Alidade
Graduations-Upper surface of bar graduated with six lines; 24-100, 20-100, 16-100, 12-100, 11-100 and 10-100. Reverse side of bar carries a diagonal scale.
Sights-There are brass strips at either end of bar for attaching sight vanes.
Sights-There are brass strips at either end of bar for attaching sight vanes.
Object Details
ID: | NAV1364 |
---|---|
Type: | Alidade |
Display location: | Not on display |
Creator: | Allen, Elias |
Date made: | circa 1620 |
Credit: | National Maritime Museum, Greenwich, London |
Measurements: | 3 mm x 508 mm x 45 mm |
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