Many types of signal exists.
Be in distress. The second thing you should do is to be sure nothing flammable will be set afire by them.
flares orange tarp dye flare gun parachute flare radio distress button epirb
That's the technical description for a signal flare !
They have an expiration date
hand held red flare
Waving your hands not as a fist
Send up a flare or hail local authorities on your radio.
Proper procedure for using hand held visual distress signal flare
There are many causes of gastrointestinal distress. One cause of gastrointestinal distress is from amnesic shellfish poisoning. Enzyme deficiencies is also another cause of gastrointestinal distress.
highly visable
I believe you are asking about a flare gun. It is used to put a light high up in the sky to signal distress and location.