The distance from the top of the hatch, or from the top of the inspection cover in the hatch, down to the surface of oil in the cargo tanks of oil tankers.

Manufactured by Beele Engineering of the Netherlands, the support system suitable for tanks with cargo temperatures up to 250°C.

A maritime “black box”. VDR is usually two-part system consisting of a data collecting unit, and a protected storage unit that stores the retrieved data.

The total volume of water displaced by the ship.

Petroleum, having a flash point below 60°C as determined by the closed cup method of testing.

Volatile Organic Compounds (VOC) are light components of crude oil, which evaporate during loading operations or during the carriage of high-volatility crude oil cargoes.

A type of the azimuthing propulsor which generates thrust by means of profiled blades that project from the bottom of the ship. The blades are mounted in a rotor casing that is flush with the bottom of the ship.

A tug driven by the Voith-Schneider propellers arranged in the forebody. Underneath the propellers there is a nozzle plate.

The Voith Turbo Fin is a rotating cylinder at the end of the skeg. It ensures stable flow and increases lift by means of the larger angle of attack.

The Voith Cycloidal Rudder is based on the Voith-Schneider Propulsor. It has a rotor casing that can rotate about a vertical axis, with two axially parallel rudder blades or hydrofoils projecting from it.

An enclosed space in the cargo area external to a cargo tank, other than a hold space, ballast space, oil fuel tank, cargo pump-room, pump room, or any space in normal use by personnel, (IBC Code).

They are pumps directly related to and necessary for maintaining the operation of the propulsion machinery.

In the event of an emergency at sea where there is a need to abandon ship, every second counts and rapid evacuation is a must.

The double-ended ferry DOKTOR WAGEMAKER carries 1750 passengers on the 20 minutes crossing.

A system provided to verify the officer of the watch alertness.

The evaluation of vibration on board the ship shall be based on the results of measurements carried out under the following conditions...

A device fitted to an engine crankshaft to suppress or reduce the stresses resulting from torsional vibration.

Excessive vibration of ship structures and equipment can be a serious problem and lead to failure of the propulsion system, structural failures of the primary structure and damage to shipboard equipment.

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).