Lay all flat Aback, the order to arrange all the sails in this situation.

ABAFT, arriere, (abaftan, Sax. behind) the hinder part of a ship, or all those parts both within and without, which lie towards the stern, in opposition to afore; which see.

Abaft, arriere de, is also used as a preposition, and signifies further aft, or nearer the stern; as, the barricade stands abaft the main mast, i. e. behind it, or nearer the stern.

ABOARD (à bord, Fr. abordo, Ital.) the inside of a ship: hence any person who enters a ship is said to go aboard: but when an enemy enters in the time of battle, he is said to board. A phrase which always implies hostility. See the article Boarding.

To fall Aboard of, aborder, to strike or encounter another ship, when, one or both are in motion; to be driven upon a ship by the force of the wind or current.

Aboard-main-tack! amure la grande voile! the order to draw the main-tack, i. e. the lower corner of the main-sail, down to the chess-tree. See Chess-tree.

ABOUT, reviré, (abutan, Sax.) the situation of a ship immediately after she has tacked or changed her course by going about, and standing on the other tack. See Tacking.

About-Ship! adieu-va! the order to the ship’s crew to prepare for tacking.

ABREAST, par le travers (of breost, Sax.), side by side, or opposite to; a situation in which two or more ships lie, with their sides parallel to each other, and their heads equally advanced.

This term more particularly regards the line of battle at sea, where, on the different occasions of attack, retreat, or pursuit, the several squadrons, or divisions of a fleet, are obliged to vary their dispositions, and yet maintain a proper regularity by sailing in right or curved lines. When the line is formed abreast, the whole squadron advances uniformly, the ships being equally distant from, and parallel to each other, so that the length of each ship forms a right angle with the extent of the squadron or line abreast. The commander in chief is always stationed in the center, and the second and third in command in the centers of their respective squadrons. See this farther illustrated in the article Line.