benm, the camera is only a little B&W CCD model, which I bought because it wasn't too expensive and would allow me to pilot the idea of mounting external cameras and mics. Re sound, I have already trialled mics in the engine bay and it's pretty good. I need to build a preamp before I can get the sound and video working together. Once I've done that I'll be choosing a colour camera.
Tex and I had been musing about it for a few weeks (ie "wouldn't it be cool if...") and then I thought hell let's try it, bought what I needed on a friday afternoon and made up the cables. Turned up 20mins late to dinner with a bit of a smirk until I spilled the beans and said I had onboard video and we tested it that night, then I brought it with me on the hunter cruise the next day. So it's very much a prototype