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c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter
  • c1965 Admiralty Decca Navigation Co Astroplot Star Plotter

c1965 Admiralty Decca Navigation Co Astroplot Star Plotter

Price:

£150.00


Product Description

A very nice clean example of a c1962 Admiralty Pattern No85 Star plotter.

It is made for the Navy by the Decca Navigation Company Ltd, of London, and has a serial number: 210/DN/65. Called the Astroplot it is a device to assist rapid plotting of the results of Rapid Sight Reduction, without the aid of a parallel rule or dividers. The Astroplot is engraved with a scale of 5 miles to 1 inch. The baseplate is constructed of a white plastic called Bexoid and consists of a rotating disc with 360 degrees around its circumference. The face of the disc is marked with 2 mile squares. On top of it rests the Plotting surface, which is a rectangular perspex sheet. There is also bexoid strip, on which a time scale can be drawn, being adjustable. It passes through slots on the East and West sides of the plotting surface. Finally, there is a Perspex Altitude ruler, marked in minutes of altitude and fitted with a cursor for setting the altitude for any selected four-minute period. The star plotter is in fitted wooden case with carrying handle.

Condition is good, with just some tearing to the baize under the plotter.

Size: 51 x 42 x 5.5 cm (20 x 16 ½ x 2 1/8 inches)
Weight: 3995g

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