US NAVY DIVE MANUAL CHAPTER 7 SCUBA DIVING OPERATIONS
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REQUIRED EQUIPMENT FOR SCUBA OPERATIONS
- Face mask
- Life preserver/buoyancy compensator.
- Weight belt and weights as required.**
- Swim fins
- Submersible pressure gauge or Reserve J-valve
- Submersible wrist watch. Only one is required when diving in pairs with a buddy line.**
- Depth gauge. **
- Octopus. ***
The basic open-circuit SCUBA components are:
- Demand regulator assembly
- One or more air cylinders
- Cylinder valve and manifold assembly
- Backpack or harness
Each cylinder used in Navy operations must have identification symbols stamped into the shoulder
- 1. DOT material specification, DOTSP6498 or DOT3AL service working pressure
- 2. Serial number assigned by manufacturer
- 3. Inspector’s stamp
- 4. Month and year of initial qualification test
Must be visually inspected at least annually and must be hydrostatically tested at least every five years
The most useful knife has
one sharp edge and one saw-toothed edge
- MK 99 MOD 3 - These are day-or-night flares
- The MK 131 is for day time distress signaling while the MK 132 is for night.
- The only difference between the MK 99 and the MK 131/132other than the fact that the MK 99 is a combined day/night signal flare which gives off yellow smoke and light, is that the MK 99 satisfies magnetic effect limits of for explosive ordinance disposal (EOD) usage
There are three basic types of lifelines:
the tending line, the float line, and the buddy line
A buddy line is ______ feet long
6 to 10
A diving unit can charge its own cylinders by one of two accepted methods
(1) by cascading or transferring air from banks of large cylinders into the SCUBA tanks; or (2) by using a high-pressure air compressor
- Step-In Method: Front and rear
- Roll Method: Front, side and rear
- Beach entry
When using externally powered tools with SCUBA, the diver must have
voice communications with the Diving Supervisor.
SCUBA diving is permitted under floating hulls; however
a tending line to the SCUBA diver must be provided.
Open-circuit SCUBA dives requiring decompression may be made only when considered absolutely necessary and authorized by the
Commanding Officer or Officer in Charge (OIC).
Guidance for SCUBA decompression diving.
- The Diving Supervisor shall determine the required bottom time for each dive and air needed
- If the air supply is not sufficient, a backup SCUBA will have to be made available to the divers. The backup unit can be strapped to a stage or tied off on a descent line which also has been marked to indicate the various decompression stops to be used.
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