Gimball - A device that suspends a compass so that it remains level
Category: - Maritime

GIS - Geographic Information System: A special case of information systems where the database consists of observations on spatially distributed features, activities or events, which are definable in space as point, lines, or areas. A geographic information system manipulates data about these points, lines, and areas to retrieve data for ad hoc queries and analyses. (Dueker's Definition)
Category: - GIS - Acronym

Global Maritime Distress and Safety System - "The Global Maritime Distress and Safety System (GMDSS) is an automated ship to shore distress alerting system that relies on satellite and advanced terrestrial communications links. The system also provides some limited ship to ship communications capabilities. "
Category: - Maritime - Risk - SAR

Global Positioning System - The GPS is a satellite based navigation system. It is used both on the ground by SAR Techs and in all of the SAR aircraft. GPS enables crews to be within a few hundred meters of a location. It is especially useful in the north, where a lack of obvious visual features, trees, mountains, often hampers navigation.
Category: - Maritime - SAR

GMDSS - "The Global Maritime Distress and Safety System (GMDSS) is an automated ship to shore distress alerting system that relies on satellite and advanced terrestrial communications links. The system also provides some limited ship to ship communications capabilities. "
Category: - Maritime - Risk - Acronym - SAR

GNP - Gross National Product: Gross Domestic Product (GDP) plus the net income accruing from foreign sources.
Category: - Acronym

Gooseneck - A device that connects the boom to the mast
Category: - Maritime

GPS - Global Positioning System: The GPS is a satellite based navigation system. It is used both on the ground by SAR Techs and in all of the SAR aircraft. GPS enables crews to be within a few hundred meters of a location. It is especially useful in the north, where a lack of obvious visual features, trees, mountains, often hampers navigation.
Category: - Maritime - Acronym - SAR

Graduated Symbol Map - A map type that varies the size of a common geometric symbol to show the amount of an attribute at points or at centroids of areas. For example, cities could be shown with circles of area proportional to population, or census tracts could have a proportional circle divided as a pie chart at a representative point inside the tract.
Category: - GIS

Graticule - The latitude and longitude grid drawn on a map or globe. The angle at which the graticule meets is the best first indicator of what projection has been used for the map.
Category: - GIS