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

    O

    Object salience
    That property by which something stands out, ie its importance relative to other objects.
    OBL
    Onehunga Branch Line
    OCS
    Oceanic control service
    Oiler
    A junior position within the vessel’s engineering team, responsible for general maintenance and cleaning.
    Oily water separator
    An oil-discharge monitoring, filtering and control system that ensures oil discharged to the sea does not exceed a rate of 15 parts per million.
    On-job training
    On-job training spans the period when a trainee completes practical train driving training a minimum time period of 1040 hours before a full certification assessment can be conducted.
    On-scene coordinator
    Coordinator of all search and rescue assets at the scene. The RCC still retained responsibility for overall coordination of the search.
    On-the-Job Training (OJT)
    The placement of a trainee with a licensed practitioner in actual operations to carry out safety-critical tasks. The purpose of this training is for the trainee to gain exposure to a range of experiences and become fully competent in the designated tasks.
    On-track
    The term used to position a road rail vehicle known as a hi rail vehicle on a level crossing or track access site to engage the vehicle’s rail wheels with the track for rail operation.
    On-tracked
    The activity whereby the HRV transitions from the road onto the railway track by lowering the rail wheels. Off-tracking is the opposite action, from the railway track onto the road.
    Onboard Staff Manager (OSM)
    Manages the onboard service on the train.
    Operating instruction
    A method of authorising a train journey for use only on the Midland line
    Operator
    A person authorised to operate a mobile track-maintenance vehicle and who is in charge of the train or machine group.
    Operator’s exposition
    A manual that defines the organisation, identifies the approved senior persons and details the means of compliance with the CARs.
    OpsSpec
    Operations specification (USA)
    Ordinary Safety Assessments (OSAs)
    OSA is a safety assessment undertaken of all parts or any part of a rail participant’s rail activities to enable the Director of Land Transport to gain appropriate assurances that those rail activities will continue to be conducted safely or to determine the action that must be taken by the rail participant so that those assurances may be gained.
    Ordinary Seaman (OS)
    Seafarer, aged 18 or more, who has not qualified to be rated as an AB.
    Orographic uplift
    The process by which a mass of air is lifted by a geographical feature such as a line of hills or a mountain range.
    Out of ground effect (OGE)
    A helicopter is said to be OGE when the rotor downwash is no longer affected by the surface under it and more power is required to hover. This change occurs gradually at a height equivalent to about one rotor disc diameter.
    Outbound pilotage
    The activity carried out by a pilot in assisting the master of a ship in navigation while entering or leaving a port.
    Overhead position
    A pilot can join the circuit pattern at an unattended airfield by flying overhead the airfield at an altitude 500 ft above the circuit altitude so that they can assess the wind direction and circuit direction in use by other aircraft.
    Overhead power lines
    Overhead power lines operate with a current of 1500 volts, which powers the train as it operates under them. They are connected by the train’s adjustable pantograph to transfer the power to the train’s traction motor system.
    Overlap
    The section of line in advance of a stop signal that must be unoccupied.
    Overrun
    An aircraft departs the end of a runway