Dive Terminology for Diving in Cozumel

Scuba diving means swimming underwater while breathing from a tank using specialized dive equipment. In Cozumel, scuba diving usually means guided boat dives over coral reefs, walls, and drift dive sites.

A certified diver has completed formal scuba training and can join regular certified dives within their training limits. If you are not certified yet, start with dive courses in Cozumel.

Open Water Diver is the first full recreational scuba certification level. It allows divers to join many guided Cozumel reef dives, although easier sites are better for newer divers. See the PADI Open Water Diver course in Cozumel.

Advanced Open Water Diver is a continuing education certification that helps divers build experience with deeper dives, navigation, buoyancy, and specialty diving. It can be useful for Cozumel wall dives and deeper sites. See the Advanced Open Water Diver course.

Discover Scuba Diving is an introductory scuba experience for people who are not yet certified. In Cozumel, it is usually done under close instructor supervision at beginner-friendly conditions and is not the same as a full certification.

A refresher dive helps certified divers rebuild comfort after time away from diving. It is especially useful before Cozumel drift dives if you have not dived recently or feel unsure about buoyancy, equipment, or boat procedures.

A fun dive is a recreational guided dive for certified divers, not a training dive. In Cozumel, fun dives often mean boat dives to reef sites such as Palancar Gardens, Yucab Reef, or Paso del Cedral.

A two-tank dive is a trip with two separate dives, usually with a surface interval between them. This is one of the most common ways certified divers experience Cozumel’s reefs in a single morning or afternoon.

A boat dive starts from a dive boat instead of from shore. Most famous Cozumel dive sites are reached by boat because many reef areas are offshore and selected based on conditions, diver level, and marine park rules.

A shore dive starts from land rather than a boat. Cozumel is mostly known for boat diving, but some shore-access areas such as Playa Corona and Money Bar Reef may interest divers and snorkelers.

A dive briefing is the explanation before a dive. In Cozumel, the briefing should cover the dive site, current, depth, marine park rules, hand signals, entry method, exit procedure, and what to do if separated.

The buddy system means divers look out for each other before, during, and after the dive. Even on guided Cozumel drift dives, good buddy awareness is important for safety and comfort.

A dive guide leads certified divers underwater, manages the group, and helps with site navigation. In Cozumel, an experienced guide is especially useful because currents, reef layout, and site selection can change daily.

A Divemaster is a professional-level diver who can guide certified divers and assist with training. Many Cozumel dive boats use Divemasters to lead reef dives and manage drift diving groups.

A scuba instructor teaches certification courses and introductory scuba programs. If you want to learn to dive in Cozumel, choose an instructor and dive center that match your experience, schedule, and comfort level.

Drift diving means diving with the current instead of fighting against it. Cozumel is famous for drift diving because many reef dives naturally carry divers along the reef. Learn more in the Cozumel drift diving guide.

Current is moving water. In Cozumel, current can make dives feel smooth and effortless, but it can also become stronger depending on the site and day. Current is one reason good dive briefings matter.

Mild current is gentle water movement that can make drift diving enjoyable and easy. Many newer divers prefer mild-current days when learning how Cozumel drift diving feels.

Strong current means faster water movement that requires more awareness and control. Advanced sites, northern reefs, and certain wall dives may be more affected by strong current, depending on conditions.

A downcurrent is water movement that can push a diver downward. It is a serious condition divers should understand, especially near walls and drop-offs. Follow the guide and avoid sites beyond your experience level.

An upcurrent can push a diver upward. Divers should control buoyancy carefully, monitor depth, and follow guide instructions if vertical water movement is present.

Live boat pickup means the boat follows the divers and collects them where they surface. This is common in Cozumel because drift dives often finish away from the original entry point.

A surface marker buoy is an inflatable marker used to show a diver’s position at the surface. In drift diving destinations like Cozumel, SMBs can be important for visibility and boat pickup procedures.

A negative entry means entering the water and descending quickly without floating at the surface first. It may be used in stronger current, but it requires comfort, readiness, and proper instruction from the dive guide.

The entry point is where divers enter the water. In Cozumel, the entry point is chosen based on the reef, current, boat position, and planned drift direction.

The exit point is where divers finish the dive and surface. On Cozumel drift dives, the exit point is often different from the entry point because the current moves divers along the reef.

A group drift means the dive group moves with the current together. Staying with the group is important in Cozumel because separation can happen quickly if divers stop, swim away, or lose visual contact.

A reef drift is a drift dive over or alongside a coral reef. Many Cozumel sites, including Yucab Reef, Tormentos Reef, and Paso del Cedral, may be experienced this way.

Staying with the group means maintaining a safe distance from your buddy and dive guide. In Cozumel drift diving, this is one of the most important habits for safety, navigation, and boat pickup.

A reef is an underwater ecosystem built around coral, rock, sponges, and marine life. Cozumel’s diving is centered around reef systems, including sites listed in the Cozumel Dive Sites Guide.

A coral reef is a living underwater structure formed by coral colonies and other marine organisms. Cozumel’s reefs support fish, turtles, rays, sponges, corals, and many small reef creatures.

A wall dive follows a reef wall or steep drop-off. Cozumel wall dives include Santa Rosa Wall, San Francisco Wall, and Villa Blanca Wall.

A drop-off is where the reef descends sharply into deeper water. Cozumel wall sites may include dramatic drop-offs, so divers should monitor depth carefully and stay within certification limits.

A reef slope is a gradual underwater incline rather than a vertical wall. Reef slopes can be easier for divers who want structure and marine life without the depth exposure of a steep wall.

A coral garden is an area with attractive coral formations and reef life. In Cozumel, Palancar Gardens is one of the best-known examples linked to this type of scenery.

A swim-through is a natural passage in the reef that divers can pass through when conditions and experience allow. Cozumel sites associated with swim-throughs include Palancar Caves, Palancar Bricks, and Devil’s Throat.

An overhang is part of a reef or wall that extends outward above open space. Overhangs can create shade, shelter marine life, and add visual drama to wall and reef dives.

A ledge is a shelf or horizontal feature in the reef structure. Divers may look around ledges for small marine life, hiding fish, lobsters, moray eels, and other reef creatures.

A sand channel is a sandy pathway or gap between reef structures. In Cozumel, sand channels can help divers navigate reef formations and understand the layout of a dive site.

A shallow reef is a reef area at easier depths, often better suited for beginners, training, or relaxed dives. Cozumel shallow reef examples include Paradise Reef, Chankanaab Shallow Reef, and Columbia Shallows.

A deep reef is a reef site or section at greater depth. Cozumel deep reef examples include Colombia Deep, Maracaibo Reef, and Punta Sur.

A wreck dive is a dive on or around a sunken ship, aircraft, or structure. In Cozumel, the best-known wreck dive is the C-53 Felipe Xicoténcatl shipwreck.

An artificial reef is a man-made structure that becomes habitat for marine life over time. Wrecks such as the C-53 can function as artificial reef structures when marine life colonizes them.

A marine park is a protected ocean area with rules designed to conserve reefs and marine life. Much of Cozumel’s diving is connected to protected reef areas where divers must follow local regulations.

Visibility means how far you can see underwater. Cozumel is known for strong visibility, but it changes with weather, current, season, and site conditions. Read the Cozumel visibility guide.

Surge is back-and-forth water movement caused by waves. It can be more noticeable in shallow areas or rough conditions and may affect shore diving, entries, exits, and reef photography.

A thermocline is a layer where water temperature changes noticeably. It is less central to most Cozumel reef dives than current and visibility, but divers may still notice temperature changes at depth.

The splendid toadfish is one of Cozumel’s signature marine-life species. Divers usually look for it in holes, crevices, and reef ledges, but sightings are never guaranteed. Learn more in the Splendid Toadfish Cozumel Guide.

A spotted eagle ray is a graceful ray with wing-like fins and a spotted back. In Cozumel, eagle ray interest is strongest during the cooler season, especially when conditions are favorable. See the Eagle Ray Season in Cozumel Guide.

Green sea turtles are one of the turtle species divers may see in Cozumel. They can appear around reef areas and seagrass habitats, but all sightings depend on natural behavior and conditions.

Hawksbill turtles are reef-associated turtles with a pointed beak-like mouth. Divers may encounter turtles around Cozumel reefs, but they should never touch, chase, block, or crowd them.

Nurse sharks are bottom-oriented sharks that may rest near reef ledges, sandy areas, or under coral structures. They are one of the shark species divers may occasionally encounter in Cozumel.

Southern stingrays are flat rays that often rest or move along sandy bottoms. In Cozumel, divers may see rays near sand channels, reef edges, or shallow areas depending on the site and conditions.

Moray eels are long reef predators often seen with their heads extended from holes or crevices. Cozumel divers may see green morays, spotted morays, or other eel species around reef ledges and coral heads.

A green moray is a large moray eel that may be seen resting in reef openings or swimming across the reef. Divers should observe from a respectful distance and avoid putting hands near holes or ledges.

A spotted moray is a smaller moray eel with patterned markings. It may hide in reef cracks, coral holes, and ledges, making slow observation and good buoyancy important for spotting it.

Caribbean spiny lobsters are often seen tucked under ledges or moving across the reef at night. Cozumel night dives and reef ledges can be good places to notice lobster behavior.

Queen angelfish are colorful reef fish with bright blue and yellow markings. They are part of the visual appeal of Cozumel reef diving and may be seen around coral-rich areas.

French angelfish are dark-bodied reef fish with yellow accents. Divers may see them in pairs around Cozumel reefs, especially near coral structure and sponge-covered areas.

Stoplight parrotfish are colorful reef fish that graze on algae and contribute to reef ecology. Parrotfish are commonly seen on Caribbean reefs and are part of Cozumel’s reef fish diversity.

Blue tangs are bright blue reef fish often seen moving around coral reefs. They are common in Caribbean reef ecosystems and help add color and movement to Cozumel dives.

Sergeant majors are small striped fish often seen in groups near reefs, boats, or shallow water. They are easy to recognize by their bold vertical stripes.

Queen triggerfish are colorful reef fish with distinctive shapes and patterns. They may be seen around coral reefs and sandy edges, depending on the dive site and conditions.

Barracuda are long, silver predatory fish that may hover near reef edges or open water. In Cozumel, divers may see barracuda around reef systems and stronger-current areas.

Groupers are large reef fish often seen near coral heads, ledges, or deeper reef structure. They are part of Cozumel’s reef ecosystem and can be especially impressive because of their size.

Snappers are schooling or reef-associated fish often seen around coral structure and ledges. They are common in Caribbean reef environments and may appear throughout Cozumel reef dives.

Grunts are reef fish often seen in schools under ledges or near coral structure. Their schooling behavior can create dense clusters of fish around Cozumel reefs.

Filefish are small, laterally compressed reef fish that can blend into coral and sponge environments. Divers with good observation skills may notice them around reef structure.

Trunkfish are box-shaped reef fish with distinctive patterns. They often move slowly near coral and are popular with divers who enjoy smaller reef creatures.

Pufferfish are rounded reef fish known for their ability to inflate when threatened. Divers should never harass or stress them; observe calmly and keep a respectful distance.

Porcupinefish are related to pufferfish and have visible spines. They may be seen near reefs, ledges, or sandy areas and should be observed without touching or disturbing them.

Octopus are intelligent, color-changing reef animals often hidden during the day and more active at night. Cozumel night dives can increase the chance of seeing octopus behavior.

Squid may be seen in open water or near reef areas, often moving in small groups. They are fast, alert, and interesting to observe when visibility and lighting are good.

Flamingo tongues are small marine snails often found on sea fans and soft corals. They are tiny but highly photogenic, making them a favorite detail for observant divers and underwater photographers.

Sea urchins are spiny reef animals found on rocks, coral, and sandy areas. Divers should avoid contact because spines can injure skin and because touching reef life damages the ecosystem.

Sea cucumbers are slow-moving bottom animals that help process sand and organic material. They are part of the reef ecosystem and should not be touched or moved.

Cleaner shrimp are small crustaceans that may remove parasites from fish. They often live near reef crevices and cleaning stations, where patient divers may notice fish coming in for cleaning behavior.

Arrow crabs have long, thin legs and pointed bodies. They are often found in reef cracks, sponge areas, or under ledges and are easier to notice when divers slow down and look closely.

Christmas tree worms are small, colorful tube worms that retract quickly when approached. They are common on coral heads and are a good reason to move slowly and avoid touching the reef.

Hard coral builds the structure of many coral reefs. In Cozumel, hard corals help form reef walls, coral heads, swim-throughs, and habitats for reef fish and small marine life.

Soft corals are flexible coral-like animals that move with the water. They add motion and texture to Cozumel reefs and can be important shelter for small reef species.

Brain coral is a hard coral named for its grooved, brain-like pattern. It is commonly associated with Caribbean reef environments and adds structure to coral gardens and reef slopes.

Star coral is a hard coral type found in Caribbean reef systems. It contributes to reef-building structure and provides habitat for fish, invertebrates, and other reef life.

Elkhorn coral is a branching coral type historically important in Caribbean reefs. Divers should never touch, kick, or stand near branching coral because it is fragile and easily damaged.

Staghorn coral is another branching coral associated with Caribbean reef systems. Its structure can provide habitat for small fish, but it is delicate and requires careful buoyancy from divers.

Sea fans are flat, fan-shaped soft corals that sway in the current. Cozumel’s drift conditions can make sea fans visually striking as divers move along the reef.

Sea plumes are soft coral-like structures that add vertical texture to reef scenes. They are part of the visual character of Caribbean reef dives and should be protected from fin contact.

Barrel sponges are large sponge formations that can look like underwater barrels or tubes. They are common visual features on many Caribbean reefs and are important habitat for small organisms.

Tube sponges are sponge structures shaped like tubes or vases. They add color and dimension to reef walls and slopes, especially in areas with strong water movement.

Rope sponges grow in long, rope-like forms and can be seen on reef structures. They contribute to Cozumel’s reef texture and provide habitat for small marine life.

A coral head is an isolated coral structure or cluster. In Cozumel, coral heads can shelter fish, lobsters, moray eels, cleaner shrimp, and smaller reef creatures.

A reef ledge is an overhanging or shelf-like part of the reef. Divers often look under ledges for nurse sharks, lobsters, moray eels, and other hidden marine life.

The reef crest is a higher-energy part of a reef exposed to more wave or water movement. It can be important for reef health but may not always be part of standard Cozumel dive routes.

Coral bleaching happens when stressed coral loses the algae that gives it color and energy. Divers can help reduce local reef stress by maintaining buoyancy, not touching coral, and following marine park rules.

No-touch diving means never touching coral, sponges, turtles, rays, fish, or other marine life. This is essential in Cozumel because healthy reefs depend on careful diver behavior.

Buoyancy is your ability to control whether you rise, sink, or stay level underwater. Good buoyancy is especially important in Cozumel because drift diving happens over delicate coral reefs.

Neutral buoyancy means staying at the same depth without sinking or floating upward. It helps divers avoid damaging coral and makes Cozumel drift dives smoother and safer.

Positive buoyancy means you float upward or stay on the surface. Divers use positive buoyancy at the surface for safety, comfort, and boat pickup.

Negative buoyancy means you sink. Divers may use controlled negative buoyancy during descent, but too much negative buoyancy can increase reef contact risk and make depth control harder.

Trim is your body position in the water. Good horizontal trim helps divers move efficiently, avoid stirring sand, and reduce the chance of kicking coral on Cozumel reefs.

Weighting means using the right amount of weight to descend and control buoyancy. Proper weighting helps prevent uncontrolled ascents, heavy descents, and reef contact.

Descent is the controlled movement from the surface down to depth. In Cozumel, descents may be affected by current, so divers should be ready before entering and follow the guide’s instructions.

Ascent is the controlled movement from depth back toward the surface. Divers should ascend slowly, monitor their computer, and complete safety stops when required or recommended.

A safety stop is a pause near the end of a dive, usually done at shallow depth. It helps reduce risk after recreational dives and is a standard part of safe dive practice.

Bottom time is the amount of time spent underwater from descent to ascent. It is affected by depth, air consumption, current, dive plan, and no-decompression limits.

A surface interval is the time spent at the surface between dives. On Cozumel two-tank trips, the surface interval usually happens between the first and second dive.

No-decompression limit is the maximum time a diver can stay at a given depth without requiring decompression stops. Dive computers help track NDL during Cozumel dives.

A dive profile is the pattern of depth and time during a dive. Cozumel wall dives, shallow reefs, and multilevel reef dives can all have different dive profiles.

Maximum depth is the deepest point reached during a dive. In Cozumel, maximum depth depends on the site, certification level, dive plan, and diver comfort.

A multilevel dive starts deeper and gradually moves shallower. Many reef dives naturally become multilevel when divers follow reef structure and finish at a shallower depth.

Air consumption is how quickly a diver uses breathing gas. It is affected by fitness, experience, current, depth, stress, buoyancy, and breathing control. Read the air consumption tips for divers.

Nitrox is a breathing gas with more oxygen and less nitrogen than normal air. It can be useful for repetitive diving, but divers need proper certification and must follow oxygen exposure limits.

A marine park fee is a charge connected to diving in protected reef areas. Cozumel marine park fees can change, so always confirm current requirements before diving. Read the Cozumel Marine Park Fees Guide.

A pickup point is the location where the boat collects divers before or after a dive. In Cozumel, pickup points may depend on the operator, hotel, pier, marina, or dive schedule.

A marina is a boat harbor where dive boats may depart. Some Cozumel dive centers use marina departures, while others may operate from hotels, piers, or beach locations.

Hotel pickup means the dive operator collects divers from or near their accommodation. Availability depends on the operator and hotel location, so it should always be confirmed directly.

A fast boat is a smaller or quicker dive boat designed to reduce travel time to dive sites. Some divers prefer fast boats for efficiency, while others prefer larger boats for comfort.

Small-group diving means diving with fewer guests per guide or boat. In Cozumel, this can be valuable for photographers, nervous beginners, experienced divers, and people who want a more personal experience.

A private guide is a dedicated guide for one diver, couple, family, or group. This can help beginners, photographers, families, or divers who want more personalized support.

A back roll entry is a common boat entry where divers sit on the edge and roll backward into the water. It is often used from smaller dive boats.

A giant stride entry means stepping forward into the water from a stable platform while holding mask and regulator. It is more common from larger boats, docks, or platforms.

A tank change happens between dives when divers switch from an empty or partly used tank to a full one. This usually happens during the surface interval on two-tank trips.

Rental gear is scuba equipment supplied by a dive center for guest use. Availability, sizing, quality, and price vary, so confirm details before booking. See the Cozumel gear rental guide.

A dive package is a bundle of dives, courses, or services. Since Cozumel package details can change, use package information as a planning tool and confirm current inclusions directly with the operator.

A cancellation policy explains when refunds, changes, or credits are allowed. Always check cancellation terms before booking Cozumel dives, especially during cruise visits, short trips, or storm season.

Cruise ship diving means planning a dive around a cruise ship schedule. Timing, transportation, and return buffer are critical. Read the Cozumel cruise ship diving guide.

A BCD, or buoyancy control device, is the vest-like equipment divers use to control buoyancy. It holds the tank and allows divers to add or release air during the dive.

A regulator delivers breathing gas from the scuba tank to the diver. It reduces tank pressure so the diver can breathe comfortably underwater.

An octopus is the backup second-stage regulator used for air-sharing. It is also called an alternate air source and is an important part of emergency procedures.

An alternate air source is a backup breathing source used if a buddy needs air. Divers should know where it is, how to donate it, and how to use it before entering the water.

An SPG, or submersible pressure gauge, shows how much air remains in the scuba tank. Divers should check it often, especially during drift dives where returning to a fixed point is not the plan.

A dive computer tracks depth, time, ascent rate, no-decompression limits, and safety stop information. It is one of the most important safety tools for repetitive Cozumel dive days.

A scuba tank holds the breathing gas used during a dive. In Cozumel, tank type and size may vary by operator, diver needs, and dive plan.

An aluminum tank is a common scuba tank type used by many dive operators. It has different buoyancy characteristics than steel, which can affect weighting and comfort.

A steel tank is another scuba tank type that can provide different buoyancy and capacity characteristics. Some experienced divers prefer steel tanks, but availability depends on the operator.

A mask lets divers see clearly underwater by creating an air space in front of the eyes. A well-fitting mask is one of the most important comfort items for Cozumel diving.

Fins help divers move efficiently underwater. In Cozumel drift diving, fins are used more for control, positioning, and small adjustments than for fighting the current.

A wetsuit provides thermal protection and helps prevent minor scrapes. The right thickness depends on Cozumel water temperature, season, dive duration, and personal comfort.

A rash guard is lightweight exposure protection used for sun, minor abrasion, or warm-water comfort. Some divers use it instead of a wetsuit during warmer Cozumel months.

A weight belt holds lead weights to help a diver descend and maintain proper buoyancy. Correct weighting is essential for reef protection and safe ascents.

Integrated weights are weights placed into pockets on the BCD instead of on a separate belt. Many divers find them more comfortable, but they must know how to release them in an emergency.

A dive light is used for night dives, swim-throughs, wrecks, or looking under ledges. In Cozumel, lights can help reveal color and small marine life even during daytime dives.

Reef-safe sunscreen refers to sun protection designed to reduce harm to marine environments. Divers should also use shade, rash guards, and careful application to help protect Cozumel reefs.

PADI is one of the world’s major scuba training agencies. Many Cozumel dive centers offer PADI courses, including Open Water, Advanced Open Water, Rescue Diver, and specialty training.

SSI is another major scuba training agency. Some dive centers may offer SSI courses or accept SSI-certified divers for guided recreational dives.

eLearning is the online theory portion of a scuba course. It can help students complete classroom-style work before arriving in Cozumel, saving vacation time for water training.

A referral course allows a student to complete part of their training in one location and finish the open water dives elsewhere. This can be useful for travelers who want to complete final training dives in Cozumel.

Confined water training happens in a pool or pool-like environment where students learn basic scuba skills. It is usually part of beginner certification courses before open water dives.

Open water dives are training dives done in a natural body of water. In Cozumel, beginner students may complete open water training dives under instructor supervision.

A certification card proves that a diver has completed a scuba certification. Dive centers usually ask to see proof of certification before allowing regular certified dives.

A logbook records previous dives, including date, site, depth, time, and conditions. It helps divers track experience and can help operators understand a diver’s background.

A specialty course focuses on a specific scuba skill or diving environment, such as deep diving, nitrox, buoyancy, night diving, drift diving, or underwater photography.

Rescue Diver is a continuing education course focused on problem prevention, emergency response, and helping other divers. It is a valuable step for divers who want stronger safety awareness.

Divemaster training is the first professional level in many scuba training systems. It is designed for experienced divers who want to guide dives, assist instructors, and work in the dive industry.

Nitrox certification teaches divers how to use enriched air safely. It can be useful for repetitive dive days, but divers must understand oxygen limits and analyzer procedures.

Peak Performance Buoyancy is a specialty course focused on improving buoyancy control, trim, weighting, and efficiency. These skills are especially useful for protecting Cozumel reefs.

An underwater photography course teaches divers how to use cameras while maintaining buoyancy, awareness, and reef-safe behavior. Cozumel’s visibility and reef scenery make photography training appealing.

Equalization means balancing pressure in the ears and sinuses during descent. Divers must equalize early and often to avoid pain or injury, especially when descending from a boat in Cozumel.

Ear barotrauma is an ear injury caused by pressure changes, usually from poor equalization. Divers should never force descent if they cannot equalize comfortably.

Decompression sickness is a dive-related injury caused by nitrogen bubbles forming in the body after diving. Divers reduce risk by staying within limits, ascending slowly, and following computer guidance.

DCS stands for decompression sickness. It is sometimes called “the bends” and requires medical attention. Dive insurance and conservative dive planning are important for any dive trip.

Nitrogen loading refers to nitrogen absorbed by the body during dives. Repetitive dives, deeper dives, and shorter surface intervals increase nitrogen loading, which is why dive computers and conservative planning matter.

An emergency ascent is an ascent made because of a serious problem, such as an out-of-air situation. Divers learn emergency ascent procedures during certification and should review them if rusty.

An out-of-air procedure is the response when a diver runs out of breathing gas. It usually involves signaling a buddy, sharing air, and making a controlled ascent.

Dive insurance can help cover diving-related emergencies, evacuation, and hyperbaric treatment depending on the policy. It is strongly recommended for Cozumel and any other dive destination.

A hyperbaric chamber is used to treat certain dive-related injuries such as decompression sickness. Divers should know emergency procedures and carry proper insurance before diving.

A recompression chamber is another term for a hyperbaric chamber used in dive medicine. It is part of emergency treatment planning for serious decompression-related problems.

Seasickness is motion sickness caused by boat movement. Some Cozumel divers experience it on rougher days or smaller boats. Read the Cozumel seasickness guide.

Flying after diving requires waiting long enough after your final dive to reduce decompression risk. The safe interval depends on your dive profile and number of dives. Read the Flying After Diving in Cozumel Guide.

A dive medical form helps identify health conditions that may require medical clearance before diving. Beginners and course students may be asked to complete one before training or diving.