I've played with all sorts of signal mirrors and really don't like using any of the sighting systems I've seen. I very much prefer using the "manual" method where you put the mirror under your eye, extend a hand with fingers in a "V", place the target inside the "V", and then flash the mirror across the "V" fingers - as shown in this illustration:
http://www.equipped.org/pp/pic236.htm Maybe its because I wear glasses??
Does anyone else out there feel the same way about sighting systems on signal mirrors?
I bring this up because I've been teaching my children how to use their signal mirrors - recently added to their survival kits - and they seem to do better with the "V" method too.
I use the small glass mirror sold by Countycomm.com, but I gave my kids the plastic AMK Rescue Flash mirrors (lighter weight and maybe less likely to break).
Ken K.