AUTUMNAL EQUINOX. The time when the sun crosses the equator, under a southerly motion, and the days and nights are then everywhere equal in length. (See [Libra].)
AUTUMNAL POINT. That part of the ecliptic whence the sun descends southward.
AUTUMNAL SIGNS. Libra, Scorpio, and Sagittarius.
AUXILIARIES. Confederates, an assisting body of allies; or, physically speaking, vessels using steam as an auxiliary to wind.
AUXILIARY SCREW. A vessel in which the screw is used as an auxiliary force. Such a vessel is usually fully masted for sailing purposes.
AVANIA. The fine or imposition imposed on Christians residing under Turkish governors, when they break the laws.
AVANT-FOSSE. In fortification, an advanced ditch without the counterscarp, and stretching along the foot of the glacis.
AVAST. The order to stop, hold, cease, or stay, in any operation: its derivation from the Italian basta is more plausible than have fast.
AVAST HEAVING! The cry to arrest the capstan when nippers are jammed, or any other impediment occurs in heaving in the cable, not unfrequently when a hand, foot, or finger, is jammed;—stop!
AVENTAILE. The movable part of a helmet.