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Encyclopedia of Marine Technology

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Plastic

A solid material which contains one or more synthetic organic high polymers as essential ingredients.

Plasticity

The property of a material that allows it to be extensively and repeatedly deformed without rupture and that allows it to retain its deformed shape after the applied force has been removed.

Platform supply vessel VIKING ENERGY

The VIKING ENERGY is the world first LNG-fuelled PSV. The construction of the hull and superstructure was subcontracted to the Polish shipyard Maritim in Gdańsk from where it was towed to Kleven Verft in Ulsteinvik, Norway, for outfitting.

Plating

The plates of a hull, a deck, a bulkhead, etc.

Plough

A cable plough is a sophisticated seabed tool that creates and back fills trenchers in order to protect all types of submarine cable.

Plug

A thing used for connecting a piece of electrical equipment to the main supply of electricity.

Pneumatic control valve

A valve which regulates the flow of a fluid. It is remotelyoperated as the correcting unit of an automatic control system. The actuator is operated by compressed air.

Pneumatic conveyor system

The loading/offloading system for dry powder material (cement) developed by Merevido Europe B.B.

Pod

An electric rudderpropeller, see Electric podded propulsors.

Polar orbiting satellite service

A service based on polar orbiting satellites which receive and relay distress, alerts from satellite EPIRBs and which provides their position (SOLAS, Chapter IV).

Pollutant

A substance that makes air, waters, soil etc dangerously dirty.

Pollution

The process of making air, water, soil etc dangerously dirty and not suitable for people or animals.

Pollution and accident control ship NEUWERK

The highly-sophisticated 3830t displacement multi-purpose ship built in 1998 by Stralsund shipyard, Volkswerft GmbH.

Pollution containment and recovery equipment

Collection and subsequent pumping of viscous oil is difficult unless specially developed equipment is used for spill clean up.

Pollution control ships

The new generation of advanced coast protection vessels to deal with potential emergencies.

Polymer

A high molecular weight material created from lower molecular weight constituents by chemical reaction. Polymers with resinous characteristics are frequently used in paints.

Polyurethane

A resin with special characteristics. Paints based on polyurethanes are either one or two-pack, and they wear extremely slowly and are resistant to chemicals.

Polyurethane foam

A foam obtained from the reaction between the polyetherpolyol and the polyisocyanate.

Pontoon

A simple, non self-propelled and unmanned floating structure without hatchways in the deck except small manholes closed with gasketed covers.

Pontoon cover

A cover with both sides closed. This term is often misused as the alternative name for an open-girder lift-away cover.

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