What additional requirement is needed for FDP extension due to mission delays?

The requirement for Wing Commander (WG/CC) approval for flight duty period (FDP) extension due to mission delays is rooted in the need to ensure the safety and operational effectiveness of flight crews. Mission delays can impact crew endurance and ability to carry out their duties effectively, and the WG/CC is responsible for overseeing the well-being of personnel under their command. By obtaining this approval, it ensures that the extended duty is justified and that appropriate measures are taken to maintain safety standards.

In situations where crews face delays, it becomes vital to assess the situation thoroughly and consider factors like crew fatigue and operational needs. The WG/CC's involvement helps in making informed decisions that prioritize both mission success and the safety of the flight crew. This additional layer of scrutiny ensures compliance with regulations and establishes accountability for extended duty periods, thus protecting the interests of both the personnel involved and the larger mission objectives.

Other options do not meet the established protocol for extending FDP under delayed circumstances; hence, they don't provide the necessary oversight and evaluation that the situation warrants.