On Fri, 04 Jan 2008 05:12:10 GMT, Jere Lull wrote:

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

How soon we forget. Most any of them give lat/long. They replace the
sextant, not charts. If you also get some sort of database, so much
the better.

Casady

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.

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/

dave wrote:
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.

Youn could probably navigate the Florida Keys with it, so long as you were
in a car and not a boat.

Dennis.

In article ,
(Richard Casady) wrote:

On Fri, 04 Jan 2008 05:12:10 GMT, Jere Lull wrote:

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

How soon we forget. Most any of them give lat/long. They replace the
sextant, not charts. If you also get some sort of database, so much
the better.

Another difference to marine GPS is that they most likely do not include
SDGPS, ie more precise position (like 2 metres instead of 20 metres).
Of course, on open sea this does not make any difference.

Marc

--
remove bye and from mercial to get valid e-mail
http://www.heusser.com