Navionics just released a feature that lets you easily visualize the bottom contours... the bottom of the water body. Makes it super easy to identify channels, fishing spots, dive spots etc.
Check out how to get it and what you can do with it.https://bit.ly/3e9cHn6
Hmm, that's interesting... would've come in handy aboard the sportfishing boat when I worked as a deckhand so long ago, back when dinosaurs roamed the earth. We DID have sonar, depth finder, fish finder, etc., but this looks pretty cool, it'd be useful to a commercial fisherman.