Recreational scuba diving is generally limited to a maximum depth of 18 meters (60 feet) to minimize the risk of decompression sickness (DCS).

A dive computer is an electronic device that measures depth and time underwater, and uses this information to calculate decompression stops and monitor air pressure in the tank.

The recommended ascent rate for scuba diving is 10 meters (33 feet) per minute to minimize the risk of decompression sickness (DCS).

A safety stop is a mandatory pause during a scuba dive, typically at a depth of 5 meters (16 feet) for 3-5 minutes, to allow the body to adjust to the change in pressure and reduce the risk of decompression sickness (DCS).

The recommended minimum surface interval between scuba dives is 2 hours to allow the body to rest and replenish its oxygen stores.

A dive flag is a brightly colored flag that is displayed on a boat or buoy to signal to other boats that there are divers in the area.

The recommended maximum pressure for a scuba tank is 200 bar (2900 psi) to minimize the risk of tank rupture.

A buoyancy compensator device (BCD) is a vest-like device that is worn by scuba divers to control their buoyancy underwater.

The recommended minimum visibility for scuba diving is 10 meters (33 feet) to ensure that divers can see clearly underwater.

A dive buddy is another diver who accompanies a diver underwater to provide assistance in case of an emergency.

The recommended maximum dive time for a recreational scuba dive is 60 minutes to minimize the risk of decompression sickness (DCS).

A pre-dive safety check is a mandatory procedure that is performed before every scuba dive to ensure that all equipment is functioning properly.

The recommended maximum ascent rate for a scuba dive is 10 meters (33 feet) per minute to minimize the risk of decompression sickness (DCS).

A dive log is a record of dive details, such as date, time, location, depth, and dive time, that is kept by scuba divers for future reference.

The recommended minimum age for scuba diving is 12 years old, as determined by most scuba diving organizations.