You just come ten miles behind the cable laying ship and splice it before it's ever terminated. I don't know if cable laying ships keep a connection to land ove

You just come ten miles behind the cable laying ship and splice it before it's ever terminated. I don't know if cable laying ships keep a connection to land over the cable as it's laid, but even if they do, you just place somebody on the ship to notify you when they're asleep or to tamper with the monitoring system.