46 CFR § 112.50-5
Electric starting
April 15, 2021
An electric starting system must have a starting battery with sufficient capacity for at least six consecutive starts. A second, separate source of starting energy may provide three of the required six starts. If a second source is provided, the electrical starting system need only provide three consecutive starts.
[CGD 94-108, 61 FR 28288, June 4, 1996]