Nautical clock apparatus and methods

Details Nautical clock apparatus and methods Nautical clock apparatus and methods

1994-12-13

1996-11-26

Roskoski, Bernard

Horology: time measuring systems or devices

Astronomical

With tide display

G04B 1926

Patent

active

055792898

ABSTRACT:
An improved nautical clock apparatus of this invention is comprised of a clock base, a tide state indicator attached to the base, and an electronic controller attached to the tide state indicator and to the base for operating the tide state indicator to continuously indicate a time between successive like tide states based on a set time interval therebetween of about 12 hours and 25.235 minutes adjusted such that the time is longer than about 12 hours and 25.235 minutes during at least one portion of each lunar month and shorter than about 12 hours and 25.235 minutes during at least one other portion of each lunar month.

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A Jewelers Circular-Keystone (JC-K) (Pulsar Time), p. 87 (Mar. 1988).
P. Schureman, U.S. Department of Commerce, Manual of Harmonic Analysis and Prediction of Tides, Special Publication No. 98, pp. 126-129 & 308 Waves, Tides and Shallow-Water Processes, p. 57.

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