Glossary Archive

A permanent lean to one side or the other

The condition of a vessel leaning to one side due to an imbalance in weight or external forces.  A vessel lists when it tilts to port or starboard due to an uneven distribution of weight, such as cargo, fuel, or ballast, or as a result of flooding. Unlike rolling, which is a temporary motion caused...

Flag semaphore indicating the letter L.

International Morse Code sequence representing the letter L.

A Local Notice to Mariners (LNM) is a publication issued by maritime authorities to provide important information to mariners about navigational hazards, changes to aids to navigation, and other relevant updates affecting a specific area or waterway. LNMs are typically issued regularly and are essential for ensuring the safety of maritime navigation in a particular...

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A Local Notice to Mariners (LNM) is a publication issued by maritime authorities to provide important information to mariners about navigational hazards, changes to aids to navigation, and other relevant updates affecting a specific area or waterway. LNMs are typically issued regularly and are essential for ensuring the safety of maritime navigation in a particular...

A gated section of a waterway, such as a canal or river, designed to raise or lower vessels between stretches of water at different levels. A lock is an essential feature of many inland waterways, enabling vessels to navigate areas where the water level changes due to natural gradients, tides, or man-made structures such as...

A storage compartment or enclosed space on a boat, typically used for stowing equipment, gear, or provisions securely. A locker on a boat is a storage area designed to keep various items safe, dry, and organised while at sea. These compartments are often built into the structure of the vessel, such as under seats, within...

An official record maintained aboard a vessel that documents the ship's daily activities, including navigational data, weather conditions, and significant events. A logbook, also known as a ship's log or deck log, is a crucial document on any vessel, whether it be a commercial ship, naval vessel, or recreational boat. It serves as a comprehensive...