Just out of interest, why the move away from Navman. Any particular reason??
We have 2 navman radios and one of their plotters. After a prob with the waterproof qualities of the plotter which failed due to water ingress behind the control panel membrane (so they tell me) on a showery day, the ensuing and repeated failure of just one navman person in particular to answer e mails has not endeared them to me. To be fair the plotter has been replaced by them but there are minor issues with the replacement that I want addressing/answering and a reply to my e mails would help resolve the matter.
Being in a service industry I believe customer care is everything and we treat people how we would like to be treated. Consequently I shall take our business elsewhere in future.