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.

An image showing 'G223:1/47 specimen chart, anon'

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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.

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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.