Catenary

catenary - The sag in a line strung between two points.
caulking - Material used to seal the seams in a wooden vessel, making it watertight.

Catenary The curve of an anchor cable as it lies between the anchor on the sea bottom and the vessel which lies to it.
Cathead A heavy piece of curved timber projecting from the bow of a ship for the purpose of holding anchors.

catenary - A "gravity induced" rope sag between two points.
cathead - Timber or iron projection from the how of a vessel by which the anchor is hoisted up to the rail, after it has been weighed to the hawse pipe.

Catenary:
The curve (sag) of a rope, cable or chain hung between two points such as the anchor rode or towing line; the deeper the curve, the more catenary.

Catenary - The sag in a line strung between two points such as the anchor line.
Calk to fill wooden vessel seams with oakum and cotton using caulking irons and hammer ...

An anchor sentinel (weighted dolly, kellet) is a weight slid partway down the anchor rode in order to increase the anchor's catenary, or sag, which improves the anchor's holding power.

See also: Deck, Chain, Lines, Keel, Point