Alidade

Graduations: Upper surface of bar graduated 0-12 with a diagonal scale. One edge graduated "M.P. Venc" 1-6, M.P. /viceno." 0-6, "M.P. Vere." 0-6.
Sights: Two hinged sight vanes 6.1" (15.4cm) long. One sight vane has a vertical slit with rectangular aperture above, the other has a rctangular aperture with avertical slit above.

Object Details

ID: NAV1361
Type: Alidade
Display location: Not on display
Creator: Rodella
Date made: circa 1750
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Overall: 35 mm x 584 mm x 46 mm