On finding a casualty:

• Ensure your own safety; do not become the next casualty.
• If necessary, remove the casualty from danger or remove the danger from the casualty (but see the observation below regarding a casualty in an enclosed space). If there is only one unconscious or bleeding casualty (regardless of the total number of casualties), give immediate treatment to that casualty only, and then send for help.

If there is more than one unconscious or bleeding casualty:

• Send for help.
• Then begin giving appropriate treatment to the most seriously affected casualty in the following order of priority: severe bleeding; stopped breathing/heart; unconsciousness.

If the casualty is in an enclosed space, do not enter the space unless you are a trained member of a rescue team acting under instructions. Send for help and inform the master.
It must be assumed that the atmosphere in the space is hostile. The rescue team MUST NOT enter unless wearing breathing apparatus, which must also be fitted to the casualty as soon as possible. The casualty must be removed quickly to the nearest safe adjacent area outside the enclosed space unless the injuries and the likely time of evacuation make some treatment essential before moving.