Final answer:
The Jumpseat Eligibility Indicator (JSI) is what identifies an employee as eligible to sit in a jumpseat on an aircraft, confirming they have completed the necessary safety trainings and obtained authorization.
Step-by-step explanation:
An indicator that identifies an employee as eligible to sit in a jumpseat on an aircraft is typically referred to as a Jumpseat Eligibility Indicator (JSI). Airlines use this indicator to determine whether an employee has the necessary permissions and qualifications to occupy a jumpseat, which are auxiliary seats often located in the cockpit or cabin crew areas.
The JSI is a specific code or status assigned to the employee, usually after completing certain safety training and receiving authorization from the airline. It's important for airline operations and safety to strictly control jumpseat occupancy.