Noyo Pacific Kayaking

Have two depth finders I could mount on my kayak but so far, I never have. One is a Hummingbird portable unit, the other is a (Bottom Line, Fishing Buddy) unit that has the transducer on an attached tube and runs on flashlight batteries. If I thought I needed it, I would hook it up but so far, have not. (Ok, it is on my list of things to do.)