a ground-to-air emergency code used by pilots who have managed
an emergency landing, or have crashed but survived,
signifies that ammunition and firearms are needed. Thus there is a semiotic relationship
to the military use of .
This sign is also found on tape recorders and video appliances, but turned 90 degrees, to and . The meanings are fast forward winding and fast reverse winding. In this use is synonymous with .
The similar is used by indian peoples in southwest USA. It is called track of the thunderbird and denotes bright prospects.
Compare with synonymous in Group 42.