SWCCs with Special Boat Unit 22 (SBU-22) prepare to insert SEALs from their Patrol Boat Light (PBL), 2001.
Special Boat Units, as part of Special Boat Squadrons, were the forerunners to the Special Boat Teams (SBTs) of today.
When Naval Special Warfare Command restructured in 2002, SBU-22 became SBT-22.
PBLs were used in a similar riverine role to the SOC-R boats now employed by SBT-22.