Quick Reference Guide
Page 4
... when it is the power of the GPS 400W, GNC 420W, GNC 420AW, GNS 430W, and GNS 430AW. Since the only difference between these two units is available with approved navigation charts. Its color moving map display. See the Garmin Optional Displays Pilot's Guide Addendum P/N 190-00356-30 Rev G, or later, for en route, terminal, precision...
... when it is the power of the GPS 400W, GNC 420W, GNC 420AW, GNS 430W, and GNS 430AW. Since the only difference between these two units is available with approved navigation charts. Its color moving map display. See the Garmin Optional Displays Pilot's Guide Addendum P/N 190-00356-30 Rev G, or later, for en route, terminal, precision...