Garmin Striker Vivid 7cv fish finder at 30 mph and contour maps working is just amazing. Not only is it holding depth at 30 mph (29.7 mph) but the contour maps was still recording. As I went into for the day I went back over the maps and it was all there. I am very impressed with the unit so far. I need to learn how to use Active Captain and I know the experience will be even better.