Spawnout, all the Garmin Blue chip/Blue chart (cd-rom)cartography is going to have the same info as a N.O.A.A. chart, if its on a chart, its on the software.

Topwater, As good as the G-chart cartography is, it has been replaced by Blue chip/Blue chart, very similar. Smaller chip, updated info.

One thing that should be mentioned, as good as the current technology is, gps should never be substituted for a chart and a compass. I've sold gps units to guys that have told me they don't know how to plot a course on a chart, what do these guys plan on doing when the fog rolls in at Swiftsure and there gps takes a dive on them? rolleyes