G
- Galley
- Nautical term for a kitchen
- Ganger
- Traditional railway terminology for the supervisor of an infrastructure team (work gang) of track workers
- Gate
- Passenger or aircraft departure position at a terminal
- Generator set enclosure
- The generator set enclosure includes the engine, generator, fuel system and cooling and exhaust systems.
- 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
- 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
- GPS
- Global Positioning System
- Grooved
- Cut across to assist with water runoff and aid braking
- Gross Tonnage
- Measurement of a ship's overall internal volume
- 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
- 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.