A rescue helicopter is flying a training sortie up a valley on a bright summer afternoon. Below, a family on a picnic waves cheerfully, both arms up, as people do at helicopters. The crew see two raised arms, which in their language means "yes, we need help". They turn, descend, burn fuel and time, and land in a field of startled sheep to find nobody needs anything. Meanwhile, somewhere else,…
In this lesson
The ground-to-air emergency code
Choosing the message
Placing it
Building ground symbols: size, contrast and materials
Time and energy
SOS on the ground
Reading an aircraft's reply
What to do
Body signals to a helicopter: Y and N
How to give them
The waving problem
The arms distress signal
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The rest of this lesson is in the full course
Every module, practical and exam, self-paced and private, with a certificate at the end.
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