A potential close quarters situation in the approaches to the Cape Roca TSS

摘要

A ship approaching a TSS, still at a distance of 12 nautical miles, is concerned by the actions of another vessel - on the reporter's port quarter, probabty overtaking - who is closing on a steady bearing. 'The other ship' alters to port at just under a mile, giving a CPA of 3 cables. The reporter who is himself overtaking another vessel on his starboard side with a speed advantage of 0.4 knots, slows down, and alters to starboard to open the CPA on 'the other ship', presumably under the stern of the one he was very slowly overtaking.