The SBS is under the Operational Command of Director Special Forces, which allocates resources to the Permanent Joint Headquarters, deployed forces or other tasks as required. Qualified personnel are known as "Swimmer Canoeists" and are employed in one of the operational squadrons, training wing or elsewhere in the RM, RN, DSF or MOD.
- S or Z Squadron –
- Specialists in small watercraft and minisub Swimmer Delivery Vehicle (SDV) insertions. The divers of S squadron specialize in underwater attack using mini-submarines and swimmer delivery vehicles. During a war, the SBS would sneak into enemy harbors and attach magnetic mines to ship's hulls.