Final answer:
The escort for remains returned to the Dover Port Mortuary is usually a member of the honor guard from the deceased's service branch, not the aircraft crew.
Step-by-step explanation:
The question pertains to who acts as the escort when remains are returned from a contingency operation to the Dover Port Mortuary. According to the standard protocol of the United States Military, the official policy designates a member of the honor guard detail, often a representative from the deceased's respective service branch, to serve as the escort for the remains.
This individual is tasked with accompanying the fallen service member through every step of the return journey until the remains are transferred to the next of kin or arrive at the final resting place. It is not typically the role of the flight crew, such as the aircraft commander, flight engineer, navigator, or the co-pilot to serve as escorts. The honor guard escort performs a solemn duty, reflecting the nation's gratitude and respect for the service member's sacrifice.