verge has 4 cardinal points marked in degrees, 0 - 90 - 180 - 270 - Inside bowl metallic with black lubber line. Sto
1848
National Maritime Museum

. Card-Mica painted light grey with black markings, graduated to 1/4 points. Has decorated N & E points. At centre of card is a hole 1.1" (2.8cm) diameter and two slits 2.25" (5.8cm) long to the N & S points, which accommodate the unusu
1848
National Maritime Museum

. Dry card compass box
Unknown
National Maritime Museum

. Fragment of strap from the tripod
Unknown
National Maritime Museum

. In 1848, David and James Napier took out a patent for a type of compass which kept a permanent record of the direction of the ship's head, as indicated by the compass needle. A circle of squared paper was placed over the compass card and a clockwor
1848
National Maritime Museum

. Key for the dry card compass box
Unknown
National Maritime Museum

. Lid of the box for the pivots.
Unknown
National Maritime Museum

. Two pivots.
Unknown
National Maritime Museum