Referring to the illustration pertaining to an alternator protection and alarm system, what statement is true concerning the component labeled "LO"? EL-0067

Correct Answer: Option A — LO is an alternator electrical fault trip master lock-out and alarm device.

In marine generator protection schematics governed by Title 46 CFR and IEEE 45, the designation LO signifies a master lockout device. It coordinates electrical fault trips, preventing automatic breaker reclosure until faults are manually cleared and reset.