The problem is not that the technology is bad. The problem is that going to sea is much more complicated than non-seagoing people think. And, the sea is terribly unforgiving of any mistakes, incapacity or inattentiveness. We have gyrocompasses but we do check them against the magnetic compass. We have wonderful tracking radars with gyro stabilized displays. But, we still have lookouts for the things that radars do not pick up (like small boats). Satellite navigation provides us with accurate fixes, 24 hours a day. But, I still brought my sextant, and was expected to use it.
The engine room has a similar situation. Having engineers to maintain and repair the equipment is imperative. There are no repair crews when you are in the middle of the ocean.
A completely automated ship is even less likely than an automated airliner without a pilot.
If I attempted to convert this office to Linux without them, I would be humiliated, publicly flogged, and my bones left for the crows to pick on.
Time to take stock. Go home with some office supplies.