TM 5-4220-226-14&P
Table 2-4. Equipment Checks Prior to Water Entry
Step
Procedure
6. Check entire rig - continued.
e. Ensure emergency air supply cylinder valve is fully opened, then
back off one-quarter turn.
NOTE
All equipment should be functioning correctly and
the diver breathing comfortably for at least two
minutes from ON AIR time before entering water.
TENDER - Notify diving supervisor that diver is "READY TO ENTER
WATER."
7. Diver enter water.
TENDER - Assist diver into water.
2-9. In-Water Checkout Procedures.
The procedures in table 2-5 are to be performed In the water before the diver begins his descent to the working
depth.
Table 2-5. In-Water Checkout Procedures
Step
Procedure
1. Breathing check.
Perform the following system checks as necessary.
a. Ensure adequate air flow.
b. Open and close steady flow valve to ensure proper operation.
c. Open and close dial-a-breath valve to ensure proper operation.
d. Check breathing resistance by breathing in and out. Adjust dial-a-
breath valve so that only slight effort is required to inhale.
e. Press purge button to check air purge.
2. Communications check.
Diving Supervisor - Perform communications check:
a. Diver to diver, send and receive.
b. Divers to standby diver, send and receive.
c. Divers to surface support personnel, send and receive.
d. Divers to communications operator (if applicable), send and
receive.
e. Communications operator to surface support personnel (if
applicable), send and receive.
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