The minimum age requirement for most scuba diving courses is 12 years old.

The most common scuba diving certification level is Open Water Diver.

The purpose of a buoyancy control device (BCD) is to control buoyancy.

The maximum depth that a recreational scuba diver is allowed to dive is 30 meters (98 feet).

The recommended minimum number of dives for an Open Water Diver certification is 4 dives.

The purpose of a dive computer is to measure depth, time, and calculate decompression stops.

The buddy system in scuba diving is diving with a partner.

The purpose of a pre-dive safety check is to ensure that all equipment is functioning properly, the diver is properly weighted, and the diver is properly hydrated.

The recommended maximum ascent rate for a recreational scuba diver is 10 meters (33 feet) per minute.

The purpose of a dive flag is to mark the location of a diver and to warn other boaters of the presence of divers.

The recommended minimum surface interval between dives is 1 hour.

The purpose of a dive log is to record dive details and to track dive experience.

The recommended maximum number of dives per day for a recreational scuba diver is 2 dives.

The purpose of a divemaster is to lead guided dives, assist with scuba diving courses, and supervise scuba diving activities.

The purpose of a scuba diving instructor is to teach scuba diving courses, certify scuba divers, and lead guided dives.