What color is the beacon that signifies rotor engagement during flight operations?

The beacon that signifies rotor engagement during flight operations is colored amber. This color is specifically chosen to provide clear visibility to personnel on the ground or in close proximity to the aircraft. An amber beacon typically indicates caution, alerting ground crew and other nearby individuals to the potential dangers associated with the rotor system in motion.

In aviation operations, particularly with helicopters such as the MH-60S, proper color coding is critical for maintaining safety during flight operations. The use of amber helps to ensure that everyone understands the status of the aircraft and can take necessary precautions while working around it.