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PLC’s are hard to hack as they are not casually connected to WAN’s. The supervisory system on ships are not connected to WAN’s, just local networks, not the internet.
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I have never worked on a cargo ship where the enginecontolroom panels/computors have hade internet/satelite connection. It might exist somewhere, but I have never seen it.
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Maersk Engineer (note - an act of terrorism is usually not covered by insurance, so it would be in Maersk's interest for it to be that under force majeure, good luck)

No power, no steering.


Me