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This is a specimen of the manner in which sea charts are commonly drawn, by help of the sides of a regular poligon, shewing the points of the compass card. The corners of the poligon being joined, do become the points & subdivisions of the compass.
Single sheet, engraving. Scale [circa 1:3,000,000]. The scale is in leagues.This is an ungraduated chart with rhumb lines. Soundings, rocks and sandbanks are shown.
A page from an unidentified instruction manual.
A page from an unidentified instruction manual.
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Object details
| ID: | G223:1/47 |
|---|---|
| Collection: | Charts and maps |
| Type: | Chart |
| Display location: | Not on display |
| Creator: | Anonymous |
| Places: | English Channel |
| Date made: | 18th century? |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Printed area 19 x 27cm, on sheet 26 x 33cm. |