I wouldn't be out on the water without one. Just an example. About 3 yrs ago now there were two boys 16 & 17 I believe. They when off shore just north of Clearwater beach in the winter time here in Florida. Well, they had no communication, the jetski they were riding was disabled by debris in the water. They died from hypothermia. Yes hypothermia in Florida! A handheld VHF radio is a very very very cheap safety device... worth far less than you or a family members life.
We have a fixed unit on mental Floss. I also always go out with a "ditch bag" It contains a flare gun and flares, whistle, signal mirror, a hand held vhf radio, spare set of "AA" batteries and some glow sticks. For the bag, I use a soft side 6 pack cooler which I got free from BoatUS. For less than $200 you could put together the same thing and just grab it up when you go to the boat.
Like in another post, I haven't said anything on the board about the on-line business for boating accessories I'm setting up. If you would like some prices on handheld vhf radios i can get you what you need. But regardless of where you buy... definitely buy something. We always recommend vhf over Cell phones in every USPS Safe Boating class we teach and I spend about 5 minutes in the GPS Seminar I teach for the Power Squadron on the importance of interfacing your GPS with your DSC VHF radio so a DSC distress call includes your lat and Lon. It takes the search out of search and rescue for the Coasties.
Lou:
The required safety gear needed to meet the federal standards for the Coast Guard DOES NOT include a vhf radio. During any Vessel Safety Checks I perform, it is HIGHLY recommended, but not required to receive a Inspection sticker.
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Jvalich
http://www.badcock.com'04 FW 288 Vista "Mental Floss"