as with all charts
, the wider you get, the less local info and detail you get..
what we've done, get the larger or WIDE chart for distance you would be traveling open water
and detail or smaller of the area you want to visit.
we have the wide for areas of the complete pacific but smaller of the islands we intend to visit..
something you want to check, we ran into an issue of charts
published at different times.. more info was on the newer charts as well as color.. normally we would put both chips into the unit at the same time as its built with 2 slots.. thinking the larger would show and when we got into the area where the smaller or detailed chart would "pick up", we found the plotter (SL70CRC) would jump from one chip info to the other.. one in B&W to one in color.. we solved
the issue by pulling the large area chip when entering a small chip area..
when I call about the issue, they said the problem could be solved
by up-dating all the chips to the same date..