A vessel which due to the nature of her work is restricted in her ability to manoeuvre and is therefore unable to keep out of the way of another vessel.

The term “vessel not under command” means a vessel which through some exceptional circumstance is unable to manoeuvre and is therefore unable to keep out of the way of another vessel, (COLREG).

The term ”vessel engaged in fishing” means any vessel fishing with nets, lines, trawls or other fishing apparatus...

A power-driven vessel which, because of her draught in relation to the available depth and width of the navigable water, is severely restricted in her ability to deviate from the course she is following, (COLREG).

The ship has a total of 15 cargo oil tanks: five centre oil tanks and five pairs of side cargo tanks, with a combined capacity of 336,032m3.

Tankers in the 250,000 to 300,000 tonnes deadweight range were first introduced in the mid-1960s.

The direct method of voice communication. It is limited in range with normal equipment to under 100 miles, though this distance will vary according to weather and atmospheric conditions.

The welding position in which the weld axis, at the point of welding, is approximately vertical, and the weld face lies in an approximately vertical plane.

The cargo tanks of chemical tankers are required to be provided with venting systems which are independent of air pipes and vents serving other parts of the ship.

Any grid, vent pipe or opening through which air can enter or leave a space. Vent pipes on the weatherdeck can be a source of water ingress to lower deck areas.

A cover arrangement which is fitted over a ventilator to prevent the entry of rain, or sea water. It may also be used as a means of closure.

According to the International Convention on Load Lines, 1966, ventilators in position 1 shall have coamings of a height of at least 900 milimetres above the deck...

Ventilation is the circulation and refreshing of the air in a space without necessarily a change of temperature.

The optional system for Wärtsilä 46F engine. VIC offers the flexibility to apply early inlet valve closure at high load for lowest NOx levels...

VIT has been a traditional feature of Wärtsilä (Sulzer) slow-speed engines allowing to adapt an optimum injection timing over an engine load to various fuel properties having a poor combustion behaviour.

Equipment fitted to a tank to enable the measuring and sampling of cargoes without release of vapour/inert gas pressure.

The vent pipes from cargo oil tanks. They are led to pressure/vacuum valves which are usually mounted on standpipes some distance above the deck.

An arrangement of piping and other equipment used to control vapour emission during tanker operations, including ship and shore vapour collection systems, monitoring and control devices and vapour processing arrangements.

Sometimes suction must be taken from one of many sources and discharged to other units of either the same or another group. A valve manifold is used for this type of operation.

A movable cover which provides a variable restriction to fluid flow. A control valve may have two discs or valve plugs which are specially shaped to create the Valve characteristics.