Certain types of diving, some of which are listed below, require equipment or procedures which require training. Supplementary guidelines for these technologies are in development by the UA divers using them, must have guidelines established by their Diving Control Board. Divers shall comply with all scuba diving procedures in this manual unless specified.

9.10 STAGED DECOMPRESSION DIVING

No diver shall plan or conduct staged decompression dives without prior approval of the Diving Control Board.

9.20 SATURATION DIVING

If using open circuit compressed air scuba in saturation diving operations, divers shall comply with the saturation diving guidelines of the organizational member.

9.30 HOOKAH

9.31 Divers using the hookah mode shall be equipped with a diver-carried independent reserve breathing gas supply.

9.32 Each hookah diver shall be hose-tended by a separate dive team member while in the water.

9.33 The hookah breathing gas supply shall be sufficient to support all hookah divers in the water for the duration of the planned dive, including decompression.

9.40 SURFACE SUPPLIED DIVING

Surface supplied divers shall comply with all scuba diving procedures in this manual (except Sec. 2.31). Surface supplied diving shall not be conducted at depths greater than 190 fsw (58 msw).

9.41 Divers using the surface supplied mode shall be equipped with a diver-carried independent reserve breathing gas supply.

9.42 Each surface supplied diver shall be hose tended by a separate dive team member while in the water.

9.43 Divers using the surface supplied mode shall maintain voice communication with the surface tender.

9.44 The surface supplied breathing gas supply shall be sufficient to support all surface supplied divers in the water for the duration of the planned dive, including decompression.

9.45 During surface supplied diving operations when only one diver is in the water, there must be a standby diver in attendance at the dive location.

9.50 CLOSED AND SEMI-CLOSED CIRCUIT SCUBA (REBREATHERS)

Closed and semi-closed circuit scuba (rebreathers) shall meet the following requirements:

9.51 Oxygen partial pressure in the breathing gas shall not exceed values approved by the organizational member's DCB. The generally accepted maximum value is 1.5 atmospheres ppO2 at depths greater than 25 fsw (7.6 msw).

9.52 Chemicals used for the absorption of carbon dioxide shall be kept in a cool, dry location in a sealed container until required for use.

9.53 The designated person-in-charge shall determine that the carbon dioxide absorption canister is used in accordance with the manufacturer's instructions.

9.54 Closed and semi-closed diving equipment will not be used at a depth greater than that recommended by the manufacturer of the equipment.

9.60 MIXED GAS DIVING

9.70 BLUE WATER DIVING

Blue water diving is defined as diving in open water where the bottom is generally >200 feet deep. It requires special training and the use of multiple-tethered diving techniques. Specific guidelines that should be followed are outlined in "Blue Water Diving Guidelines" (California Sea Grant Publ. No. T-CSGCP-014).

9.80 ICE AND POLAR DIVING

Divers planning to dive under ice or in polar conditions should use the following: "Guidelines for Conduct of Research Diving", National Science Foundation, Division of Polar Programs, 1990.

9.81 When diving under ice, divers must arrange for at least one safety hole or other alternate surface access. In cases where the divers are tethered, or loss or occlusion of the dive hole is extremely unlikely, and addition of a secondary access would be inordinately difficult, such a secondary hole is not required.

9.82 Untethered diving under ice is permitted in clear water, provided a down line is deployed and divers adhere to the buddy system.

9.83 Any diving under ice where there is a low visibility, shallow water which restricts the diver’s ability to see the entry hole, or a danger of currents, necessitates the use of a tended tether. A tended tether must also be used when, in the diver’s judgement, there is danger of losing surface access during the proposed dive.

9.84 When diving under ice, divers must carry with them two independent regulators – a primary and a back up. These regulators may be attached to the same air source, or to separate sources.

9.85 All dives must be tended. During periods of darkness, at least two lights powered by independent sources must be in the hole.

9.90 OVERHEAD ENVIRONMENTS

Where an enclosed or confined space is not large enough for two divers, a diver shall be stationed at the underwater point of entry and an orientation line shall be used.