Royal Navy Issue Stuart's Marine Distance Meter Pattern AP498 by H. Hughes & Son Limited, London, England. Serial number 11836. In original fitted wooden case. This instrument is used to determine the distance of another ship and so was particularly useful for ships sailing in convoy to ensure that they remained far enough apart. The distance meter has a white metal scope. The top scale is marked ‘CABLES’ and has a scale from 1 to 30. The meter works on the double image principle. To use it, the observer sets the height scale to the known height of the ship being observed, then looks though the eyepiece and turns the knob on the front until the two images seen through the eyepiece coincide. The distance of the ship from the observer is then indicated on the scale marked ‘CABLES’. Measurements Overall: 105 mm x 130 mm x 87 mm Great original piece with all glass intact some minor dents and marks commensurate with age. Please see all photos as these form part of the description
This exceptional item will make a great display piece for nautical decor.
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