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Alidade
alidade
A heavy brass painted grey, alidade with a wide cross piece which holds spigot to fit into compass and a locking lever. The fore sight is an open arch with nylon thread. There is also a jet reflector and mirror for celestial sightings. Back sight contains slit and peep hole also contains prism and shades.
For use on small repeaters associated with Plath and Patin transmitting magnetic compasses.
(see ACO2524 and ACO 548)
O.A. Height 6.5" (16.5 cm)
A heavy brass painted grey, alidade with a wide cross piece which holds spigot to fit into compass and a locking lever. The fore sight is an open arch with nylon thread. There is also a jet reflector and mirror for celestial sightings. Back sight contains slit and peep hole also contains prism and shades.
For use on small repeaters associated with Plath and Patin transmitting magnetic compasses.
(see ACO2524 and ACO 548)
O.A. Height 6.5" (16.5 cm)
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Object Details
| ID: | ACO0820 |
|---|---|
| Type: | Alidade |
| Display location: | Not on display |
| Creator: | Plath, C. |
| Date made: | circa 1940 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 100 mm x 170 mm x 95 mm x .95 kg |