... One of his tips was to always wear a whistle on your lanyard
as when the river suddenly rises you may be excited if you are trapped by
rising water, but that does not mean your voice will be heard over the raoar of
an outboard motor. They will know you are there if you use a whistle.

Damn good idea, Big Dale, but forget that kid's Boy Scout whistle.
Just recently I read somewhere about a super-loud survival whistle. I
googled it and found :

http://www.nitro-pak.com/product_inf...roducts_id/134

I can't vouch for it, but it might be worth looking into. (Blowing
into?)

vince