the effect of being underwater regardless of whether submerged or not. Mask and snorkel recovery is a key portion that is tested on, in which the trainee has to recover the mask and snorkel from the deep end of the pool, "clearing" the mask of water while still submerged and "clearing" the snorkel of water as well. These two can be referred to as key training tools. Items such as rope and booties can be used to further increase the intensity of water confidence training. Special Warfare Assessment and Selection (A&S), Lackland AFB, Texas (4 Weeks) This is the actual selection course, where aspiring PJs will learn water confidence techniques, rehabilitation, physical conditioning, running, and nutrition, among other vital skills. A&S is divided into 2 segments: Field Phase and Selection Phase; Field Phase (2.5 weeks): Time is spent in the field, sleeping in makeshift lodging in cots with sleeping bags. Pool work consisting of surface swimming, water confidence, running, rucking (walking with a loaded backpack), grass & guerrilla drills, calisthenics, and extended training days. Selection Phase (1.5 weeks): Candidates will be administered tests, surveys, critiques, and interviews. Instructors will compile all relevant information and select only those candidates that meet the required standards. The course is extremely demanding, candidates are pushed to their physical and mental limits, with an attrition rate of about 75 percent. Army Airborne School, Fort Benning, Georgia (3 weeks) Students learn the basic parachuting skills required to infiltrate an objective area by static line airdrop. This course includes ground operations week, tower week, and "jump week" when participants make five parachute jumps. Personnel who complete this training are awarded the basic parachutist rating and are allowed to wear the Parachutist Badge. Special Warfare Combat Dive Course, Navy Diving and Salvage Training Center, Naval Support Activity Panama City, Florida (8 weeks) The course is divided into four blocks of instruction: (1) Diving Theory, (2) Infiltration/Exfiltration Methods, (3) Open Circuit Diving Operations, and (4) Closed Circuit Diving Operations. The primary focus of AFCDC is to develop Pararescuemen/Combat Rescue Officers and Combat Controller/Special Tactics Officers into competent, capable and safe combat divers/swimmers. The course provides commanders with divers/swimmers capable of undertaking personnel recovery and special operations waterborne missions. AFCDC provides diver training through classroom instruction, extensive physical training, surface and sub-surface water confidence pool exercises, pool familiarization dives, day/night tactical open water surface/sub-surface infiltration swims, open/closed circuit diving procedures