Movable disc enables magnetic variation to be set on the instrument and a movable arm is divided into millimetres. With Captain Fields' protractor markings. Comfortably covers the largest Admiralty Chart with pencil guide holes give precision loction. Unique design ensures a truly parallel action and special "slip and grip" gives ease of use. Manufactured from clear acrylic, 400mm in length.
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|London Store||1 in stock|
|Bristol Store||Out of stock|
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