Azipods in reverse?
I am certainly not a marine engineer, but I do take note of interesting tech. Yes, Azipods have made a big 'splash' in the cruise industry which is why I am aware of them. I did not think they ran in reverse. I thought they were fixed pitch and fixed rotation. If they wanted to back the ship up, they simply spin the Azipod 180 degrees.
The other interesting thing is they pull the ship through the water rather than push it. All-in-all, cool new tech for a heritage industry long on traditions.