46 C.F.R. § 112.01-20
A final emergency power source is one that automatically supplies power to the emergency loads under § 112.15-5 and automatically transfers the temporary emergency loads under § 112.15-1 when the potential of the final emergency source reaches 85 to 95% of normal value.
[USCG-2020-0075, 88 FR 16368, Mar. 16, 2023]