The mast of this vessel, a a, fig. 2. plate [V]. is extremely high, and withal properly strengthened by shrouds and stays, in order to secure the sheers, machine à mater, which serve, as the arm of a crane, to hoist out or in the masts of any ship lying alongside. The sheers, b b, are composed of several long masts, whose heels rest upon the side of the hulk, and having their heads declining outward from the perpendicular, so as to hang over the vessel whose masts are to be fixed or displaced. The tackles, c c, which extend from the head of the mast to the sheer-heads, are intended to pull in the latter towards the mast-head, particularly when they are charged with the weight of a mast after it is raised out of any ship, which is performed by strong tackles depending from the sheer-heads. The effort of these tackles is produced by two capsterns, fixed on the deck for this purpose.
Hulk is also a name bestowed on any old vessel laid by, as unfit for further service: it is probably derived from the ολκαδες, or vessels of burthen of the ancient Grecians.
HULL, corps d’un vaisseau, the frame, or body of a ship, exclusive of her masts, yards, sails, and rigging: it is usually expressed of a ship either before she is furnished with masts, &c. or after she is dismasted and stripped of the aforesaid machinery.
To Hull a ship, is to fire cannon-balls into her hull within the point-blank range.
Hull-to, the situation of a ship when she is trying a-hull, or with all her sails furled; as in trying. See the article Trying.
HURRICANE, ouragan, (huracan, Span.) a violent and prodigious tempest, occasioned by the collection and opposition of several winds, that sometimes blow from one quarter and sometimes from another, producing a dangerous agitation in the sea, where the waves break, and dash against each other with astonishing fury. On the approach of a hurricane, the sea and air become perfectly calm and motionless, without a breath of wind stirring either. Soon after this the sky is darkened, the clouds accumulate, and the light of the day is replaced by terrible flashes of lightening. The hurricanes often last abundantly long, and are usually accompanied with many fatal accidents[[35]]. During the continuance of this general calamity, the vessels which were anchored in the roads frequently cut their cables and put to sea, where they drive at the mercy of the winds and waves, after having struck their yards and top-masts.
The hurricanes are more usual between the tropics, particularly in the Atlantic ocean, than to the northward or southward of the torrid zone.
J.
JACK, a sort of flag or colours, displayed from a mast erected on the outer end of a ship’s bowsprit. In the British navy the jack is nothing more than a small union flag, composed of the intersection of the red and white crosses; but in merchant ships this union is bordered with a red field. See the article Union.
JAMMING, the act of inclosing any object between two bodies, so as to render it immoveable, whilst they continue in the same position. This expression is usually applied to the situation of some running-rope, when it happens to be squeezed by the compression of the standing-rigging, &c. and by consequence incapable of performing its office, by traversing in the blocks, till it is released from this confinement. In this sense jamming is opposed to rendering, which see.