The Royal Marine Commandos are changing.

The Royal Navy is getting two new aircraft carriers, and thus an expanded need for an organic force capable of Maritime interdiction operations (MIO), Visit, Board, Search, and Seizure (VBSS), and personnel recovery (PR).

To assume this task, 42 Commando has reorganized as a Maritime Operations Commando (MOC).  With around 400 men, its tasks will expand beyond normal fleet protection and transcend into the specialized realm of maritime counter-terrorism (MCT).

MCT has been hitherto an SBS and, to a lesser extent, an SAS boat troop niche.