TM 1-1680-359-10
2-7.  OPERATING PROCEDURE (Cont)
(d)
Broadcast the above information for 5 seconds.  Then listen for 5 seconds.  If no answer or 
aircraft can be heard in your vicinity, switch to beacon mode (BCN).
NOTE
Do not point tip of antenna at rescue aircraft when transmitting.
(e)
At 15 minutes before the hour and 15 minutes after the hour, repeat steps 3 and 4.
(f)
If aircraft is ELT equipped, use survival radio for voice transmission only.
m.
MK-24 SMOKE AND ILLUMINATION FLARE.
(1)
The smoke signal is a hand-actuated day or night distress signal.  One end of the signal contains 
orange smoke for daytime and the opposite end (flare end) contains a pyrotechnic composition for 
illumination during nighttime use.  The Illumination end can be identified by a series of embossed 
projections located 1/4 inch below the end cap.
2-45