Which of the following statements is true about the "lockout control" on a Synchro-Self-Shifting (SSS) clutch?

Correct Answer: Option A — Permits operation of the GTE without the rotation of the main reduction gear.

The lockout control allows the gas turbine to be operated for testing or warm-up without engaging the main reduction gear. By preventing the SSS clutch from shifting, the engine can reach operational speeds while the propulsion shaft remains stationary, facilitating safe maintenance and system verification without moving the vessel.