Directional drilling (or slant drilling) is the practice of drilling non-vertical wellbores.

Automated telegraphy techniques which comply with the relevant recommendations of the International Radio Consultative Committee (CCIR), (SOLAS).

A damaged or impared vessel not able proceed by its own.

Any machine that grinds by the action of a rotating disc.

Any release from a ship including any escape, disposal, spilling, leaking, pumping, emitting or emptying.

An essential document for officers and seamen as it serves an official certificate confirming their sea experience in the employment time.

The discharge rate is defined as the steady current in amperes (A) that can be taken from a battery of defined capacity (Ah) over a defined period(h).

Any piping leading through the ship sides for conveying bilge water, cooling water, drains, etc.

In electrical engineering, a disconnector, disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de-energized for service or maintenance.

An interrption of the typical structure of a material, such as lack of homogeneity in its mechanicall, metallurgical, or physical characteristics. A discontinuity is not necessarily a defect.

The purpose of this system is to send a covert signal from a ship which will be not obvious to anyone on the ship who is not aware of the alert system.

Refers to any time that the crew leave the ship, be it a port call or final destination.

A stand alone parabolic reflector which produces temeperatures in a working fluid up to 700 °C (1,292 °F).

The ability of a power plant to increase and decrease output quickly on demand.

Electricity sources that can be brought online on demand.

In fluid dynamics, dispersion of water waves generally refers to frequency dispersion, which means that waves of different wavelengths travel at different phase speeds.

In the physical sciences and electrical engineering, dispersion relations describe the effect of dispersion on the properties of waves in a medium.

It is the weight of water displaced by this vessel at any waterline. It is the product of the volume of its underwater portion and the density of the water in which it floats.

A curve showing the displacement of a vessel in fresh or salt water at any draft.

The height above ground level where wind speed is theoretically zero based on the effects of ground cover.