Marine computer

Details Marine computer Marine computer

1980-03-13

1982-05-04

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

With straight edge instrument or chart

33 1SD, 33431, 235 61NV, G01C 2122

Patent

active

043274978

ABSTRACT:
A graphic vector plotting instrument, particularly suited for marine navigational computations. A cursor disk is surrounded by a concentric compass disk, and both are rotatable about their common center. The cursor disk has a pair of perpendicular cursor lines which intersect at the common center and a plurality of other parallel cursor lines. The compass disk has a 360.degree. compass rose scale thereon. A transparent plotting slide is slidable over the cursor disk and the compass disk and contains scaled markings permitting the plotting and solution of navigational vector problems thereon without the aid of other devices or surfaces or charts.

REFERENCES:
patent: 1937831 (1933-12-01), McCollum
patent: 2415277 (1947-02-01), Caston
patent: 2916207 (1959-12-01), Vohland
patent: 2991555 (1961-07-01), Cambiaso
patent: 3526963 (1970-09-01), Pansmith
patent: 3983630 (1976-10-01), Hamm et al.

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