William Falconer,
An Universal Dictionary of the Marine
“ TRIPPING, the movement by which an anchor is loosened from the bottom by its cable or buoy-ropes. See Atrip.TROUGH, a name given to the hollow, or interval between two high waves, which resembles a broad and deep trench perpetually fluctuating. As the setting of the sea is always produced by the wind, it is evident that the waves, and consequently the trough or hollow space between them, will be at right angles with the direction of the wind. Hence a ship rolls heaviest when she lies in the trough of the sea. ”
