You can pass on the right here if the left lane hogger are not keeping up to speed, though that situation is frowned upon.
Or say you are arriving at a intersection where traffic are just starting in the L lane but you are in the empty R lane and at speed.
No matter what people mush check when they change lane i assume, at least that only sound reasonable to me that if you make a course change, you make sure you can do that before you put over the helm.
And now i am thinking about the Japanese pilot that was no good at English or listening, so i misunderstood him, called out what i had heard, and then i put in a lot of rudder on the 200 M / 1/8 mile long tanker to make it turn 90 deg to the left ( port )
And what was the plan from the pilot was to change from a heading of 200 deg to 190 deg, but i heard 090 degrees and called that out before i engaged course change,,,,,, as a good sailor / helm man must do.
And it made sense as to port was nothing but open ocean.
Captain and navigator also heard it all, and had no complaints,,,,,, neither had the pilot though he of course barked out new headings as i raced past the heading that was his plan to steer.
So MT Torm Kristina did make a S move for sure