Speed or velocity of current (2) The leeway, or movement of the boat, when not under power, or when being pushed sideways while under power

Ice in an area containing several small pieces of floating ice, but with total water area exceeding total area of ice.

: Regular ship shaped vessel, production ship. Positioned by anchors or dynamic positioning. Has its own propulsion machinery.

Fitted with drilling rig (oil derrick with rotary drill and a mud pumping system), drilling for petroleum.

Is a pipe extending downward from the bottom of the airline to collect any condensation flow in the pipe.

A ship drives when her anchor fails to hold and she is at the mercy of wind and tide, or when she can make no progress against the wind.

A coupling between the compressor and the engine or motor. The three types of drives most common are; flange mounted motor, V belt drive or direct coupling.

Very small precipitation drops (diameters less than 0.5 mm) that appear to float with air currents while falling in an irregular path. Unlike fog droplets, drizzle falls to the ground.

Derrick

Drill.

Any object used to increase the drag of a boat and slow her down. Typically shaped like a parachute or cone opened underwater, drogues decrease a boat's speed in heavy weather. Also see sea anchor.

Is a pipe coming from the top of the airline to feed air to an outlet for tools or air operated devices, so that condensation does not easily flow into the dropleg.

A radiosonde which is dropped by parachute from an aircraft for the purpose of obtaining soundings of the atmosphere below.

An instrument used to measure the amount of dew formed on a given surface.

The maximum rope tension (in kilonewtons), measured at the drum exit when the winch is hoisting or hauling in at the nominal speed with the rope wound on the drum in a single layer.

The rate of decrease of temperature with height when unsaturated air is lifted adiabatically (without exchange of heat with its surroundings). The decrease is due to expansion as the air is lifted to a lower pressure.

Rate at which unsaturated air cools as it travels vertically, provided that all temperature change is adiabatic (without heat exchange), and no condensation occurs.

The temperature of the air as measured by a standard thermometer.

Is the ambient gas temperature as indicated by a standard thermometer.

Cargo that is not liquid and normally does not require temperature control.