Final answer:
An air bill, containing all information about a shipment, is usually found in the cockpit where the flight crew can reference it during the flight.
Step-by-step explanation:
An air bill is a shipping document airlines use to accompany freight as it moves from one destination to another. This document contains all the information about the shipment and ensures that it is handled correctly and arrives at the proper destination.
The correct answer to where an air bill is usually found is:
The cockpit is where the pilots and essential flight crew manage the operations of the aircraft. They have access to the air bill as it contains necessary details regarding the flight's cargo for reference during the flight. While the physical copy of the air bill might also be found with the cargo or at the cargo area door for loading personnel, pilots need this information accessible to them in the cockpit for proper documentation and communication with air traffic control and ground crews.