| G force: |
The acceleration of gravity (g), which is approximately 9.81 meters/second2 . G or g is also used as a stress measurement for bodies undergoing acceleration., or the "loads" imposed on an aircraft or pilot. Loads may be centrifugal and aerodynamic due to |
| General aviation: |
General aviation - A term denoting all civil (nonmilitary) aviation other than common commercial transport; includes personal flying, business flying, instructional flying, and commercial flying such as aerial photography and agricultural spraying. |
| GIF: |
An image file format designed for display of line art on the Web. |
| Glidepath: |
The sloping course along which an aircraft tracks as it comes in to land. |
| Glossy paper: |
Printing paper with a smooth shiny surface finish to give maximum detail and tonal range. |
| Golf: |
Stands for the letter G in the phonetic alphabet. |
| GPS: |
Stands for Global Positioning System (Navstar). Navigational system using orbiting satellites to determine the aircraft's position on the Earth. Developed at first for military use, then widespread on commercial and private aircraft, it is now expected to |
| Grain.: |
Minute metallic silver deposits form a photographic image. The individual grain is never visible, even in an enlargement, but the randomness of their distribution in the emulsion can cause over-lapping, or clumping, which can lead to graininess in the fin |
| Gravity: |
The natural force that pulls an object toward the earth. We experience gravity as weight. An airplane must generate enough lift to counteract the weight of an aircraft. |
| Greenhouse Effect: |
The warming of the atmosphere by the trapping of longwave radiation (heat) being radiated to space. The gases most responsible for this effect are water vapor and carbon dioxide |
| Ground controller: |
An operator in the Control Tower that is responsible for directing and approving the movement of aircraft and ground vehicles on the airport surface. |
| Ground fog .: |
Shallow fog (less than twenty feet deep) produced over the land by the cooling of the lower atmosphere as it comes in contact with the ground. Also known as radiation fog. |
| Ground speed: |
The speed of an aircraft relative to the surface of the Earth. |
| Gust: |
A brief sudden increase in wind speed. Generally the duration is less than 20 seconds and the fluctuation greater than 10 mph. |
| Gyroscope: |
A comparatively heavy wheel mounted on a spinning axis which is free to rotate about one or both of two axes perpendicular to each other and to the spinning axis. The gyroscope is used to sense directional changes and to develop signals for operating auto |
| Gyroscopic camera mount: |
Device employing a gyroscope to help stabilize hand held cameras subject to movement or vibration from outside sources. |
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