On 2008-01-03 22:00:01 -0500, dave said:

For christmas I was given a navman for the car. Does anyone know if
this can be used as a chart plotter. can on e buy a cmap or whatever to
go with it or is it purely a land lubbers thing.

I don't know the unit, but some caveats: 1) the non-marine ones often
aren't very water-resistant. 2) Some use an averaging algorithm instead
of many, many position calculations (or something like that) so may not
be powerful enough at boat speeds. [That one really surprised me.]

Personally, if it doesn't have a light list and NMEA/Seatalk
connectivity, I'll pass.

Still, any one of them is probably good enough to get you back home in
quiet conditions.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/