This is very good information to have. We use our autopilot when cruising the Gulf ICW when not crowded, but have never tried it going under a bridge and never will. About 6 months ago, as part of our work to prepare for our Great Loop trip when we retire in 3 years, we replaced our antique (1995) electronics with a complete Garmin package and have been very pleased with the results. I made the decision to stay with all one brand to avoid the kind of problems that Ray described, Garmin blaming Simrad who blames Raymarine etc. etc.. So far so good. ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5941 / Virus Database: 4354/9909 - Release Date: 05/31/15