Glossary Archive

Lines attached to clew of headsail to control sail shape.

This signal is also used to transition from letters to numbers when communicating a message.

International Morse Code sequence representing the letter J.

A specialised man overboard recovery device designed to provide buoyancy and visibility to a person in the water.  A Jonbuoy is a self-contained, inflatable man overboard (MOB) recovery system used on yachts and other vessels to assist in rescuing a person who has fallen into the water. Typically stored in a compact canister mounted on...

Pronounced: JOO-lee-ETT The term for the letter J in the NATO Phonetic Alphabet. Did you know?Juliett is deliberately spelt with two t's to ensure that French speakers don't mistake the t as silent.

A temporary but effective device that replaces lost or damaged gear

A gravity-driven wind that flows downhill from elevated terrain, such as glaciers or high coastal cliffs, typically bringing colder, denser air to lower altitudes. A katabatic wind occurs when cold, dense air accumulates over elevated landmasses—such as ice sheets, mountain slopes, or high plateaus—and then flows downward under the influence of gravity. These winds are...

The International Maritime Signal Flag Kilo. Meaning I wish to communicate with you.If appended by a Numeral Pennant:I wish to communicate with you by:1) Morse signalling by hand flags or arms;2) Loud hailer (megaphone);3) Morse signalling lamp;4) Sound signals.

A technique for moving or turning a ship by using a relatively light anchor known as a kedge.

A small, lightweight anchor used to reposition or manoeuvre a vessel in confined waters or to assist in anchoring when the main anchor is insufficient. A kedge anchor is a specialised type of anchor that is typically smaller and lighter than a ship's primary anchor. It is often used in situations where a vessel needs...