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Measures altitude, up to 15,000 ft., and barometric pressure. Perfect for use as a navigation aid, o...

Measures altitude, up to 15,000 ft., and barometric pressure. Perfect for use as a navigation aid, o...

Full size marine compass. Rugged rubber housing with adjustable hood. Unique V-shaped bottom fits cu...

Altitude and barometric pressure at your fingertips. Handy aluminum carabiner clips on anywhere. Ran...