http://www.scotty.com/marine/products/product/safety/SFTY_whistles.html

Another one to consider besides the jetscream,Fox40s and Acmes.

This one actually has synthetic peas that they claim won't absorb moisture and stick. I still think that pealess is the way to go, the less to go wrong the better.

I never had my Acme Thunder pea type whistle fail me, wet or dry, but I still think that pealess is the way to go...

the #772 model is the standard issue British perry whistle...the whistle lays flat,compact and of course pea-less..the other model shown looks just a little bulky...the perrys used to be very common in the Brit.imported B.C.B survival tins..i still have a few scatterd around in my kit....vince g. 11b inf..