UOGML Dive Manual - University of Guam Marine Laboratory

4.2.2 Breathing Masks
Breathing masks must have a readily and positively closing, non-return valve at the
attachment point between the mask and hose, an exhaust valve, and a minimum ventilation
rate capable of sustaining the diver at the depth to which he/she is diving.
4.2.3 Scuba Cylinders
1. Scuba cylinders shall be designed, constructed, and maintained in accordance
with the applicable provisions of the Unfired Pressure Vessel Safety Orders.
2. Scuba cylinders must be hydrostatically tested in accordance to DOT standards.
3. Scuba cylinders must have an internal inspection and be functionally tested in
intervals not exceeding 12 months.
4.2.4 Backpacks Without Integrated Flotation Devices and Weight Systems
Backpacks without integrated flotation devices and weight systems shall have a quick
release device designed to permit jettisoning with a single motion from either hand.
4.2.5 Gauges
Gauges shall be inspected and tested before use and at least every twelve months thereafter.
4.2.6 Flotation Devices
1. A buoyancy control device (BCD) is required for ascent control and emergency
flotation.
2. Personal flotation systems, dry suits, and other variable volume buoyancy
compensation devices shall be equipped with an exhaust valve.
3. These devices shall be functionally inspected and tested at least every twelve
months.
4.2.7 Timing Devices and Depth\ Pressure Gauges
Both members of a diving pair must have a dive watch or other timing device, an approved
a depth gauge, and a submersible pressure gauge.
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