Underwater navigation device

Geometrical instruments – Indicator of direction of force traversing natural media – Combined

Patent

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Details

33352, 33333, 33370, 2430, G01C 1708, G01C 912, G01C 2300

Patent

active

051878712

ABSTRACT:
A navigation device for personal use includes a face mask with a transparent window for binocular vision when the device is worn by the user. The face mask has a directional indicator attachement with a multiplicity of symbols to identify the directional orientation of the mask. The directional indicator is attached at a stable location and distance for continuous availability of direct binocular viewing.

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patent: 4141152 (1979-02-01), White
patent: 4670988 (1987-06-01), Baxter
patent: 4953304 (1990-09-01), Raitman et al.

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