Darren New wrote:
> Yes. The boat is going along the tracks, and the sonar forms artifacts
> when it's also reflecting off the boat. Stuff like that. I read about it
> somewhere when someone else brought it up, and the boat captain chimed in.
...so the incidence of crossing lines depends on how much shipping is in
the area?
(And these features aren't part of the actual seabed...)
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