Echo sounding

Neither do I, and I'd rather say that than guess.

Professional Echo Sounder surveys use different equipment and different protocols, and nobody is claiming a budget boat replaces them.

What it does is put a working instrument in a hobbyist's hands.

In the hands of someone who will move on.

Yeah, I completely agree with that.

Actually, when we were in Greenland, we had the chance to use the Echo Sounder in a particular spot.

And we did scan the seabed.

And it was really nice to see some of the patterns where some of the icebergs were dragged across the seabed.