Howard Shappey demonstrates subduing techniques as part of Security Augmentaion Force training aboard Marine Corps Recruit Depot Parris Island May 23. SAF is a detail of Marines selected to assist the Provost Marshal’s Office with security in emergency situations. Shappey is a training specialist with PMO. - Howard Shappey demonstrates subduing techniques as part of Security Augmentaion Force training aboard Marine Corps Recruit Depot Parris Island May 23. SAF is a detail of Marines selected to assist the Provost Marshal’s Office with security in emergency situations. Shappey is a training specialist with PMO.