A possible solution
Hi Tim, thanks for the feedback.
My current plan is to get a proper Navman cable through Seamark Nunn. I'll wire that to a 12v cigarette lighter style plug (male). You're right, you can get a 13amp 240v transformer to 12v terminating in a cigarette lighter style socket (female) from a number of sources including Maplin.
Plug the male into the female and watch the sparks fly! {Well hopefully not!}
I've got the various bits on order. When they arrive I'll take a few pics. & post an update. Estimated project cost £50.
The female socket has a second intended purpose to justify the cost which is to charge up the cool box overnight before a trip. Need to keep the beers cold!
Russell
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