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 |