Moving slow, reported Restricted Manoeuvrability
Consider National Iranian Oil Company (Victoria Street, where bus stop "S" is located) also owns North Sea rigs.
Boatfags can only track them when they report themselves. Tanker ROMINA, formerly MARSHAL Z (now Iranian flagged btw) is a vessel that can go up to one of these sanctioned rigs, load, go to Singapore and sell the oil cargo. North Sea has rather many ships present all the time.
Please do not forget these people:
CNOOC International is one of the largest oil producers in the UK North Sea, contributing more than 25% of the UK’s oil production, and 10% of the country’s energy needs.
CNOOC International is the operator of the Buzzard, Golden Eagle and Scott platforms. Our business strategy is to maximize the value of our existing portfolio, while creating new opportunities for global growth.
We are actively exploring in the Central North Sea and West of Shetland, and our UK operations support exploration activity in Africa.
https://cnoocinternational.com/operations/europe/uk/