I've dried it out and put it back in the boat. There is no visual damage to the inside at all, and the only problem i noticed was the speaker had sounded crap. I've read an owners manual online that says in the trouble shooting section;
"No sound from speaker - speaker full of water, drain water"
I however, am going to purchase a handheld VHF as a back up, and monitor the situation closely. Any more problems and it will get the bin.
Thanks for all your help, and Chris - I am sorry to see you are going to hell for your perfectly reasonable suggestion!
I think i'll buy a boat*
*I think i'll buy a boat and then spend the rest of my life trying to afford to keep it