B-36 Mock down time sleeping

The transcript describes a 39-hour flight where crew members must conserve energy and rest when not on duty. As the plane approaches the target, all crew members are required to be alert, and the bunks in the tail compartment are constantly occupied to ensure readiness.

What is the duration of the flight mentioned in the text?

How do the crew manage their energies during the flight?

What must the crewmen who are not on duty do?

During which hours is it crucial for the crew to be alert?

What is the condition of the bunks and tail compartment during the flight?