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Old 03-16-2016, 01:27 AM
Senior Member
Join Date: Jul 2015
Posts: 305

It's all about compromise and trade-offs with transducers. Some other points for you to consider...

On paper, the 51 should give you better Sidevu range - being able to distinguish objects further to the side of the boat.

In the case of traditional sonar, it should also give you a little improvement in bottom detail (narrower beam at the high kHz end but same width at the low end), possibly better bottom type discrimination too due to better power/sensitivity. You are also likely to also get better bottom holding at higher speeds.

I haven't seen them side by side though so maybe kmoose can clarify whether the theory stacks up on those points.
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