I have a Gen 2 Helix 9 at my console I want to read just depth on plane and at speed, what transducer due you recommend and mounting? I had a Lowrance glassed to the inside of the hull and it stopped working. I tried a bunch of different locations for a skimmer on the transom and was never successful. I've been running blind for years which has been fine because I've been on familiar water, I'm starting to venture out to new waters again and would like to at least no to brace for impact if I'm going to run aground. Thoughts?