Join Date: Aug 2010
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Garmin Colorado 400C GPS
I have owned the Garmin Colorado 400C GPS for 2.5 months and use it on a sailboat going less than 8 mph. The 2 problems are 1) the speed jumps all over the place second by second when going that slow so it is useless for sailing needs (I wonder if the ETA, ... are inaccurate) and 2) the map display and cursor/track up only works correctly if the GPS is lying horizontal (if the GPS is vertical the cursor moves down & sideways). Garmin tells me the inaccurate speed is a feature due to the intense accuracy of WAAS. They had no answer for the need to hold horizontal other than telling me that the satellite reception breaks up over water and can't be used on the water. I am pleased with it (since I am upgrading from a 14 yr old Garmin 12) in many ways & don't see an alternative for a manual GPS with charts on a sailboat. Also the price is right.
I have tried this GPS walking, driving, riding the launch at our marina, and on the high speed ferry to try to debug the problems. It works fine on the high speed ferry which is where I've figured out the many features since I have an hour to play.
I plan to use my ancient Garmin 12 for speed -- hope it lasts.
I did upload the firmware when registering at Garmin. But haven't had the problems others reported.