The area around an offshore installation within a radius of 500 m. Ships are prohibited from entry except under special circumstances, e.g. when in distress.

SAFSTOR is a nuclear decommissioning method in which a nuclear power plants/facilities governed by the United States Nuclear Regulatory Commission, is "placed and maintained in a condition that allows the facility to be safely stored and subsequently decontaminated (deferred decontamination) to levels that permit release for unrestricted use".

A condition where the bow and stern are supported by buoyancy and the ship's middle portion is not. The upper deck is under compression, the bottom under tension.

Excess flow paint, also called runs or curtains.

The Saimaa Canal runs through Russian as well as Finnish territory, and provides a direct route to and from ports located in the Saimaa Lake District.

Saline water (more commonly known as salt water) is water that contains a high concentration of dissolved salts (mainly sodium chloride).

Salinity is the saltiness or amount of salt dissolved in a body of water, called saline water.

Salinity gradient power is a specific renewable energy alternative that creates renewable and sustainable power by using naturally occurring processes.

An instrument which measures and indicates the amount of sodium chloride, expressed in parts per million, in a given sample of water.

Usage of the reactionary nature of salts when thay are hydrated and dehydrated for heat transfer.

Saltcrete is a mixture of cement with salts and brine, usually originating from liquid waste treatment plants.

The money paid for assistance in saving a ship or other goods from danger at sea or the actual goods themselves.

A body which acts, through its surveyors, to establish the nature, cause and extent of damage to a vessel and advice regarding repair or any means of determining the extent of loss.

Any act or activity undertaken to assist a vessel or any other property in danger in navigable waters or in any other waters whatsoever.

A commonly seen unit of sampling rate is Hz, which stands for Hertz and means "samples per second".

A rigid vertical post used in place of a mast to support derricks.

An abrasive cleaning method for steel plating which may use dry sand or sand and water mixture.

Sand boils or sand volcanoes occur when water under pressure wells up through a bed of sand. Sand boils can be a mechanism contributing to liquefaction and levee failure during floods.

SPS deck overlay system – SPS is a composite structural laminate that replaces conventional stiffened metal plates. SPS uses a solid polyurethane elastomer core encased by metal faceplates.

Drain lines from toilets, bathrooms, galley, etc.