Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition.

Spontaneous fission is a form of radioactive decay that is found only in very heavy chemical elements.

In thermodynamics, a spontaneous process is a process which occurs without any external input to the system.

A gas-liquid contactor used to achieve mass and heat transfer between a continuous gas phase (that can contain dispersed solid particles) and a dispersed liquid phase. This type of technology can be used for example as a wet scrubber for air pollution control.

A type of Position Mooring System. It is a system with multiple catenarymooring lines anchored to piles or drag anchors at the seabed.

A frame containing four twistlocks on its bottom corners which fit into the top container castings.

The area which is covered by one litre of paint.

A spring is an elastic object that stores mechanical energy.

see Mooring lines.

see Sandwich Plate System.

Sputter deposition is a physical vapor deposition (PVD) method of thin film deposition by sputtering.

A squall line or quasi-linear convective system (QLCS) is a line of thunderstorms forming along or ahead of a cold front.

Ship squat is the averall decrease in the static underkeel clearance, forward or aft, created by dynamical sinking of a ship when moving ahead.

A squirrel-cage rotor is the rotating part of the common squirrel-cage induction motor.

Ship stability is the ability of a ship to float in an upright position and, if inclined under action of an external force, to return to this position after the external force has ceased acting.

see Loading and Stability Manual.

Stability data are a set of data resulting from ship design process. It covers stability characteristics pertaining to a specific ship.

Onboard Stability Documentation is the part of As Build Drawings. In order to operate the ship in a safe way, the documentation must be legible, clear and easy to use.

A stability instrument is an onboard instrument comprising hardware and software, by means of which all relevant stability information is provided...

An electrical output that is constant at all times within a specified value range.