Diagram to facilitate the plotting of dead reckoning position lines and other navigational problems together with a scale to enable the framework to be graduated for latitude and longitude for any given scale without the use of charts. Designed by Captains JA Webster MVO and HP Douglas RN. Sold by JD Potter, Agent for the Sale of the Admiralty Charts, 145 Minories
No scale. Black and white chart. Two compasss roses. Latitude and longitude scale and instructions of use. Canvas backed chart.
Object Details
| ID: | G298:4/17(1) |
|---|---|
| Collection: | Charts and maps |
| Type: | Chart |
| Display location: | Not on display |
| Creator: | HM Admiralty |
| Date made: | 1918 |
| Credit: | © Crown copyright. National Maritime Museum, Greenwich, London |
| Measurements: | Sheet: 71 cm x 101.5 cm |
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