Nautical words

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Ascensional Difference. Difference between the right ascension and oblique ascension of a heavenly body.

Ascension Verse. French equivalent for the British 'Sidereal Hour Angle'.

Ascertained. As used in 'Collision Regulations', has been ruled as meaning 'determined distinctly and unequivocally'.

Ascians. People living in regions where, at some time, they have no shadow: thus living between tropics of Cancer and Capricorn.

Asdic. Device for detecting submerged submarines, and ascertain­ing their distance and direction, by making a sound signal in water and timing interval until return of echo. Name is taken from initials of 'Allied Submarine Devices Investigation Commit­tee' of 1914-18 war. Now called Sonar.

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