Can anyone please explain the strange course taken by the semi-submersible heavy-lift ship HAWK recently ? According to AIS tracking websites she anchored in the Forth Estuary and on 14th June tugs towed the oil rig ENSCO 101 from Dundee, taking it near her but on 20th June they apparently took the rig back to Dundee. By 30th June it had been taken to the Forth again and was loaded aboard the HAWK which sailed for St. Petersburg - an area I do not associate with oil wells or shipbreaking. She sailed out into the North Sea but did a 180 degree turn, coming back off the Forth before heading north off Montrose, doing another about-turn and going south to off Berwick. Then she headed in the expected direction and into the Kattegat, nearing Elsinore - but turned again and came back into the Skagerrak. On 10th July she was north of Denmark doing about 9 knots but left her westward course by turning east for about 20 miles, then 20 miles west, 20 miles east, 20 miles west before resuming her passage. After anchoring off St. Petersburg, the HAWK is now sailing to Rotterdam and ENSCO 101 is at the Russian Kronstadt naval base. Why ?