Which of the following best describes the term "Ready Reserve"?

The term "Ready Reserve" refers specifically to flight attendants who are not scheduled to work on a particular flight but must be available to respond quickly to cover for scheduled crew members who may be unable to fulfill their duties. This means they are essentially on standby at the base airport, ready to be called in at short notice if needed.

Being on standby ensures that there are enough crew members to maintain safety and flight schedules, as it allows the airline to manage unforeseen circumstances like last-minute absences. Therefore, the correct choice effectively captures the essence of being in a prepared but non-active role at the airport, highlighting the duty to be available for immediate service when required.

In contrast, the other options describe different roles or statuses that do not align with the definition of "Ready Reserve." For instance, active duty on flights indicates a role that involves flying, whereas on-call for training suggests a focus on skill development rather than flight operations. Home base operations may imply general activities or responsibilities at the crew's primary location, but it does not denote the specific function of being on standby.