My Helix has the option to adjust the water level. No, but you can shade certain depths, like anything under 2 feet, shade it red. I make and follow custom iTracks, where I know it's deep enough for the TM, and no objects. It will follow the iTrack, and nothing else unless you tell it to otherwise. Following the contours is pretty much the same thing, except the contours are already pre-programmed. I find iTracks work better for custom paths in shallows (dodge stumps, logs, etc), and Follow Contours works better on offshore drop offs. That's how I use them.