Dive Theory & Safety Standards Flashcards

What is the maximum recreational scuba diving depth limit according to PADI standards?

Answer: 40 meters / 130 feet

PADI sets the recreational scuba diving depth limit at 40 meters (130 feet). Dives beyond this depth require technical diving training and equipment.

Does PADI's Recreational Dive Planner (RDP) specify a minimum surface interval between dives?

Answer: No minimum surface interval is specified by the RDP

The RDP does not specify a minimum surface interval. Divers must complete the required surface interval to reduce their pressure group before the next dive.

What does the term 'pressure group' refer to in recreational dive planning?

Answer: A letter designation indicating residual nitrogen in the body

A pressure group is a letter designation (A through Z) used with the RDP to track residual nitrogen levels in a diver's body between repetitive dives.

Which factor does NOT directly affect a diver's nitrogen absorption rate?

Answer: Water temperature at the surface

Surface water temperature does not directly affect nitrogen absorption. The primary factors are depth (partial pressure of nitrogen) and time at depth.

What is oxygen toxicity and at what partial pressure of oxygen does it become a concern for recreational divers?

Answer: Excess oxygen causing convulsions; above 1.4 bar PO2

Oxygen toxicity occurs when the partial pressure of oxygen (PO2) exceeds safe limits, potentially causing convulsions. Recreational diving limits PO2 to 1.4 bar maximum.

What is the proper first aid response if a diver surfaces with signs of decompression sickness (DCS)?

Answer: Have the diver breathe pure oxygen and seek emergency medical care

DCS treatment requires the diver to breathe 100% oxygen and receive emergency medical care, including transport to a hyperbaric chamber if needed.