If you have one of the networked systems, you don't have to have more than one data card to see the chart on two plotters. Ron Rogers ----- Original Message ----- From: "Jim Fidler" <fidlerjim@earthlink.net> | One advantage of the Garmin CD that I forgot to mention | is that the software lets you use the same digital | charts on two Garmin chartplotters at the same time | ("legally") so that you don't have to move | chips from the flybridge to lower helm or from your | helm to a backup or portable chartplotter. Of course you | must have a programmable data card for each chartplotter.