What does PSU refer to in an aircraft?

The term PSU refers to the Passenger Service Unit, which is an essential component found in the cabin of an aircraft. The Passenger Service Unit typically includes various amenities and controls that enhance the in-flight experience for passengers. These can include individual reading lights, air vents, and sometimes even call buttons for flight attendants.

Understanding the function of the Passenger Service Unit is crucial for flight attendants, as they need to be familiar with its features in order to assist passengers effectively. For instance, knowing how to adjust the reading lights or directing passengers on how to use their air vents can significantly improve customer service during the flight.

The other options offered, such as Power Supply Unit and Public Safety Unit, while they may relate to aviation in different contexts, do not accurately define the PSU in relation to passenger service. Knowing the correct terminology helps ensure that communication is clear and effective in the operational context of an aircraft.