S92 Roa
There is a difference between the ROA's for Stornoway and Sumburgh. Stornoway have the Aux tanks fitted so have increased fuel capacity so can fly achieve the same ROA as a RAF Sea King but without the need to remove role equipment. If you use a strip list then the S92 can go further.
At Sumburgh the tanks are not fitted because it is surrounded by rigs with fuel so just like Wattisham, there is less operational requirement to fly 250nm out into the Atlantic for a job.