Glossary Papakupu

Explanations of abbreviations and acronyms.
All ' 1 A B C D E F G H I J K L M N O P Q R S T U V W Y Z

    W

    Wagon
    A wagon is a rail vehicle that moves freight on the rail network.
    Warning devices
    Devices that control vehicular and/or pedestrian traffic at level crossings using flashing lights, bells, barrier arms, gates or a combination of these devices.
    Warp
    A synthetic rope used to haul in a trawl fishing net.
    Warping drum
    Devices that provide power to haul on a rope or cable.
    Watchkeeping alarm
    An automated alarm designed to monitor the alertness of watchkeepers, while the ship is underway.
    Water ingress
    When water makes its way into the boat through a leak or crack
    Watertight
    Capable of preventing the passage of water in any direction under the head of water likely to occur.
    Wav
    Wav stands for waveform audio file, which is an audio file format standard for storing an audio bitstream on personal computers
    Wave period
    The time it takes two successive wave crests to pass a specified point.
    Wave spotter buoy
    A drifting waverider buoy.
    Wave trains
    A group of progressing waves of about the same wavelength moving in the same direction at about the same speed.
    Wavelength
    The distance from the trough in front of the wave and the trough behind the wave.
    Waverider buoy
    A buoy fitted with instruments that precisely measure directional waves for direction, heights, periods and energy data.
    Waypoint
    A specified point on a chart for a planned passage
    Weather minima
    The specified limits in visibility and cloud base used to assess against forecasted visibility and cloud base.
    Weather Risk Matrix
    In the Weather Risk Matrix, the four colour codes are Green – no impact, Yellow – minimal impact, Amber – high to very high impact, and Red – widespread impacts across the network.
    Wet winching
    Retrieval of people from water.
    WETA system
    Work Entry Train Alert system
    WF
    Wanaka
    WH
    Wellington Hospital
    Wharf
    Quayside structure where ships may load or unload
    Wheelhouse
    Enclosed area on a ship from which it is steered
    Wind backs
    When wind backs, the direction moves anti-clockwise. It veers when moving clockwise.
    Wind shadow
    A space downwind of an obstacle where the wind flow is affected by the obstacle.
    WN
    Wellington Airport
    Worksite
    An area with defined limits that is protected so that work can be undertaken.
    WP
    Whenuapai Airport Auckland
    WU
    Whanganui