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UWS-109AA-Emergency Procedures
| UWS Systems and Equipment 109AA |
21
Sports
Undergraduate 1
11/20/2013

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Term
Surface supply umbilical may become fouled in:
Definition
-mooring lines
-wreckage
-underwater structures
-shifting of heavy objects underwater.
Term
Fouling may result in:
Definition
-fatigue
-exposure
-prolonged submergence
Term
Divers who are fouled should:
Definition
-Remain calm and control breathing
-Think clearly
-Describe the situation to topside
-Determine the cause of fouling and, if possible, clear themselves
-Be careful to avoid cutting portions of the umbilical assembly when using a knife
Term
If efforts to clear themselves are unsuccessful, divers should call for
Definition
The Standby Diver
Term
Blow up is defined as:
Definition
the uncontrolled ascent of a diver from depth
Term
Blow up hazards:
Definition
-Arterial gas embolism
-Decompression sickness
-Missed decompression stops
-Physical injury ( if diver strikes an object on ascent)
Term
In the unlikely event that gas supply to the panel is lost the operator will:
Definition
switch immediately to the secondary gas supply, notify supervisor and standby for instructions
Term
Never continue a dive with only one:
Definition
Gas Source
Term
If hard wire comms are lost, the tender shall:
Definition
establish contact using line signals and abort the dive. If tender does not receive immediate pull reply from the diver, greater stain will be given.
Term
Loss of Descent Line: A diver shall
Definition
-inform topside and attempt to relocate
-Diver will look up odd bottom to see visual
-If deeper than 40ft, the tender should guide the diver.
Term
if a fall should occur, the tender should:
Definition
take strain on the umbilical to stop the divers descent
Term
When the divers bottom time has expired or the task completed The following procedures should be used:
Definition
-Tender will exert slight strain on the umbilical
-Tender will exert a slow steady pull on the umbilical
-Diving supervisor will start timing of the ascent as soon as the diver leaves bottom
-Diving supervisor is responsible for the correct ascent rate
-Panel operator will relay to supervisor the depth – usually every ten feet
-Diver will vent drysuit as needed while ascending to avoid accidental blowup
-When diver arrives to surface, tender and topside personnel will help the diver to the bench and to remove his gear
Term
Kirby Morgan Emergency Procedures: Loss of Comms:
Definition
Revert to line signals and abort the dive when directed by topside
Term
Kirby Morgan Emergency Procedures: Loss of Umbilical Gas Supply:
Definition
-Diver switches to bailout and notifies topside.
-Divers checks that umbilical is clear and surfaces slowly.
-If surface supply is restored, diver will close bailout and notify topside.
Term
Kirby Morgan Emergency Procedures: Damaged Gas Supply Umbilical:
Definition
-Divers opens bailout
-Notify Topside
-Check that umbilical is clear and abort dive.
Term
Kirby Morgan Emergency Procedures: Demand Regulator Fails:
Definition
-Crack open free flow, if no air go to bailout, notify topside
-Backout regulator adjustment knob, if demand resumes, close free flow and bailout, notify topside.
Term
If the diver has to stay on bailout while using free flow, the diver should:
Definition
Open the steady valve during inhalation only.
Term
Kirby Morgan Emergency Procedures: Severe demand regulator free flow:
Definition
-Adjust reg adjustment knob until free flow stops
-If free flow continues, adjust the reg in fully, adjust free flow accordingly.
-Notify topside, clear umbilical, about dive.
Term
Kirby Morgan Emergency Procedures: Major Water Leaking Into the Helmet:
Definition
-maintain the helmet in a face forward slight down position and use the steady free flow
-The SL-27 has the dewatering valve on the lower left side of the helmet
-Notify topside, clear the umbilical and abort the dive
Term
All surface supply systems must be capable of supplying:
Definition
two different sources of breathing gas to the diver
Term
Cases where the hazard of the dive is such that the umbilical might become entangled or pinched, a spare __________ and the proper ________ must be available for emergency replacement by the stand by diver
Definition
a spare umbilical and the proper wrenches
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