I purchased the Eagle FishMark 320 last year (with the portable pack) and love it. Suction cup transducer easily mounted to the back of my canoe and I was able to use it for the better part of a week last summer without re-charging. This year, I’m mounting it onto the bow of my “new-to-me” boat. Bought another transducer so I can keep it portable and take it with me canoeing if need be…