Valve chests are a series of valves all built into a single block or a manifold. Various arrangements of suction and discharge connections are possible in this assembly.

The relationship between the valve lift and flow. It is of particular importance for the control valves. The common characteristics are quick-opening, linear and equal percentage.

A cylinder fitted with ports in which a valve plug moves. The port openings are shaped to produce various flow characteristics for different valves, e.g. linear or equalpercentage.

A device provided in a piping system to regulate or stop the liquid flow.

A new type of toilets operating on the vacuum principle. Usually, the vacuum is created by an ejector.

Industrial vacuum cleaners can be used to remove shipyard debris (dust, weld slag and welding rod ends).

Delivered by Hyundai, the 314,00dwt vessels STENA VISION and STENA VICTORY have one parameter in common with traditional VLCCs and that is the length, 333m.

A ship that has been destroyed or badly damaged.

A room where things are made or repaired using machines and/or tools.

Re-entry into a completed well for modification or repair work.

The skill with which something was made.

A small platform used for works on the ship when afloat.

The multipurpose workboat BELYRYAR features a pontoonshape and a double chine bow.

Usually, a small pontoon type, flush deck craft designed to carry out a wide range of work.

A drawing which shows the detailed wiring and connections between items of electrical equipment and may also show the routing of connections.

A ring mounted on the propeller hub in order to protect the sterntube aft seal.

see Ekranoplans.

Windows are not allowed to be used in superstructures or in the ship shell, but only in deckhouses. However, if the deckhouse protects an opening in the deck, deadlights are required.

Each windlass is to be tested under working conditions after installation onboard.

A machine designed to hoist or lower an anchor. It consist of a horizontal barrel that is fitted with gear-like projections (cable lifter) that engage the links of the anchor chain.