| Glossary term | Description |
|---|---|
| gallon |
Measure of volume with several forms. 1 US gallon = 3.785 litres. 1 Imperial gallon = 4.546 litres. Occasional industry standard measure, rather that litres (metric) |
| gas carrier | Specialised vessel for the carriage of LPG or LNG. |
| general cargo | Goods packaged or unpackaged but not in bulk. |
| GMT |
Greenwich Mean Time |
| GPS |
Global Positioning System, position fixing system using signals from satellites |
| grating |
Floor of a refrigerated hold/container, designed so air can flow along the floor |
| graving dock |
Drydock for vessel maintenance |
| growlers |
Icebergs. Blocks of ice that have broken free from the parent shelf and may be a navigation hazard |
| grt |
Gross registered tonnage. The moulded volume of all enclosed spaces of the vessel. A formula is then applied to those measurements, hence no unit of measurement is assigned and the figure is simply referred to as the vessel’s gross tonnage |
| gt |
Gross tonnage. A function of the moulded volume of all enclosed spaces of the ship as per the 1969 International Convention on Tonnage Measurement of Ships |
