look at this i have the hand held as a back up good value and its waterproof
The Standard Horizon HX280E has all USA, Canadian and International VHF marine channels, one button dedicated to selecting distress channel 16 and hailing channel 9 programmable scan any number of channels, channel 16 dual watch.
UPGRADED VERSION OF THE BEST SELLING HX270E
FITTED WITH A HIGH CAPACITY BATTERY 1650ah LITHIUM-ION
FULLY WATERPROOF TO IPX7 - WILL WITHSTAND SUBMERSION IN DEPTHS OF WATER NOT EXCEEDING 1 METRE FOR A PERIOD OF UP TO 30 MINUTES
Our Price: £ 87.99
web site is http://www.marinescene.co.uk/search/
hope this helps