Almost clear, but just a few questions
The 2nd beam pattern:
Is this a beam pattern from above the transducer, because of the 360 degree, and why is it so "bad" at 90-270 degrees?
The 3rd beam pattern:
At about -5 drg the signal is 9'. What's that, and why is the signal so varying (digitally?)?
Have a look at this datasheet page 4 and 5
Can you describe me, why the beam pattern looks like it does
Are these beam pattern different from the other 3 (transmitter beam pattern or receiver beam pattern)
Thanks