sort of marine punishment, inflicted by the French, on those who have been convicted of defection, blasphemy, or exciting sedition. It is performed as follows: The criminal is placed astride of a short thick batten, fastened at the end of a rope, which passes through a block hanging at one of the yard-arms. Thus fixed, he is hoisted suddenly up to the yard, and the rope being slackened at once, he is plunged into the sea. This chastisement is repeated several times conformable to the purport of the sentence pronounced against the culprit, who has at that time several cannon shot fastened to his feet during the punishment; which is rendered public by the firing of a gun, to advertise the other ships of the fleet thereof, that their crews may become spectators.

Ducking is also a penalty which veteran sailors pretend to inflict on those who, for the first time, pass the tropic of Cancer, the equator, or the straits of Gibraltar, in consequence of their refusal or incapacity to pay the usual fine levied on this occasion.

Ducking-Stool. See Castigator.

Duckup, at sea, is a term used by the steerer-man, when the main-fall, fore-fall, or sprit-fall, hinders his seeing to steer by a land-mark; upon which he calls out, Duckup the clew-lines of these sails; that is, haul the falls out of the way. Also when a shot is made by a chase piece, if the clew of the sprit-fall hinders the sight they call out, Duckup, &c.