ORIGIN. Merchant ships claiming benefit for importation, must obtain and produce certificates of origin, in respect to the goods they claim for. (See [Production].)
ORIGINAL ENTRY. The date at which men enter for the navy, and repair on board a guard-ship, or tender, where bedding or slops may be supplied to them, and are forwarded with them to their proper ships.
ORILLON. In fortification, a curved projection formed by the face of a bastion overlapping the end of the flank; intended to protect the latter from oblique fire; modern ricochet fire renders it of little consequence.
ORION. One of the ancient constellations, of which the lucida is the well-known nautical star Betelgeuze.
ORISONT. The horizon; thus spelled by our early navigators.
ORLOP. The lowest deck, formerly called "over-lop," consisting of a platform laid over the beams in the hold of ships of war, whereon the cables were usually coiled, and containing some cabins as well as the chief store-rooms. In trading vessels it is often a temporary deck.
ORLOP-BEAMS, or Hold-beams. Those which support the orlop-deck, but are chiefly intended to fortify the hold.
ORNAMENTS. The carvings of the head, stern, and quarters of the old ships.
ORNITHÆ. An ancient term for the periodical winds by which migratory birds were transported.
ORTHODROMIC. The course which lies on a meridian or parallel.