Hooker A term describing any older vessel - also a small two-masted craft such as an Irish Galway Hooker
Horns Protrusions on the sides of a rudder to prevent it turning beyond an allowable angle
In Irons A sailing craft caught dead to wind and unable to fill her sails on a new tack
Isobar A line of equal barometric pressure on a weather map
Jack A small flag flown at the bow, correctly flown only when not underway
Jackass A plug for a hawsepipe
Jacobs Ladder The type of ladder used as a "Pilot's Ladder"
Jews Harp A shaped shackle for stock anchors
Jigger The name of a fore-aft sail rigged aft on the mizzen mast
Jumbo Name of the heavy lift derricks of 100 tonnes or more seen on breakbulk cargo ships
Jury A temporary or makeshift arrangement repairing damage
Keckling Old line served around the rope anchor cable before chain cables
Kenning Term for the distance (about 20 miles) from which high land could be sighted at sea. Kennen sketches were common on the British Admiralty (BA) coastal charts.
Kentledge Inboard ballast (¡¡does not include useless crewmembers!!)
Kevel A large cleat or pair of bitts in sailing vessels
Killick A simple anchor - also the nickname of a British Royal Navy Leading Rate as it is his rating insignia
Kippage All the apparel and personnel of a vessel
Knock Off Stop all work or whatever task is at hand
Good timing - lets knock off for now.
Some 400 of our fellow seafarers are still being held captive by pirates off the coast of Somalia. Let us work to bring them home.