I've found more info on pontoons and small boats in these forums than anywhere else, but have to admit I'm not a fly fisherman. Hope you can forgive me and I do appreciate the knowledge you flyfishers have and the art of your pursuit. Wish I'd learned many years ago but its getting late for that. I usually fish from my canoe,(Coleman 15'), but got a pontoon,(Creek Company ODC 1018) last year. In my old age, I've decided that its time to get a fish finder so I don't spend all my time wondering if there are even fish down there. The Hummingbird Fishin' buddys are ok and I'm considering the 120. My reservations come from the small 9 degree cone since the lake I fish most is no more than 25 ft deep and mostly shallower. I see other portables that seem like they'd do ok in my canoe except for the transducer. Not sure I could trust a suction cup to hold it to the canoe and would not know how to mount to my pontoon. Hummingbird used to make fishin' buddies with a wider angle but don't seem to anymore. I'm looking for suggestions or whatever your experiences have been mounting something other than the buddy to a pontoon and what you do about the transducer mounting. Thank you!