Basic Underwater Demolition/SEAL (BUD/S) Training

SEAL training is extremely demanding, both mentally and physically, and produces the world’s best maritime warriors. Our focus during this training is based on three core pillars:

Men of Character: The nature of our mission requires men who will uphold the Navy Core Values - Honor, Courage, and Commitment.

Physical: The nature of our mission also requires men who are physically fit and capable in every environment, especially the water.

Technical: Finally, maritime Special Operations require SEALS who are intelligent and can quickly learn new tasks.

Naval Special Warfare Training - Following basic training at Recruit Training Command, Great Lakes, IL, and basic rating training, you will begin Basic Underwater Demolition/SEAL (BUD/S) Training in Coronado, CA. This six-month course of instruction will focus on physical conditioning, small boat handling, diving physics, basic diving techniques, land warfare, weapons, demolitions, communications, and reconnaissance.

First Phase (Basic Conditioning) - 8 weeks - First Phase Trains, develops, and assesses SEAL candidates in physical conditioning, water competency, teamwork, and mental tenacity. This phase is eight weeks long. Physical conditioning with running, swimming, and calisthenics grows harder and harder as the weeks progress. You will participate in weekly four mile timed runs in boots, timed obstacle courses, swim distances up to two miles wearing fins in the ocean, and learn small boat seamanship.

The first three weeks of First Phase will prepare you for the fourth week, better known as "Hell Week." During this week, you will participate in five and one-half days of continuous training, with a maximum of four hours sleep total. This week is designed as the ultimate test of one's physical and mental motivation while in First Phase. Hell Week proves to those who make it that the human body can do ten times the amount of work the average man thinks possible. During Hell Week, you will learn the value of cool headedness, perseverance, and above all, TEAMWORK. The remaining four weeks are devoted to teaching various methods of conducting hydrographic surveys and how to create a hydrographic chart.

Second Phase (Diving) - 8 weeks - Diving Phase Trains, develops, and qualifies SEAL candidates as competent basic combat swimmers. This phase is eight weeks long. During this period, physical training continues and becomes even more intensive. Second Phase concentrates on combat SCUBA. You will learn two types of SCUBA: open circuit (compressed air) and closed circuit (100% oxygen). Emphasis is placed on long distance underwater dives with the goal of training students to become basic combat divers, using swimming and diving techniques as a means of transportation from their launch point to their combat objective. This is a skill that separates SEALs from all other Special Operations forces.

Third Phase (Land Warfare) - 9 weeks - Third Phase trains, develops, and qualifies SEAL candidates in basic weapons, demolition, and small unit tactics. This phase of training is nine weeks in length. Physical training continues to become more strenuous as the run distance increases and the minimum passing times are lowered for the runs, swims, and obstacle course. Third Phase concentrates on teaching land navigation, small-unit tactics, patrolling techniques, rappelling, marksmanship, and military explosives. The final three and a half weeks of Third Phase are spent on San Clemente Island, where students apply all the techniques they have acquired during training.

BUD/S Training Timeline

  • Indoctrination (5 weeks)
  • Basic Conditioning (8 weeks)
  • Diving (8 weeks)
  • Land Warfare (9 weeks)
  • Basic Parachute Training (3 weeks)
  • Receive Naval Special Warfare Classification - (NEC) Code

BUD/S Pass / Fail Evolutions

First Phase
50 meter underwater swim Pass/fail
Underwater knot tying Pass/fail
Drown-proofing test Pass/fail
Basic lifesaving test Pass/fail
1200 meter pool swim with fins 45 minutes
1 mile bay swim with fins 50 minutes
1 mile ocean swim with fins 50 minutes
1.5 mile swim with fins 70 minutes
2 mile ocean swim with fins 95 minutes
Obstacle course 15 minutes
4 mile timed run 32 minutes
Post-Hell Week
2000 meter condition pool swim without fins Completion
1.5 mile night bay swim with fins Completion
2 mile ocean swim with fins 85 minutes
4 mile timed run in boots 32 minutes
Obstacle course 13 minutes
Second Phase
2 mile ocean swim with fins 80 minutes
4 mile timed run in boots 31 minutes
Obstacle course 10.5 minutes
3.5 mile ocean swim with fins Completion
5.5 mile ocean swim with fins Completion
Third Phase
Obstacle course 10 minutes
4 mile timed run in boots 30 minutes
14 mile run Completion
2 mile ocean swim with fins 75 minutes
Required academic standards on written tests
Officers 80% or above
Enlisted 70% or above

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