http://www.force4.co.uk/force-4-compact-bluetooth-marine-stereo.html?sqr=Marine%20stereo&#.V5OeVYnTXqA
Can get them cheaper elsewhere Iirc but can't remember where.
Fully waterproof (apparently), easy to fit, cheaper than a fusion. It's what i would have fitted to the fletcher if we didn't already have a "letterbox" style DIN slot for one.
Not sure to expect much in terms of sound quality but on an open boat and with occasional use, this is probably no problem.




