I'd advise do not even think of bringing it back to the UK. I'd also say leave it on the boat and deny all knowledge of it whatsoever.
I tried to buy a Sterling a long time ago to take to Oman - the export form wanted to know how many wings it had, and whether or not they rotated.
It is, one of these was my last boat and they sail like logs - great if you want to go with the tide, hopeless otherwise, they won't sail much upwind of about 40 degrees and they are surprisingly heavy to launch/recover single-handed. There is something about them, though......
Yes, so far as I can gather from the specs the Navman does use something different to "standard" or certainly most of what I can find on eBay - but is that NMEA GPS or is NMEA just what all GPS signals are?
Can anyone help with this, it may be an already covered or just plain dumb question:
I have an old Navman 900. There is nothing wrong with it, it still takes C-Map charts and does everything it should EXCEPT - the antenna did not come with the boat. Plastimo want £200+ for an antenna, which...
You're in good company at least - Captain Cook (the one who went to Australia) used to keep his iron keys in the compass binnacle.
Given his orders were "Go to 40 South and turn left" it didn't really matter, but it does stand at odds with his desciption as the greatest navigator of all time...