The Special Boat Squadron is the Royal Marines special operation branch. Apparently the SBS is held in higher regard than the SAS. This is because they are recruited from the Royal Marines, the SAS recruits from all the services. They are about 250 in strength, this is to create a efficient and mobile team, along with an increase level of secrecy.

The SBS members learn all the same stuff as the SAS along with the addition of methods of diving, submarine insertion, advanced marine reconnaissance, canoeing (wow a soldier in a canoe) and other specialist waterborne methods of warfare.