Ground and body signals are a great way to get the attention of pilots flying over head. The figures below both show ground signal as well as body signals; both can be seen from overhead.

GROUND SIGNALS

1Þ Serious injuries-need doctor
2Þ Need medical supplies
3Þ Unable to proceed
4Þ Need food and water
5Þ Need a gun and ammunition
6Þ Indicate direction to proceed
7Þ Am proceeding in this direction
8Þ Will attempt to take off
9Þ Aircraft badly damaged
10Þ Probably safe to land here
11Þ All is well
12Þ Need fuel and oil
13Þ No
14Þ Yes
15Þ Not understood
16Þ Need engineer
17Þ Need compass and map
18Þ Need signal lamp