How the Navy SEALs Work

Navy SEALs complete some of the most dangerous U.S. military missions. Learn about how the Navy SEALs work and what it takes to become a SEAL. See more night vision pictures.
Official U.S. Navy photo

Any place where there are currently U.S. troops, you'll find that SEALs are either there now or were there first. The role that Navy SEAL teams play rev­olves around getting in and out quickly and without being seen, gathering intelligence, destroying targets, and performing rescues, among other things.

U.S. Special Operations Forces, which includes elite commando forces from each branch of the military, such as the Navy SEALs, Army Rangers, Green Berets, and others have become critical to many U.S. military successes over the past decade. Each branch of the military has its own specially trained teams that can operate in any situation and perform whatever task it takes to get the job done.

What does it take to become a Navy SEAL? Even SEAL instructors can't predict who will make it all the way. The common trait instructors see in future SEALs can't really be defined, they just call it "fire in the gut." You either have it or you don't.

In this article, you'll see how Navy SEALs operate and what they do, the amazing determination it takes to become a SEAL, the widely varied skills they need, and the types of equipment they use on missions.­

About Navy SEALs

The SEAL acronym stands for Sea, Air, and Land, which identifies the elements in which they operate. SEALs work in small units -- often one to two men, but sometimes in a platoon comprised of up to 16. They are trained to perform specific tasks under any type of circumstance and in any environment. Their training takes place in the desert, the jungle, in extreme hot and cold weather, and in urban areas.

SEAL mis­sions require detailed planning and precise execution. SEALs are trained to perform missions that fall into five main categories:

  • Unconventional Warfare (UW) - Using guerilla warfare tactics in battle. Guerilla warfare is characterized by small, mobile combat groups that operate using often "unorthodox" battle methods like destroying enemy supplies, creating diversions, ambushing small enemy units, demolitions, and other "hit and run" types of operations.
  • Foreign Internal Defense (FID) - Training given to foreign nationals in order to build relationships. During Operation Desert Storm, Navy SEALs trained 13 Kuwaiti operators in maritime infiltration techniques in order to set up a secret meeting with local resistance contacts within Iraq-occupied Kuwait City.
  • Direct Action (DA) - Moving against an enemy target. This may include assaults on land- or water-based targets, hostage rescues, ambushes, etc.
  • Counterterrorism (CT) - Includes direct action against terrorist operations, antiterrorist actions for preventing terrorist acts, and protecting citizens and troops.
  • Special Reconnaissance (SR) - Includes conducting preliminary surveys to gather information, manning observation posts, and other types of surveillance, both overt and covert, where the goal is to gather information.This may include gathering hydrographic data (beach and water surveys) for landings or following an enemy unit and reporting its position.

When SEALs aren't deployed, they're in constant training, both to hone basic skills and to learn new skills and techniques that will make a difference when they are deployed.

The above categories overlap when it comes to actual missions, but these are the basis of SEAL training: to be expert in the skills required to perform these various tasks.

Navy SEAL History

Republic of Vietnam, November 1967: Members of U.S. Navy Seal Team One move down the Bassac River in a Seal Team Assault Boat (STAB) during operations along the river south of Saigon.
Republic of Vietnam, November 1967: Members of U.S. Navy Seal Team One move down the Bassac River in a Seal Team Assault Boat (STAB) during operations along the river south of Saigon.
Photo courtesy U.S. National Archives and Records Administration (NARA) Photographer: J.D. Randal, JO1

In 1941, after the Japanese bombed Pearl Harbor, U.S. troops were forced to invade Japanese territory by sea, often facing landmines and attacks from unseen enemies. As a countermeasure to these hazards, the U.S. Navy began creating teams that were specially trained to go safely ashore and clear the path of obstacles and other hazards and return intelligence on enemy locations. These teams of six men were called Naval Combat Demolition Units. Their training was heavy in physical strengthening and included carrying heavy loads, swimming, running, and maneuvering in small boats. Their training also included handling explosives. Eventually, they evolved into Underwater Demolition Teams (UDT).

The UDTs were organized in 1943. Also known as frogmen, they were responsible during the Korean War for swimming to shore before an invasion and blowing up obstacles in their path, clearing the way for the amphibious U.S. invasion. They also destroyed important targets like bridges and tunnels.

In the 1960s, the Soviet Union's ally, North Vietnam, was fighting against a U.S. ally, South Vietnam. President Kennedy wanted to send in small teams of guerrilla fighters to help South Vietnam. With the Army's Green Beret unit already set up, it was time for the Navy to create its own Special Operations unit. Building on the training of the UDTs, the Navy SEALs (an acronym for Sea, Air, and Land) were created. Their training readied them for the work ahead in the jungles, coasts, and rivers of Vietnam. Their task was to go behind enemy lines and raid enemy camps, sabotage supplies, cut off enemy communications, and destroy stored ammunitions. They were very successful in their missions.

With the Vietnam War ending without victory, many cuts were made in military spending, and the number of Special Forces units were in many cases cut in half. The success of the SEALs in Vietnam, however, proved their value.

See the SEALs Virtual Museum for more background information.

Navy SEAL Training

SEAL beach training
SEAL beach training
Official U.S. Navy photo

Hooyah! -- the war cry of the Navy SEALs -- becomes an automatic response for SEALs during the torturous SEAL training. While there may be other variations in meaning, "hooyah" generally means "yes," "understood," and "I'm not letting this evolution get the best of me." (Evolution is the term used for each event in the training schedule.)

SEAL training is brutal. It takes over 30 months to train a Navy SEAL to the point at which he will be ready for deployment. The SEALs that emerge are ready to handle pretty much any task they could be called on to perform, including diving, combat swimming, navigation, demolitions, weapons, and parachuting. The training pushes them to the limit both mentally and physically in order to weed out those who may not be able to successfully complete the demanding missions and operations with which SEALs are faced. The types of stresses they endure during BUD/S (Basic Underwater Demolition/SEAL) are the same stresses they will endure as SEALs. If they can't withstand it when lives aren't on the line, chances are good they won't be able to withstand it when lives are at stake.

From day one in SEAL training, trainees are taught the importance of teamwork. Focus is not on the individual. The fact that the SEALs have never left another SEAL behind on a mission is a testament to this belief system. Throughout their training, they learn more and more why teamwork is necessary in the type of work they will soon be entering: SEALs are performing tasks that may not be possible for a single man to accomplish, but can be possible for a team composed of men who have the same training and skills. Their success depends on what they can do together as a team.

Navy SEAL Requirements

SEAL training
SEAL training
Official U.S. Navy photo.

Entering training to become a Navy SEAL is voluntary. Anyone can volunteer, and officers and enlisted men train side by side. In order to enter SEAL training, however, they do have to meet certain requirements. Those wishing to volunteer for SEAL training have to:

  • be an active-duty member of the U.S. Navy
  • be a man (women aren't allowed to be Navy SEALs)
  • be 28 or younger (although waivers for 29- and 30-year-olds are possible)
  • have good vision -- at least 20/40 in one eye and 20/70 in the other (corrective surgery is also possible)
  • be a U.S. citizen
  • pass the Armed Services Vocational Aptitude Battery (ASVAB)
  • Pass a stringent physical screening test that includes the following procedure: swim 500 yards in 12.5 minutes or less, followed by a 10-minute rest; do 42 push-ups in under two minutes, followed by a two-minute rest; do 50 sit-ups in under two minutes, followed by a two-minute rest; do six pull-ups, followed by a 10-minute rest; run 1.5 miles in boots and long pants in less than 11.5 minutes

Once a potential SEAL qualifies for training, the real fun starts.

SEAL Training: BUD/S

Basic Underwater Demolition/SEAL (BUD/S) training is divided into several phases:

  1. Indoctrination
  2. Basic Conditioning
  3. SCUBA training
  4. Land-warfare training

There is also the infamous Hell Week, which takes place toward the end of Basic Conditioning.

BUD/S lasts seven months. The initial indoctrination comprises five weeks of learning the expectations and ways of Navy SEALS. More important, it is a time to prepare physically and mentally for what's ahead.

Once indoctrination is complete, the remaining time is broken down into eight weeks of basic conditioning, eight weeks of SCUBA training, and nine weeks of land-warfare training. The training takes place at the Naval Amphibious Base at Coronado, CA.

BUD/S Training: Basic Conditioning

BUD/S obstacle course
BUD/S obstacle course
Official U.S. Navy photo

Basic Conditioning is when the going gets rough. This is the phase where most Drops on Request (DOR) happen. For eight weeks, trainees' days are filled with running, swimming, calisthenics, and learning small-boat operations. One-to-2 mile ocean swims and running the mother of all obstacle courses are daily, and timed, events. A trainee's time for these exercises must continuously improve.

Another important part of basic conditioning is drown-proofing. In this evolution, trainees must learn to swim with both their hands and their feet bound. To pass drown-proofing, trainees enter a 9-foot-deep pool and complete the following steps with their hands and feet tied:

BUD/S surf torture BUD/S surf torture
BUD/S surf torture
Photo courtesy U.S. Special Operations Command
  1. bob for 5 minutes
  2. float for 5 minutes
  3. swim 100 meters
  4. bob for 2 minutes
  5. do some forward and backward flips
  6. swim to the bottom of the pool and retrieve an object with their teeth
  7. return to the surface and bob five more times

Another evolution is surf torture, also called "cold water conditioning." The water temperatures usually hover around 65 degrees Fahrenheit (18 C), and never go above 68 degrees F (20 C). From there, trainees may be ordered to do some calisthenics or run a mile and a half down the beach in their wet clothes and boots. Then, they're ordered back into the surf. Many drills also require that teams carry their rubber boats over their heads as they run from one task to another.

BUD/S Training: Hell Week

BUD/S training
BUD/S training
Official U.S. Navy photo

The fourth week of Basic Conditioning is known as Hell Week. This is when students train for five days and five nights solid with a maximum total of four hours of sleep. Hell Week begins at sundown on Sunday and ends at the end of Friday. During this time, trainees face continuous training evolutions. During Hell Week, trainees get four meals a day -- sometimes MREs, but usually hot meals of unlimited quantities. Eating hot food is a substitute for being warm and dry. It gives a needed psychological boost to tired trainees, many of whom are nearly sleeping while they eat.

Pretty much every evolution during Hell Week involves the team (or boat crew) carrying their boat -- inflatable rubber Zodiacs -- over their heads. Timed exercises, runs, and crawling through mud flats are interspersed throughout the five-and-a-half days. The largest number of trainees drops out during Hell Week. This extreme training is critical, though. SEALs on missions must be able to operate efficiently, oblivious to sub-zero temperatures and their own physical comfort. Their lives, as well as the lives of others, may depend on it.

BUD/S seamanship training BUD/S seamanship training
BUD/S seamanship training
Official U.S. Navy photo

Listening closely to orders is another critical element of training during BUD/S, particularly during Hell Week when brains are getting fuzzy from lack of sleep. The instructor may purposely leave out part of an order to see who is really listening. For example, during a series of orders requiring trainee teams to do exercises using a 300-pound (136-kg) log, he may leave out mention of the log for one order. Team leaders who are paying attention will catch this, and their team gets a small break in the difficulty of the task by performing it without having to carry the log. The instructor might reward the team by allowing it to stand by the fire and rest, or sit and sleep for a few minutes.

BUD/S Training: SCUBA and Land Warfare

SEAL SCUBA training
SEAL SCUBA training
Official U.S. Navy photo


Since much of a SEAL's work is done underwater, SCUBA (self-contained underwater breathing apparatus) and combat swimming are top priorities for training.

SEALs train extensively for eight weeks in closed-circuit SCUBA systems and underwater navigation.

Land Warfare

During land-warfare training, SEALs train for nine weeks in intelligence-gathering and structure penetration, long-range reconnaissance and patrolling, and close-quarters battle. They are also trained to react to sniper attacks and to use "edged" weapons such as knives and other blades. SEALs must be able to drive any vehicle and be skilled in high-speed and evasive driving techniques. Hand-to-hand combat is also taught during this phase of training.

To be prepared for anything, they are taught the tactics small units must use, including handling explosives, infiltrating enemy lines, recovery (snatch-and-grab) techniques, and proper handling of prisoners. SEALs must also be able to survive in extreme environments and provide medical treatment (field medicine).

Advanced Navy SEAL Training

SEAL parachuting
SEAL parachuting
Official U.S. Navy photo

When BUD/S training is over, those remaining move on to basic parachute training at the Army Airborne School at Fort Benning, GA.

This training lasts for three weeks and is followed by SEAL Qualification Training (SQT). SQT is 15 more weeks of training to continue to improve basic skills and to learn new tactics and techniques required for assignment to a SEAL platoon.

It is after successful completion of the SQT that trainees are given their Naval Enlisted Code and awarded the SEAL Trident pin. They are now officially Navy SEALs.

SEAL Trident pin SEAL Trident pin
SEAL Trident pin
Official U.S. Navy photo

Hospital corpsmen require another 30 weeks of training at this stage.

Further training is provided in Special Reconnaissance and Direct Action, where SEALs learn more about completing tasks such as:

  • tactical ambushes
  • sniper assaults
  • close-quarters combat
  • underwater demolition
  • combat-swimming attacks
  • close air support
  • naval gunfire support
  • raids
  • hydrographic reconnaissance
Naval Special Warfare operators inspect a shipping container at Iraq's Mina Al Bakar Oil Terminal during an operation to secure the oil platform from being destroyed by Iraqi military. Naval Special Warfare operators inspect a shipping container at Iraq's Mina Al Bakar Oil Terminal during an operation to secure the oil platform from being destroyed by Iraqi military.
Naval Special Warfare operators inspect a shipping container at Iraq's Mina Al Bakar Oil Terminal during an operation to secure the oil platform from being destroyed by Iraqi military.
Official U.S. Navy photo Photographers Mate 1st Class Arlo K. Abrahamson

SEAL Assignments and Deployment

New SEALs report immediately to their operational units and begin 12 to 18 months of extensive individual-, platoon-, and squadron-level training in preparation for deployment with their SEAL platoon. This training/deployment cycle is repeated to make sure SEALs are constantly improving and learning new skills that can save lives and help missions succeed.

In the following sections, we'll take at look at some examples of SEAL missions.


Navy SEAL Counterterrorism Missions

Afghanistan, 2002: SEALs explore the entrance to a cave used by al-Qaeda and Taliban forces.
Afghanistan, 2002: SEALs explore the entrance to a cave used by al-Qaeda and Taliban forces.
Official U.S. Navy photo

While we may hear about some amazing SEAL missions, most of what they do is off the radar. The few missions that do make the evening news, however, show us just how hard -- and how important -- the SEALs' jobs are.


On January 6, 2002, during Operation Enduring Freedom (2001-2003), SEALs were sent to the landlocked country of Afghanistan in search of Osama Bin Laden and other terrorists hiding in the caves of Zawar Kili. What was supposed to be a 12-hour mission turned into an eight-day mission.

SEALs and other SOCOM (Special Operations Command) operators searched more than 70 caves over a 3-mile-long ravine near the Pakistani border. Their search turned up caches of weapons, ammunition, supplies, and a wealth of intelligence information. They survived the unexpectedly extended mission on supplies they found in the al-Qaeda camps.

SEALs discovered a large cache of munitions in one of more than 70 caves explored in the Zhawar Kili area of Afghanistan. SEALs discovered a large cache of munitions in one of more than 70 caves explored in the Zhawar Kili area of Afghanistan.
SEALs discovered a large cache of munitions in one of more than 70 caves explored in the Zhawar Kili area of Afghanistan.
Official U.S. Navy photo

According to Naval Special Warfare Command:

During Operation Enduring Freedom, Naval Special Warfare (NSW) forces carried out more than 75 special reconnaissance and direct-action missions, destroying more than 500,000 pounds of explosives and weapons; positively identifying enemy personnel and conducting Leadership Interdiction Operations in the search for terrorists trying to escape by sea-going vessels. NSW forces continue to operate in Afghanistan, routing out Taliban and other terrorist forces.

In the book Warrior Soul: The Memoir of a Navy SEAL, former SEAL Chuck Pfarrer describes how a mission to protect a U.S. Navy amphibious ship (at an undisclosed location) turned into the capture of would be-terrorists. As leader of his SEAL detachment, Pfarrer was responsible for securing the ship in port while its cargo of ammunition was unloaded.

After searching many fishing boats in the vicinity of the harbor, Pfarrer noticed a fishing boat coming into the area that didn't look like the others. He became suspicious and jumped into a Zodiac boat with two other SEALs, intending to search the slowly approaching boat. Maneuvering to prevent the boat from having access to the ship, they turned to face the boat head-on in order to force it to stop. Confirming their suspicions, the boat began increasing its speed.

The Zodiac was running side by side with the fishing boat, and Pfarrer was yelling "Halt!" -- but the boat's driver wouldn't stop. As the Zodiac got closer, one of the men in the boat began reaching under a fishing net for what looked like an AK-47. The Zodiac driver sharply turned and rammed the Zodiac into the fishing boat. Pfarrer pulled out his gun to fire a warning shot across the hull of the boat, but his gun jammed. He jumped into the fishing boat with the men, followed by the other two SEALs.

After a brief struggle, they tied up the men on the fishing boat. Looking beneath the nets, they found two large bundles of Yugoslavian-made TNT taped together with fuses ready, along with two AK-47s. Explosives of this type are designed to punch holes in a ship's steel hull. The men in the fishing boat were combat swimmers preparing to attach these explosives to the anchored U.S. Navy ship.

Navy SEAL Unconventional Warfare

During the Persian Gulf War (a.k.a. Operation Desert Storm, 1991), after a month of air attacks against Iraq, Allied forces were ready to move into Iraq-occupied Kuwait and begin the ground war. With 17,000 Marines in ships off the coast of Kuwait City, the Foxtrot platoon from SEAL Team One had the mission of creating a diversion. The plan was to make the Iraqis believe that Allied forces were planning an amphibious attack.

In the dark of night, the SEAL team approached the Kuwaiti shore in landing boats, stopping about 500 yards out and swimming the rest of the way in. Each SEAL towed a 20-pound case of explosives. Right under enemy noses, they planted the explosives on the Kuwaiti beach and swam back to their boats. The explosives were set to go off at 1 a.m.

As the land explosives went off, the SEALs fired automatic weapons and launched grenades, creating a huge amount of noise that caught the attention of the Iraqis. The noise, combined with the force of Marines seen off the coast, convinced the Iraqis that the attack was coming from the sea. They pulled two divisions from the front line and moved them to the coast, only to find the SEALs and the Marine diversion gone. The ground war began against a much weakened Iraqi force.

Navy SEAL Special Reconnaissance and Direct Action

In Somalia, on December 2, 1992, during Operation Restore Hope, Navy SEALs were needed to clear the path for a Marine landing to secure the Mogadishu airport. SEALs from Team One swam to shore, measuring water depth, shore gradient, and beach composition to create maps and secure the landing. A few days later, they explored the Mogadishu Harbor to determine if an adequate port for supply ships could be found. Unexpected problems came when they found that the water in the harbor was contaminated with raw sewage and other wastes. The SEALs completed their jobs, but some became sick from the mission.

The following day, when the Marine landing was taking place, SEALs, along with Marine Recon Units, swam ahead of the landing forces as scouts. What they found was media representatives, bright lights, and television cameras in their faces as they emerged from the water and walked onto the beach. The Marine landing went on, televised for all the world to see.

Direct Action

Also in Somalia, a SEAL sniper prevented a group of marines from being shot at by a Somali gunman.

It was reported that a SEAL sniper with an M88 .50 caliber sniper rifle spotted a Somali gunman ducking behind a rock wall. He believed that the gunman was getting his weapon ready to fire at approaching Marines, who were under orders to capture the Somali faction leader, Hussein Mohammed Aideed. The SEAL knew that he could not warn the Marines in time to avoid becoming targets. He fired his rifle, sending the bullet through the rock wall and taking down the gunman behind it.




Navy SEAL Gear

Navy SEALs require specialized clothing, equipment and weapons.
Navy SEALs require specialized clothing, equipment and weapons.
Official U.S. Navy photo

Like professionals in any other field, SEALs can only successfully do their jobs if they have the right tools. Their weapons, vehicles, and other gear can help them not only perform their missions, but also come out of those missions alive.


It isn't uncommon for SEALs to need clothing for varying temperatures and tasks. For example, when swimming to shore for a mission, the SEAL may need gear for extremely cold water temperatures as well as warmer land temperatures. For cold weather, clothing must prevent heat loss resulting from all sources, including radiation and evaporation. The SEAL must often generate heat through physical activity, and then vent it if he moves into a warmer location or begins to overheat due to extreme of exertion. Layering and ventilation allow for cooling and help keep perspiration from making clothing damp.


SEALs use handguns such as the 9mm SIG Sauer P226 and the MK23 MOD 0 45-caliber offensive handgun with a suppressor and laser-aiming module.

They use rifles such as the carbine automatic M4A1 5.56 mm and the AK-47. They also use shotguns, machine guns (MK43 and M2HB), and the HK MP5 9mm submachine gun series, among others. Add to that list sniper rifles such as the M88 .50 PIP and the M-14 sniper rifle, along with grenade launchers, mortars and AT4 anti-tank rockets, and SEALs can choose a weapon to fit the specific task at hand.

Navy SEAL Vehicles

North Arabian Gulf, 2002: U.S. Navy SWCC and SEALs on patrol in an MK V special operations craft
North Arabian Gulf, 2002: U.S. Navy SWCC and SEALs on patrol in an MK V special operations craft
U.S. Navy Photograph PHC (SW/NAC) Jerry Woller

Each vehicle that Navy SEALs use to transport teams and units to their destination has a specific benefit and utility.

One type of vehicle is the SEAL Delivery Vehicle. These are vehicles that operate below the surface of the water to deliver Navy SEALs and their equipment to their mission area. The crew uses underwater breathing apparatus for life support while navigating the submerged SDV to the destination. Remaining completely submerged the entire time, some models of SDVs can deliver several SEALs with their gear to their mission area, remain in the area while they complete the mission, and then return them to their ship.

There are several primary surface watercraft. They include the CRRC, the SOC-R, the 11-meter RHIB, and the MK V.

The MK V Special Operations Craft (SOC) is the most versatile, high-performance combatant craft in the Naval Special Warfare inventory. It is used primarily in medium-range ocean transport of SEAL combat swimmers in environments where the threat is low-to-medium. It is also used for some coastal patrol and maritime interdiction operations, such as destroying an enemy supply line. The MK V can operate from shore facilities or from specially equipped ships.

SEALs leaving an RHIB SEALs leaving an RHIB
SEALs leaving an RHIB
Official U.S. Navy photo

The NSW Rigid-hull Inflatable Boat (RHIB) is an 11-meter, high-speed, high-buoyancy, extreme-weather craft used for moving SEAL tactical elements to and from the ship and beaches. It is large enough to transport an entire SEAL squad.

The Special Operations Craft-Riverine (SOC-R) is Naval Special Warfare's newest surface craft. It is used in river environments and has a top speed of 42 knots. It holds up to 20,500 lbs (9,300 kg) of personnel and cargo and is well-suited to inland waterways. The SOC-R can be transported by U.S. Air Force cargo aircraft and by helicopter.

The Combat Rubber Raiding Craft (CRRC) is a 15-foot, heavily reinforced, inflatable rubber boat that is useful on many missions. This is the one trainees are carrying overhead during BUD/S training (it's often called a Zodiac -- Zodiac manufactures the CRRC). In deployment, it is used for over-the-horizon transportation and dropping and retrieving lightly armed SEALS on beaches and in rivers.

Official U.S. Navy photo

This boat is easy for the SEALS to move around and can even be launched from the air as a rubber duck, which is a CRRC bound on top of a wooden platform with a parachute attached.


Open-circuit System

An open-circuit system is the typical breathing system, where the diver breathes air from a supply tank and exhales exhaust into the water.

Closed-circuit Oxygen Systems

With this type of system, the diver breaths 100-percent oxygen, and his exhaled breath is recirculated within the apparatus, where it is filtered and turned back into breathable air. This system is useful for working in shallow water.

Oxygen time is reduced as the water gets colder. For diving in extremely cold water, SEALs must wear dry suits and a specially adapted version of the Dragger LarV rebreather -- a larger oxygen canister allows the diver to breathe underwater for a longer period of time.

Closed-circuit Mixed Gas System

This system is similar to the closed-circuit oxygen system described above, but the oxygen is mixed with air to maintain a certain "partial pressure of oxygen" (PPO2) level. This increases the depth to which a SEAL can dive and the length of time he can stay there.

See Special Gear Group: Dive and Swim for a look at some of this sea equipment.

Navy SEAL Jumps

Fast rope
Fast rope
Official U.S. Navy photo

When SEALs arrive from the air, they are often going to extremely difficult-to-reach places. In this case, they may jump from a plane into the ocean with their Zodiac, parachute into the area, or use fast-rope and rappelling techniques.

When parachuting, SEALs use either static-line or free-fall techniques. Free-fall techniques include High Altitude/Low Opening (HALO) jumps and the more difficult High Altitude/High Opening (HAHO) jumps (see Navy Air Equipment to learn about these types of jumps). High-altitude jumping requires oxygen and special equipment to ensure that the chute opens in the event the jumper blacks out, which is not that uncommon for high-altitude jumps. Goggles can shatter from the cold, and eyes can freeze shut, making the fall even more interesting. A device called an FF2 will automatically activate the jumper's rip cord if the chute hasn't opened at a preset altitude.

HAHO jumps, where chutes are deployed just a few seconds after the jump and SEALs form a "stack" to stay together, keep the SEALs in a tight group when they land. This is a difficult maneuver that requires a lot of training as a team. The lowest man in the formation uses a compass and landmarks to steer them to their destination.

Fast-rope and rappelling techniques require helicopters to drop SEALs by way of a rope to their location. Fast roping is a drop technique whereby a 50-to-90-foot (15-to-27-meter) rope is dropped from the helicopter, and SEALs slide down the rope using a Swiss seat harness. To brake, they apply their hands in a towel-wringing motion -- using their feet to brake would damage the rope.

Navy SEALs on Land

Once SEALs are on the ground, their equipment, like their clothing, must suit the particular environment. Mountain-climbing gear, snow shoes, land-navigation equipment, and the right vehicles are all critical to their success.

Camouflage netting for desert environments where there is little-to-no natural concealment can keep SEALs from becoming an enemy target. Dust goggles keep them from being blinded by flying sand, and CamelBak water packs allow them to drink while still having use of their hands.

Operations in jungle or wooded areas necessitate machetes to clear dense foliage as well as special netting and hammocks to ward off potentially lethal insect bites.

For all types of environments, SEALs carry a map, a compass and a handheld GPS receiver.

Navy SEAL Organization

SDV team at work
SDV team at work
Official U.S. Navy photo

Naval Special Warfare is comprised of SEAL teams, SEAL Delivery Vehicle Teams, and Special Boat Teams that are all deployed worldwide for a variety of operations.

Teams and Platoons

There are eight SEAL teams. Each team has six platoons and a headquarters element. SEAL platoons consist of 16 SEALs -- two officers, one chief, and 13 enlisted men. A platoon is generally the largest operational element assigned to a mission. The platoon may also be divided into two squads or four elements. Every member of a SEAL platoon is qualified in diving, parachuting, and demolitions.

The teams are split between the East Coast and West Coast of the United States. The odd-numbered teams fall under the command of Naval Special Warfare Group One and are based on the West Coast in Coronada, CA. The even numbered teams are under the command of Naval Special Warfare Group Two and are based on the East Coast in Little Creek, VA.

SDV Teams and NSW Units

There are other specialized teams of SEALs called SEAL Delivery Vehicle teams (SDVT). SDV teams operate in areas where it is too far out for a SEAL to swim and carry gear. Using underwater SDV watercraft, these teams increase the areas in which SEALs can operate. SDV teams usually deploy from submarines, but can also deploy from shore-based stations or surface ships.

There are two SDV teams. SEAL Delivery Vehicle Team ONE (SDVT-1) is based in Pearl Harbor, HA, and operates in the Pacific and Central geographic areas. SEAL Delivery Vehicle Team TWO (SDVT-2) is based at Little Creek, VA, and conducts operations throughout the Atlantic, Southern, and European areas.

There are also Naval Special Warfare Units based in locations around the world. These units have several responsibilities, including acting as training commands for SEALs and planning, coordinating and supporting the activities of SEAL platoons.

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