As far as conspiracy theories go with the Baltimore bridge, it would be much easier to compromise local onboard navigators and crew than it would be to f’k with gps or other satellite coms.
My older cousin was 25 years in the merchant Marines 70’s-90’s. He said he was on big ships that only had a crew of 20 to 25 people.
If you want to hack a ship just hack its crew. They’re all working for the money so they would probably be pretty easy to buy off.
anyway, I think it was just a bad accident.