Surfing is a classic water sport where individuals ride a surfboard on the surface of waves, using their body weight and skill to maneuver.

Decompression is the process of slowly ascending from a dive to allow the body to adjust to the decreasing pressure, preventing decompression sickness.

Triathlon is a multi-sport event consisting of swimming, cycling, and running in sequence, testing athletes' endurance and versatility.

Windsurfing involves standing on a board with a sail attached, using the wind to propel oneself across the water.

Sit-on-top kayaks are characterized by an open cockpit design, allowing paddlers to sit on top of the kayak rather than inside it.

Hydrofoiling involves using a board with a hydrofoil attached to the bottom, which generates lift when moving through the water, allowing riders to glide above the surface.

Apnea is the voluntary suspension of breathing, allowing freedivers to remain underwater for extended periods without the use of scuba gear.

Canoeing involves paddling a canoe, a long, narrow boat with an open cockpit, using a single-bladed paddle.

Kitesurfing involves using a kite to generate lift and propel oneself across the water while standing on a board.

Sheets are the ropes used to control the sails of a boat, allowing sailors to adjust the angle and position of the sails to harness the wind.

Bodyboarding involves riding a small, buoyant board without a sail, using one's body to catch and ride the waves.

Scuba gear refers to the equipment used for scuba diving, including the tank, regulator, buoyancy compensator device, and other essential components.

Kayaking involves paddling a kayak, a long, narrow boat with a closed cockpit, using a double-bladed paddle.

Stand-up paddleboarding involves standing on a long, wide board and using a long pole to propel oneself through the water.

Halyards are the ropes used to raise and lower the sails of a boat, allowing sailors to adjust the sail area and position.