Glossary
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TermDefinition
- Flag / Pennant, Signals & Communication Code Flag Sierra (S)
The International Maritime Signal Flag Sierra.
Meaning
I am operating astern propulsion.
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If appended with a Numeral Pennant, Speed... - General Nautical Terminology ScopeAmount of cable or 'rode' which is let out when anchoring or laying a cable.
- General Nautical Terminology ScupperDrain hole in the toe-rail
- General Nautical Terminology Sea AnchorA device, such as a conical canvas bag open at both ends, streamed from bow to stern to hold a boat bow or stern onto the wind or sea
- General Nautical Terminology Sea BreezeA daytime wind blowing across a coastline from the sea caused by the rising air from land heated by the sun
- General Nautical Terminology SeacockA stop-cock next to the hull to prevent accidental entry of water
- General Nautical Terminology SealegsThe ability to keep one’s feet in spite of the motion of the boat
- General Nautical Terminology Search and Rescue (SAR)
The coordinated efforts undertaken to locate and assist individuals in distress or imminent danger, typically at sea, and to bring them to...
More Details - General Nautical Terminology Secondary PortSmaller harbours without their own tide tables in the Almanac. Corrections are needed in relation to the closest Standard Port to find tide times... More Details
- Flag / Pennant, Signals & Communication Second Substitute (ICS Flag)
Substitute or repeater flags allow messages with duplicate characters to be signalled without requiring multiple sets of flags.
- General Nautical Terminology Sector Light
Occasionally a light may not be visible through 360 degrees, or it may shine different colours depending on where it is viewed from. In this...
More Details - General Nautical Terminology, Signals & Communication Sécurité
Sécurité is a term used in maritime communication to indicate a safety message or alert being broadcast over the radio to all vessels in the...
More Details - Flag Semaphore, Morse Code, Signals & Communication Semaphore
A semaphore is a system of sending messages using visual signals, typically with flags or lights. It is commonly used in marine communications to...
More Details - General Nautical Terminology Semi-Displacement VesselA semi-displacement hull combines the features of a planing vessel along with a displacement hull. The vessel will rise at the bow as she... More Details
- General Nautical Terminology SendVertical movement of waves or swell against, for example, a harbour wall
- General Nautical Terminology, Navigation Set
The direction which a current flows in a body of water.
In marine navigation, understanding the set of a current is crucial for plotting an...
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The process of securing a boat in a stationary position by deploying and embedding an anchor into the seabed.
When a mariner 'sets anchor',...
More Details - General Nautical Terminology Set Sail
To "set sail" means to begin a voyage or journey by sea, typically by hoisting the sails of a sailboat or ship to catch the wind and propel the...
More Details - General Nautical Terminology ShackleA metal link for connecting ropes, wires or chains to sails, anchors, etc.
- General Nautical Terminology ShaftdriveMany sailing vessels and most motor cruisers will have a shaftdrive transmission system. A shaft runs from the gearbox, through the hull beneath... More Details