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Deep Diving Techniques & Planning Flashcards

7 cards from real PADI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Deep Diving Techniques & Planning flashcards as text

  1. A diver notices their dive computer showing a flashing NDL warning at 80 feet. What is the correct action?

    Answer: Begin a controlled ascent immediately to a shallower depth

    When NDL is nearly exhausted, ascending to a shallower depth extends the NDL and reduces nitrogen absorption rate.

  2. What is the recommended minimum surface interval between repetitive deep dives?

    Answer: At least 1 hour, or as directed by dive tables/computer

    Surface intervals for repetitive diving should follow dive table or computer guidance, generally at least one hour, to allow adequate nitrogen off-gassing.

  3. Which gas law explains why air consumption increases dramatically during deep dives?

    Answer: Boyle's Law

    Boyle's Law states that gas volume is inversely proportional to pressure, meaning each breath consumes more gas molecules at depth than at the surface.

  4. During a deep dive, a buddy suddenly becomes unresponsive at 90 feet. What is the first priority?

    Answer: Establish positive buoyancy and begin a controlled ascent

    Establishing buoyancy and ascending with the unresponsive diver gets them to the surface where proper rescue breathing and emergency care can begin.

  5. What effect does cold water have on nitrogen narcosis during deep dives?

    Answer: Cold water can worsen narcosis effects by reducing diver comfort and alertness

    Cold water increases physiological stress and reduces alertness, which compounds the cognitive impairment effects of nitrogen narcosis.

  6. A dive plan calls for a maximum depth of 100 feet with a 20-minute bottom time. Which contingency plan is MOST important to include?

    Answer: An emergency ascent procedure if air runs low

    Every deep dive plan must include an emergency ascent procedure specifying when and how to abort the dive if gas supplies drop critically.

  7. What does the term 'reverse dive profile' mean, and why is it generally discouraged for deep dives?

    Answer: Doing the deepest portion last in a series of dives; it can increase DCS risk

    A reverse dive profile, where the deepest dive comes last in a dive series, may increase decompression sickness risk due to residual nitrogen loading.