CHAPTER 6 — Operational Planning
Change A 6-49
SURFACE-SUPPLIED DIVING OPERATIONS PREDIVE CHECKLIST
(Sheet 2 of 3)
__ 4. Compressors:
___ a.
Determine that sufficient fuel, coolant, lubricants, and antifreeze are available to service
all components throughout the operation. All compressors should be fully fueled,
lubricated, and serviced (with all spillage cleaned up completely).
___ b.
Verify that all diving system operating procedures have been conducted properly to align
the dive system.
___ c.
Check maintenance and repair logs to ensure the suitability of the compressor (both
primary and back-up) to support the operation.
___ d.
Verify that all compressor controls are properly marked and any remote valving is tagged
with “Divers Air Supply - Do Not Touch
” signs.
___ e.
Ensure that compressor is secure in diving craft and shall not be subject to operating
angles, caused by roll or pitch, that will exceed 15 degrees from the horizontal.
___ f.
Verify that oil in the compressor is an approved type. Check that the compressor oil does
not overflow Fill mark; contamination of air supply could result from fumes or oil mist.
___ g.
Check that compressor exhaust is vented away from work areas and, specifically, does
not foul the compressor intake.
___ h.
Check that compressor intake is obtaining a free and pure suction without contamination.
Use pipe to lead intake to a clear suction if necessary.
___ i.
Check all filters, cleaners and oil separators for cleanliness IAW PMS.
___ j.
Bleed off all condensed moisture from filters and from the bottom of volume tanks. Check
all manifold drain plugs, and that all petcocks are closed.
___ k.
Check that all belt-guards are properly in place on drive units.
___ l.
Check all pressure-release valves, check valves and automatic unloaders.
___ m.
Verify that all supply hoses running to and from compressor have proper leads, do not
pass near high-heat areas such as steam lines, are free of kinks and bends, and are not
exposed on deck in such a way that they could be rolled over, damaged, or severed by
machinery or other means.
___ n.
Verify that all pressure supply hoses have safety lines and strain reliefs properly attached.
H. Activate the Air Supply in accordance with approved OPs.
__ 1.
Compressors:
___ a.
Ensure that all warm-up procedures are completely followed.
___ b.
Check all petcocks, filler valves, filler caps, overflow points, bleed valves, and drain plugs
for leakage or malfunction of any kind.
___ c.
Verify that there is a properly functioning pressure gauge on the air receiver and that the
compressor is meeting its delivery requirements.
__ 2.
Cylinders:
___ a.
Gauge all cylinders for proper pressure.
___ b.
Verify availability and suitability of reserve cylinders.
___ c.
Check all manifolds and valves for operation.
___ d.
Activate and check delivery.
__ 3.
For all supply systems, double check “Do Not Touch
” tags (tags outs).
Figure 6-21b. Surface-Supplied Diving Operations Predive Checklist (sheet 2 of 3).
