As shown in the illustrated one-line diagram of a two-tiered emergency power system for a passenger ship, what statement is true? EL-0166

Correct Answer: Option A — On a loss of normal ship's power, the temporary emergency loads power source is battery (from AC/DC UPS "B"), whereas the final emergency loads power source is the emergency generator.

In two-tiered passenger ship emergency power systems governed by 46 CFR Subchapter J, uninterruptible power supply (UPS) units supply immediate, short-term temporary emergency loads, while the automatically starting emergency diesel generator provides power for final long-term emergency loads.