PADI Wreck & Cave Diving Fundamentals 5 — Questions and Answers
Question 1: What is the purpose of a 'safety reel' (also called a 'gap reel') carried by cave divers?
- To extend the main penetration guideline when the primary reel runs out
- To bridge a gap between two existing guidelines when a section of line is missing (Correct answer)
- To mark the maximum depth reached during the dive
- To serve as a tow line if a diver becomes incapacitated
Correct answer: To bridge a gap between two existing guidelines when a section of line is missing
A gap reel allows a diver to connect across a section where the permanent guideline is missing or broken, maintaining a continuous exit path.
Question 2: Which PADI specialty prerequisite is required before enrolling in the PADI Cave Diver course?
- PADI Rescue Diver and PADI Wreck Diver
- PADI Cavern Diver and PADI Intro to Cave Diver (or equivalent) (Correct answer)
- PADI Advanced Open Water and PADI Night Diver
- PADI Master Scuba Diver rating
Correct answer: PADI Cavern Diver and PADI Intro to Cave Diver (or equivalent)
The PADI Cave Diver course requires completion of both Cavern Diver and Introduction to Cave Diver courses to build skills progressively.
Question 3: What is 'flow' in the context of cave diving, and why is it important for gas planning?
- The tidal movement of water through sea caves that must be tracked
- The direction of water current inside a cave which affects gas consumption and penetration distance (Correct answer)
- The measurement of visibility reduction over time during a dive
- The rate at which a diver's exhaust bubbles dislodge ceiling sediment
Correct answer: The direction of water current inside a cave which affects gas consumption and penetration distance
Diving against flow on the way out requires more effort and gas; divers must plan gas reserves accounting for an exit against current.
Question 4: Inside a wreck, a diver notices lines tied around structural features in multiple directions with no arrows. What should the diver do?
- Follow the thickest line which leads to the main exit
- Stop penetration, carefully return to the entry point, and exit the wreck (Correct answer)
- Place their own arrows to mark the exit direction
- Ascend to the highest point of the interior and look for light
Correct answer: Stop penetration, carefully return to the entry point, and exit the wreck
Confusing or unmarked lines indicate a poorly mapped or multi-team environment; the safest response is to abort and exit.
Question 5: Which type of buoyancy position is recommended for navigating through tight wreck or cave restrictions?
- Feet-down vertical position to control descent through the restriction
- Horizontal trim with hands forward and fins raised (Correct answer)
- Back-inflate BCD deflated fully before entry
- Head-up semi-vertical position to see the restriction clearly
Correct answer: Horizontal trim with hands forward and fins raised
Horizontal trim minimizes the diver's profile and keeps fins from striking the floor or ceiling, reducing silt disturbance through restrictions.
Question 6: What does it mean when a cave diver signals by tapping their light on a surface three times?
- I am okay, continue the dive
- I am low on gas and we must turn around
- Emergency, something is seriously wrong (Correct answer)
- Wait here while I check ahead
Correct answer: Emergency, something is seriously wrong
Three taps on any surface with a light or hand is a universal emergency signal in cave and wreck diving meaning immediate attention is required.
Question 7: What is the minimum recommended team size for a full cave penetration dive beyond the cavern zone?
- Solo diving is acceptable with proper training
- Two divers (Correct answer)
- Three divers
- Four divers with a surface standby team
Correct answer: Two divers
A minimum buddy team of two is required for cave penetration; a third diver adds redundancy but two is the accepted standard minimum.
PADI Wreck & Cave Diving Fundamentals 5
What is the purpose of a 'safety reel' (also called a 'gap reel') carried by cave divers?