Glossary Archive

Flag semaphore indicating the Number 9. This shape represents both the Number 9 (Flag Semaphore) and the Letter I (Flag Semaphore). Before delivering any numbers, the sender uses the 'Numbers to follow (Flag Semaphore)' signal. The sender uses the Letter J (Flag Semaphore) to switch back to letters.

International Morse Code sequence representing the number 9.

A position or direction towards the rear (stern) of a vessel relative to a specific point of reference on the boat. In maritime terminology, "abaft" describes something located further towards the stern (the back end) of the ship than another point on the vessel. For example, if an object is said to be "abaft the...

To reduce in intensity, force, or degree, especially in relation to wind, waves, or other marine conditions. Abate refers to the lessening or diminishing of natural forces such as wind, waves, or currents that affect a vessel's movement and safety at sea. When sailors or mariners speak of the wind or sea abating, they describe...

The position or direction at right angles to the centreline or keel of a vessel, typically on either side of the boat. Abeam describes something located directly to the side of a vessel at a 90-degree angle from the centreline or keel. This position is neither forward nor aft but on the boat's port (left)...

Something done openly, honestly, and straightforwardly without deceit or dishonesty. It originates from pirates hiding crew members below deck during a raid, while those visible on the upper deck were considered "above board" and acting honestly. Today, the term is used more generally to describe actions or transactions that are transparent and legitimate.

The area of a boat or ship located on the main deck or any higher deck levels. This area is typically exposed to the elements and is where various activities on board occur, such as navigation, steering, and passenger or crew movement.

An unintentional and often abrupt change in a sailing vessel's course that causes the boom to swing violently across the boat, typically due to a shift in wind direction or a lapse in helm control. An accidental gybe, also known as an unintended gybe, occurs when a sailing vessel's mainsail and boom shift from one...

The International Maritime Signal Flag Alpha. Meaning I have a diver down; keep well clear at slow speed.If appended with a Numeral Pennant, an Azimuth or bearing.

A vessel that is floating without being anchored, moored, or under control, often at the mercy of wind and currents.  Adrift describes a situation where a boat, ship, or other floating object is not secured or under any form of control. When a vessel is adrift, it is not anchored, tied to a dock, or...