Diver Signaling Equipment...

[android]

Understanding simple geometry will allow you to aim a mirror.
Use the force Luke.
And have you ever used a CD to shave? I didn't think so.

Geometry is just not enough to aim a mirror or CD. Give it a try (I have) Find a nice reflective traffic sign. Now go about 1/2 mile down the road. Aim at the sign and flash it. When you hit it, you will know, because it will light up. Try with a CD. Try with a real signal mirror like a Rescue Reflector or StarFlash. Think about how hard it will be to hit a boat or plane while you're lost at sea. Especially a plane since there will be no reference point in the air. Throw CD in trash.

(Yes, I know you can sight a mirror using your fingers. This method sucks and nobody recommends it.)

 

[OBXDIVEGUY]

There was recently a discussion on the board about flares that can be used for diving:
http://www.scubaboard.com/t65622-.html

There is a flare that has a smoke signal on one end, and a hand held flare on the other, and it is rated to 100'.

Once mine comes in, I'll be carrying that on every boat dive. I also have a whistle. Make sure the whistle does not have a cork ball in it, it will grow like a sponge and not work at all. A signal mirror is on the same lanyard as the whistle.

Somewhere I saw something about a folding radar reflector. The CD thing might work for that if you could get it high enough, maybe even just the top of your rescue sausage.

I tell you what, after watching Open Water, I can't have enough signal stuff on me. :icon10:

 

[jagfish]

Here's the link to the OMS dye (at bottom of page).

http://www.omsdive.com/misc.html