I have replaced an older fishfinder with a new GPS/ fishfinder combo unit, an Eagle Cuda 250i map.
I had the predecessor Cuda 240 in my previous Drascombes, but the new thing is a lot better still. Most noticeable: A basic worldwide map is included, the font sizes of the displayed data can be set to 'Enormous' to be readable from metres away without glasses, and the speed is now dispayed with two decimals. Loads of other features as well. And the price is lower today than it was, due to the weak US$.
Power consumption only 180 mA.
The display unit with the integrated antenna is mounted to bulkhead below the tabernacle. Using a trick one can tilt the screen to face 10-15 degrees upward. (Not possible on the Humminbird Matrix units).
The transducer is inside the centreboard groove. I made a rectangular cutout there and covered that from below with a thin copper lid.
Very good signal quality for depths over 0.6 metres (below that it`s double echos.)
Best unit I ever had so far.