I keep the VHF in a velcro holster attached to the seat. Also have a PLB attached to my lifejacket. If you loose the radio, the PLB (Personal Locator Beacon) is huge peace of mind. Registared for free with the FCC, it sends an encoded msg via satelite to local authorities with a description of your kayak, and they will call the phone #'s that you provide when you registar to confirm it is a real emergency prior to initiating a search. It does not offer the pin point accuracy that one would hope it does, but it is definetly a worthwhile investment in safety if your an offshore kayaker.
http://www.westmarine.com/buy/acr-el...ChJxoCk-rw_wcB