KMACS 5 MANUAL
2.5.3 TESTING THE PNEUMO
The pneumo supply may be tested in either the high pressure supply mode or the low pressure supply mode. To test the pneumo, select either mode and pinch the open end (diver’s end) of the red diver pneumo hose. With the hose crimped tightly shut, slowly open the red pneumo valve (D) momentarily, 1/4 turn, and observe the needle’s response on the red diver depth gauge (C).
Fig. 9 Carefully test the pneumo prior to every dive.
CAUTION: Do not “peg” the needle on the pneumofathometer with a maximum reading. A test of pressure equal to 50 feet (15 meters) on the gauge is satisfactory to ensure correct operation.
Close the valve after observing correct operation and release the end of the pneumo hose. The gauge needle should return to zero. Repeat the above pro- cedure for the white diver.
2.6 PREPARING THE DIVER
The diver should be dressed in with the appropriate exposure suit for the local water temperature. The diver should be equipped with a harness to provide an attachment point for his umbilical. By attach- ing the umbilical to the harness, the possibility of a direct pull on the diver’s helmet or mask will be eliminated.
A bailout bottle should be mounted on the diver’s harness. Always dive with a bailout bottle, no matter how shallow the dive. The danger of entanglement is always present and a bailout bottle will give the diver that few extra minutes to free himself in the event he becomes hung up on fishing line, wire, or other submerged objects.
The bailout regulator should be equipped with a quick disconnect whip to make it easier to dress the diver in and out. In addition, the bailout regulator should also be equipped with an over pressure relief valve (Part
With the hose attached to the harness, tuck the pneumo hose under the harness at the diver’s chest. This serves two purposes: 1) it provides instant access in the event the pneumo is to be used as an alternative air supply; 2) gas absorption and elimina- tion of nitrogen is considered to occur at the diver’s chest level.
When diving under a potential decompression situa- tion, a depth gauge or dive computer should be worn by the diver as a backup system. If decompression is anticipated there must be enough air on hand for the diver to complete the dive and the decompres- sion obligation.
2.7THE DIVE SUPERVISOR AND THE KMACS 5 OPERATOR
During the diving operation, one person should always be in charge to avoid confusion. Generally, this should be the most senior diver, by virtue of his diving experience.
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