International Ground-to-Air Signal Codes
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Require doctor serious injuries
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Require map and compass
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All well
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Require medical supplies
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Indicate direction to proceed
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- No
- (Negative)
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Unable to proceed
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Proceeding in this direction
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- Yes
- (Affirmative)
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Require food and water
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Probably safe to land here
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Not understood
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Require firearms and ammunition
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Require fuel and oil
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Require engineer
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You can lay out these symbols using strips of fabric,
pieces of wood, stone, or any other available material. Try to make as big a
color contrast as possible between your symbol(s) and the surrounding terrain.
Symbols should be at least 8 feet in height or longer. Take care when
constructing these symbols so that they can't be confused. In addition, you
should use any means possible to try and attract an aircraft's attention: radio,
flames, smoke, flares etc.
Aircraft Acknowledgements
Message Understood: An aircraft
will indicate that ground signals have been understood by rocking from side to
side or by making green flashes with a signal lamp.
Message Not Understood: An
aircraft will indicate that ground signals are not understood by making a
complete right-hand circuit or by making red flashes with a signal lamp.
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