How many oxygen masks are typically available in each row of seats in the PSU?

In the Passenger Service Unit (PSU), which is located above the seats in an aircraft cabin, there are typically four oxygen masks available for use in each row of seats. This configuration ensures that in the event of a loss of cabin pressure, all passengers in that row have access to an oxygen mask, accommodating a maximum capacity that includes seated passengers and their potential accompanying individuals.

Having four masks per row not only addresses the need for sufficient oxygen supply during emergencies but also complies with safety regulations that mandate the ability to provide an adequate number of masks for each passenger seat. This arrangement emphasizes the airline's commitment to passenger safety and preparedness for potential in-flight emergencies.