The complete guide
Mounting a fish finder on a belly boat without it getting in the way
A fish finder is only useful if it stays put and stays visible while you fish — which is where most generic mounts fall down on a belly boat.
Why a generic mount usually doesn't work
Bike mounts, car dashboard mounts and clip-on phone holders are built for flat, rigid surfaces. A belly boat's inflatable tube edge is neither flat nor rigid in the same way, so generic mounts either don't grip properly or vibrate loose over a session.
What a belly-boat-specific mount gets right
Deeper built the Flexible Arm 2.0 around the actual shape and material of a belly boat gunwale — the G-Clamp is sized for that kind of edge, and the 79cm reach keeps the sonar unit clear of your fins and paddle strokes.
Using the flex adjustment well
Set the arm's angle for casting first, then use the up-to-20cm in-mount flex to swing the sonar into scanning position when you want to check structure, rather than fully repositioning the clamp each time.
Keeping it secure over a session
Check the G-Clamp tension before you launch, not after you're afloat — a quick tug test on dry land catches a loose clamp before it matters. Re-check it once you're on the water if you've been moving around a lot.