Hole? What hole? We don't need no stinking hole! (paraphrase of the best movie line ever). You can aim quite effectively by picking up the mirror beam on a near by surface and then moving the mirror to your target area. If nothing is close at hand (a rare situation), extend your index and mid fingers in a V to use as an aiming point. It is easier to demonstrate than to describe. Take a mirror out and play with it a bit and you will quickly get the hang of it.

The center aiming point does give more precision, and this is important in military situations where you want extremely precise aiming and where you want to NOT signal the bad guys. This consideration will not apply to most of the survival situations discussed on this list. In fact, random flashing of the distant horizon, without any known target, is recommended to call attention to your plight.