I recently bought a Garmin 740s and used it fishing out of Venice for six days last week. The mapping detail was horrendous even with the settings set to most detail. Very large bodies of water that have been around for a long time show up as land like pole lake near south pass. The main entrance to the wagon wheel off of red pass does not show. I thought these units came with the G2 coastal data and were supposed to be very good. Is there a better card I Need to buy? I really feel like returning this unit back to Garmin if this is what I am going to have to deal with.