The average member of the United States Navy's Sea, Air, Land Teams (SEALs) spends over a year in a series of formal training environments before being awarded the Special Warfare Operator Naval Rating and the Navy Enlisted Classification (NEC) O26A Combatant Swimmer (SEAL) or, in the case of commissioned naval officers, the designation 113X Special Warfare Officer. All Navy SEALs must attend and graduate from their rating's 24-week "A" School known as Basic Underwater Demolition/SEAL (BUD/S) school, a basic parachutist course and then the 26-week SEAL Qualification Training program.

All sailors entering the SEAL training pipeline chosen by Naval Special Warfare Command must also attend the six-month SEAL specific Special Operations Tactical Medic course in Stennis, Mississippi, and subsequently earn the NEC SO-5393 Naval Special Warfare Medic before joining an operational Team. Once outside the formal schooling environment SEALs entering a new Team at the beginning of an operational rotation can expect 18 months of training interspersed with leave and other time off before each six-month deployment.