Originally Posted by Top banana
well it does seem to sugest nmea 0183 data in-out,
OK so now we've sorted that out then the OP is looking at:
A cable to connect the GPS to VHF (£20 ish)
A VHF/DSC radio (general consensus seems to be that ICOM / S.Horizon offer good value for money - there are cheaper units but the OP seems to have a very small boat and therefore probably very wet - and the waterproofing and longevity may not be as good) £120 ish
Subtotal £ 180 ish
But if you don't aleady have a battery you'll need to add the cost of that (wiring, battery, switch, fuse etc - easily £30). And if you don't have a console then I'd suggest you need to look at waterproofing all the electrics etc - and somesort of box is going to bring the total cost upto the same sort of price as the S/H handheld dsc...
Obviously if you already have the data cable, the battery and enclosure then it turns that all on its head.