As first engineer, you are standing by the #3 deep fuel oil storage tank as a crew member is working inside the tank. Before entering the tank, the atmosphere was checked and determined safe for men to work. While standing by you notice that the crew member is not moving. After attempts to communicate with the downed mariner receives no response, what action would you take?

Correct Answer: Option C — Have additional crew members don a SCBA to enter the tank, to aid in the removal of the unconscious crew member.

Confined space entry procedures under 46 CFR require that any rescue attempt must prioritize the safety of the rescuers. Entering an oxygen-deficient or toxic atmosphere without Self-Contained Breathing Apparatus (SCBA) is strictly prohibited. Rescuers must be equipped with proper breathing apparatus to prevent becoming additional casualties in the tank.