# Commercial diving/Respond to emergencies

Relevance: Scuba diving (partial - OC SCUBA), Surface supplied diving (partial - OC SSDE), Surface oriented wet bell diving (full).
Required outcomes:
* Demonstrate the diver’s standard first response to breathing apparatus malfunctions including free flow and restricted flow of main breathing gas supply
* Demonstrate the diver’s standard first response to flooding of the helmet or full-face mask
* Demonstrate the diver’s standard first response to a snagged or fouled umbilical
* Demonstrate the diver’s standard first response to severed or pinched umbilical
* Demonstrate the recommended procedure to be taken by diver and surface crew for loss of gas/air supply or contaminated breathing gas
* Demonstrate the recommended procedure to be taken by the diver and surface crew for loss of voice communications, including the use of line signals
* Demonstrate correct procedure for deployment as standby diver to assist a working diver, including trapped or fouled diver or diver’s umbilical
* Simulate the recovery and management of a conscious incapacitated diver with minor or serious injury
* Simulate the recovery and management of a breathing, unconscious incapacitated diver, including potential contaminated breathing gas, near drowning, convulsions
* Simulate the recovery and management of a non-breathing unconscious incapacitated diver, including a dry or flooded breathing apparatus
* Simulate the recovery and management of a diver who has had a rapid ascent including blow-up and emergency ascent
* Simulate the recovery and management of a diver who has potential decompression illness including rapid ascent or omitted decompression
* Simulate the recovery and management of a diver during DP run off including yellow (amber) and red alert
* Demonstrate the management of a diver of a diver in the event of adverse fluctuations in the temperature of the suit water
* Demonstrate the procedures to recover a distressed diver to the diving stage or wet bell
* Follow emergency plans

## Respond to emergency as standby diver
### Deploy as standby diver

    Remain ready for immeadiate deployment while the working diver is in the water
    On instruction from the supervisor, lock into hat, report to supervisor ready to enter water
    On instruction from supervisor, enter water and complete in-water checks. Report status to supervisor.
    On instruction from supervisor, follow diver's umbilical and descend to distressed diver
    Provide running commentary of progress during dive.

### Trapped or fouled diver or umbilical

    (diver still communicating)
    Free diver's umbilical from snags if applicable, reasonably practicable, and diver is known to be responsive.
    As far as reasonably practicable, ensure own umbilical does not snag.

### Unresponsive diver

    (diver not communicating)
    On sighting diver, report what can be seen regarding hazards and condition of diver.
    On reaching diver, assess responsiveness of diver, evidence of breathing and general condition of diver as may be visible

## Follow emergency plans

Respond to emergencies by following the emergency plans described in the operations plan or operations manual List the classes of emergency for which an emergency plan should be in place before a diving operation Reasonably foreseeable emergencies that are not covered by standard emergency procedures should be allowed for in diving operation planning. These are generally plans which would vary depending on the circumstances of the operation. Examples include:
* Lost diver: At some sites this is not possible, at others the procedures required for search and recovery may vary considerably depending on the geography of the site and the mode of diving.
* Man overboard: Procedures will largely depend on the vessel or platform, and the personnel responsible for responding, which may not be the dive team.
* Deteriorating environmental conditions: Some sites may be subject to unusual environmental hazards. Risk may be to the diver, or the whole team.
* Job-specific emergencies: Some operations involve hazardous materials or equipment.