Glossary Papakupu

Explanations of abbreviations and acronyms.
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    D

    Daily information bulletin (DIB)
    A memorandum provided to users of KiwiRail’s network that contains information about train running and track maintenance activities for that day.
    Damper bearing
    Damper bearing is installed on the tail rotor drive shaft to dampen normal lateral and vertical oscillations.
    DART
    Dynamic Automatic Radio Transmission
    DC
    Direct current
    De-icing
    Removal of ice and snow from aircraft surfaces
    Deadweight Tonnage
    Maximum weight a ship can safely carry including cargo fuel and stores
    Demurrage
    Charge for exceeding agreed laytime during loading or unloading
    Departure signal
    A signal controlling entry to a block section, which is the entire section of line between two stations. Block sections can be divided into intermediate sections. Permission to pass a departure signal at red requires written authority from train control.
    Detention
    Charge for delayed return or use of equipment beyond free time
    Dew poinbt
    The temperature at which air becomes saturated and can hold no more moisture.
    DFDR
    digital flight data recorder
    Dial test indicator
    A tool used to measure clearances and tolerances and variations in tolerance.
    Disconnecting the autothrottle
    The autothrottle remains engaged until reverse thrust is selected after touchdown.
    DME
    distance measuring equipment
    DOC
    Department of Conservation
    Downwind call
    Radio call made when established on the downwind leg and abeam the upwind threshold to positively establish the aircraft’s position in the circuit for other traffic
    Downwind leg
    A flight path parallel to the landing runway in the opposite direction to landing
    Draft Survey
    Method to determine ship cargo weight by measuring draft changes
    Draught
    Vertical distance between a ship's waterline and keel
    Drawgear
    Assembly on rail vehicles for traction and cushioning of forces
    Drivetrain
    The helicopter’s drivetrain is a group of components that transfers power
    Drone
    The generic term used when referring to a Remotely Piloted Aircraft System (RPAS), an Unmanned Aerial Vehicle (UAV) or an aircraft in operation without a pilot onboard.
    Drone operators
    The owner of a drone
    Drone pilot
    The person controlling the drone in flight.
    Drury
    Clevedon and Drury are designated visual reporting points for aircraft flying into Ardmore, to achieve geographical separation for inbound and outbound aircraft.
    Dry dock
    A basin that can be flooded to allow a vessel to be floated into it, then drained, to allow the vessel to rest on a dry platform exposing the entire hull. Dry docks are used for vessel construction, maintenance and repair
    Dynamic check
    This is where a pilot would attempt to lift off and hover close to the ground and check to see that the controls were in a position that allowed full deflection movement.