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PADI Standards: Ratios and Depths November 17, 2008

Posted by Chris Sullivan in Training.
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These are infuriating questions on PADI Professional exams. Not because they’re not important, but because I personally find them hard to remember. Here’s a list of the ratios I skimmed from the instructor guides this morning.

Ratios and Depths

  • Open Water Dive One with Discover Scuba Students (or mix of Discover Scuba and Open Water Diver), or when divers have only completed confined water dive 1 (and knowledge development section 1): Maximum 4:1, Maximum 6:1 with a certified assistant.
  • Open Water Dive One and Two may be conducted with max 8:1 (10:1 with 1 certified assistant or 12:1 with 2 certified assistants) after knowledge development 1-3 and confined water dives 1-3.
  • All Knowledge development and confined water dives must be complete prior to open water dives 3 and 4.
  • The maximum depth for open water dives 1 and 2 is 40 feet, while the maximum depth for open water dives 3 and 4 is 60 feet (except when 10 or 11 year old divers are present, then maximum 40).
  • Confined Water Dive with 10 or 11 year-old divers: Maximum 4:1, with maximum of 2 10 or 11 year-old divers. Open Water Dives with 10 or 11 year-old divers: Maximum 4:1, Maximum 2 of 10 or 11 year-old divers, maximum depth 40 feet.
  • Open Water Training: Maximum 8:1. Maximum 10:1 with 1 certified assistant, 12:1 with 2 certified assistants.
  • Underwater Tour by certified assistants for OW dives 2, 3 and 4. Maximum 2:1.
  • During open water dives, certified assistants may: (1) Accompany students at surface or underwater while instructor is training other students on skills, (2) Accompany students on navigation exercises on OW dives 3 and 4, (3) Accompany students on surface swims to and from exit point
  • Skills Evaluation by Assistant Instructors (1) 25 metre tired diver tow, (2) Snorkel/Regulator Exchange (3) buoyancy check, (4) Cramp Removal, (5) Surface Navigation, (6) Scuba Unit Removal and Replacement at Surface, (7) Weight System Removal and Replacement at Surface.
  • Discover Snorkelling ratio is based on judgment of conditions, control and other relevant factors. There is no minimum age.
  • PADI Skin Diver may be conducted by Divemaster and above and has a maximum ratio of 10:1 in Open Water and 16:1 in confined water.
  • PADI Scuba Diver: Maximum Depth 40 feet after certification (PADI Scuba Divers only do Open Water Dives one and two, which also have a maximum of 40 feet).
  • Rescue Diver Open Water Scenarios: Maximum ratio 8:1, plus 4 students per certified assistant.
  • Rescue Diver Confined Water Scenarios: Maximum ratio is 10:1, plus 4 student per certified assistant.
  • Training of divemasters in confined and open water: Maximum ratio of 8:1

If I write this out enough times, maybe I’ll remember it.

It snowed on Saturday night, with about 2 inches of accumulation. The temperature will be around freezing (a little above during day, a little below during night) with snow predicted Wednesday, Thursday and Sunday. My open water dive for the AI course is on Sunday – it should be a treat!

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