On Mon, 09 May 2005 00:30:33 GMT, "Peter Aitken"
wrote:

Which brings up a related question. Different systems use different maps,
and it seems to me that the quality of the maps is a very important factor.
Where can you get information about this?

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Good question. Another factor to consider is compatability and vendor
"lock in". Although I'm generally happy with my Furuno CMAP unit, I
am unhappy that Furuno CMAP cartridges are incompatible with other
CMAP units. There is a similar isue with Garmin chart CDs. If you
pay to have a Garmin chart "unlocked" from the CD, it will only
function with the unit/serial # that you unlocked it for.