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Surtax
An additional extra tax.

Survey
An inspection of a certain item or object by a recognised specialist.

Surveyor
A specialist who carries out surveys.
Note: A surveyor is often representing a classification bureau or a governmental body.

Swop Body
Separate unit without wheels to carry cargo via road sometimes equipped with legs to be used to carry cargo intermodal within Europe. The advantage being that this unit can be left behind to load or discharge whilst the driver with the truck/chassis can change to another unit. These units are not used for sea transport.

Synergy
The simultaneous joint action of separate parties, which, together, have greater total effect than the sum of their individual effects.

System
A whole body of connected elements, which influence each other and have specific relations with the environment.