Traditional railway terminology for the supervisor of an infrastructure team (work gang) of track workers
Gangway
The inter-carriage walking surface provided between adjoining passenger carriages.
Gantline
A rope of approximately 20 millimetres in diameter used for hauling sailors and tools aloft. It has sufficient strength to support someone should they fall
Gas generator RPM
Engine gas generator (compressor) speed, expressed as a percentage of revolutions per minute
Gas temperature
The average measured temperature of the gas path in an engine
Gate
Passenger or aircraft departure position at a terminal
Gauge
The distance between the inside faces of railheads, measured 16 mm below the running surface.
General shunting
The movement of one or more rail vehicles by means of pulling or pushing.
Generator set enclosure
The generator set enclosure includes the engine, generator, fuel system and cooling and exhaust systems.
Generator tripped
Generator automatically shut down because of overload
Geon
The dark grey material at the edge of some windshields, where rivets attach the windshields to window frames.
GeVis
A KiwiRail software application that displays dynamic geographical location of trains on the network. It is a source of information and is not designed for use as a safe-working system.
GFS
Global Forecast System
Give-way vessel
Under the collision-prevention rules – a vessel that is directed to keep out of the way of another vessel
Glideslope
An instrument landing system that indicates the proper path of descent for an aircraft preparing to land.
Global Forecast System (GFS)
A USA-based National Center for Environmental Prediction weather forecast model that generates data for, among others, wind. The system couples four separate models (atmosphere, ocean, land/soil and sea ice) to work together and predict global weather conditions.
GNSS
Global Navigation Satellite System: A satellite system that provides location data for navigation purposes; one of Compass, Galileo, Glonass, or GPS.
GNZ
Gliding New Zealand Incorporated
Go around
A discontinued approach to land. Sometimes termed an overshoot.
Go-around
To discontinue a landing approach and re-circuit for another attempt
Governor
A device that senses engine and rotor speed and makes adjustments to help maintain the desired speed.
GPS
Global Positioning System - A system that uses satellites to determine coordinates and location positions on a map.
Grade separation
To isolate road and rail traffic from one another by the construction of a bridge or tunnel/underpass.
Grade specification
Requirements and limits that define the properties and quality of a product, ensuring it performs correctly and meets safety and environmental standards
GRAFOR
Graphical aviation forecast
Grandfathering
A provision in which an old rule continues to apply to an existing vessel while a new rule will apply to all future vessels. Those exempt from the new rule are said to have grandfather rights
Grandparent rights
A provision in which an old rule continues to apply to an existing vessel while a new rule applies to all future vessels. Those exempt from the new rule are said to have grandparent rights.
Gravel bar
An elevated region of sediment that has been deposited by the flow of a river
Greater Wellington Regional Council
The owner of the Wellington region commuter trains
Grooved
Cut across to assist with water runoff and aid braking
Gross Tonnage
Measurement of a ship's overall internal volume
Ground effect
A helicopter is ‘in ground effect’ when the downwash from the main rotor strikes the surface, stopping the downward wash and generating an increase in pressure, effectively a cushion of air that decreases the power required to maintain height. The effect reduces as the helicopter moves further from the surface, meaning more power will be required. At a height equivalent to the distance of half to one rotor diameter, the effect is considered to be nil and the helicopter is said to be ‘out of ground effect’
Ground Handling
Services provided to aircraft while on the ground
Ground-relay fault
An unintentional electrical path that runs between a power source and a ground surface.
GSMEACQ
GSMEACQ means Ground, Situation, Mission, Execution, Admin, Command, Questions
GT
Gross tonnes
Guard's wagon
A wagon that is attached to the rear of a freight train and serves as an office for the train guard while they are in transit.
Gudgeon
A hole or socket in which a pintle rotates.
Gunnel
Gunnel is an alternative spelling of gunwale, the upper side of a ship or boat or the uppermost planks of a wooden vessel.
Gunwale
The top edge of the hull of a boat.
Gyroscopic precession
Is when a force applied to a spinning gyroscope is transmitted 90 degrees in the direction of rotation i.e. pushing the front of a clockwise spinning disc down results in it tilting to the right.
