PADI Wreck & Cave Diving Fundamentals 4

Question 1

When selecting a penetration reel for wreck diving, what characteristic is most important?

Accepted Answer

The line must be strong enough to pull against and be non-stretch

Answer

A non-stretch, strong line (typically braided nylon or polyester) allows divers to confidently follow it under tension in zero visibility.

Question 2

Which fin technique is recommended inside a wreck or cave to minimize silt disturbance?

Accepted Answer

Frog kick or modified frog kick

Answer

The frog kick keeps fin tips angled upward and away from the bottom, minimizing silt disturbance in overhead environments.

Question 3

A diver notices a 'cookie' (small plastic marker) attached to the guideline during a cave dive. What does this indicate?

Accepted Answer

The starting point of that team's line laid that day

Answer

A personal marker (cookie) identifies a specific team's tie-in point on a shared guideline, preventing navigation confusion.

Question 4

What environmental hazard is especially common inside older steel shipwrecks and can injure divers who brush against interior surfaces?

Accepted Answer

Sharp corroded metal, broken glass, and deteriorating materials

Answer

Corroded metal, collapsed materials, and broken glass inside aging wrecks create significant laceration and entanglement hazards.

Question 5

In the context of cave diving gas planning, what is the 'rule of halves' used for?

Accepted Answer

Planning dives with only a single tank

Answer

The rule of halves applies when diving solo or when conditions make the rule of thirds insufficient; turn back at half tank.

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