G
- gasoline
- A mixture of volatile, flammable liquid hydrocarbons used primarily for internal combustion engines, and characterized by a flash point of approximately - 40° C and a specific gravity from 0.65 to 0.75.
- Geographic Information System (GIS)
- Software that joins maps showing geographic features to observational data or databases.
- GICW
- See Gulf Intracoastal Waterway.
- GIS
- See Geographic Information System.
- Global Positioning System (GPS)
- A satellite-based radio navigation system developed by the U.S. Department of Defense. The system is formed by 24 satellites orbiting the earth at very high altitude, and their corresponding receivers on the earth. The GPS satellites transmit signals that allow one to determine the latitude and longitude of a receiver on earth by computing the time difference for signals from different satellites to reach the receiver. GPS is used in air, land and sea navigation, mapping, surveying and other applications where precise positioning is necessary.
- GPS
- See Global Positioning System.
- Gulf Intracoastal Waterway (GICW)
- The portion of the Intracoastal Waterway located along the Gulf Coast of the U.S. It is a navigable inland waterway running approximately 1050 mi (1700 km) from Carrabelle, Florida, to Brownsville, Texas. See also Intracoastal Waterway.
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