james croft
Contributor
I cary a MK13 day/night flare taped to my knife sheath. Been down with it over 130 many times' with no problems. All metal construction with a "poptop" type lid on it to make it completely waterproof. It has a roman candle type night flare that will light up a huge area as well as smoke day flare that makes a large orange cloud that is very noticable. I can't tell you where to buy them as this stuff is military issue. I just rinse it off good after each dive and I have never had one fail to ignite. The label wears off quickly but you can tell the night side from the day side by the braille method. It has a series of raised dots on the night side. I would suspect a marine survival company that maintains life rafts, etc may be able to locate some. Also they can get signalling mirrors (heliographs) with the sights on them. Avoid the plastic mirrors like the Gerber as the silver seems to diappear after being in salt water a while. Get the military milspec stuff if you can.