46 C.F.R. Subpart 112.45—Visible Indicators
Title 46 - Shipping
There must be visible indicators in the machinery space to show; (a) When an emergency battery is discharging; and (b) When the automatically controlled emergency power source is supplying the emergency loads.
Title 46: Shipping
PART 112—EMERGENCY LIGHTING AND POWER SYSTEMS
Subpart 112.45—Visible Indicators
§ 112.45-1 Visible indicators.