Good evening Raptor and Welcome,

I have done some whistle testing with our youth group and found that the Fox 40, ACR and Acme are near the same sound level, it always came down to the lung power of the kid doing the blowing. Depending on the day and which set of keys or PSK I have with me I could be carrying any one of these whistles. The Storm whistle is louded than the other three but I find it too bulky to EDC. I have never tried a Jet Scream whistle.

I just now put an Adventure Medical Kit Signal mirror (taken from a D. Ritter PSP) into a tub of water, it floated for a little while but when I removed the packaging that had trapped air in it, the mirror sunk to the bottom.

Hope this helps,

Mike