Who is designated as the in-flight security coordinator?

The in-flight security coordinator is designated as the Pilot in Command (PIC) because the PIC has the overall authority and responsibility for the safety and security of the aircraft and its passengers during the flight. This designation is critical, as the PIC must ensure that protocols are followed in case of any security threats, including coordinating with flight attendants and crew to maintain a secure environment. The PIC's comprehensive training and experience in handling emergency situations make them the most suitable individual to assume this role and make quick, informed decisions regarding security issues.

Other individuals, such as flight attendants or co-pilots, play important roles in maintaining safety, but ultimately, the authority and responsibility for in-flight security are vested in the PIC. The head of security may be involved in broader security policies and protocols, but their role is not operationally focused on in-flight situations, hence does not designate them as the in-flight security coordinator.