How many Quick don O2 masks are located in the flight deck?

In the context of airline safety equipment, particularly in a flight deck environment, the number of Quick don O2 (oxygen) masks is crucial for ensuring the safety of the flight crew in case of a decompression event. The flight deck is typically equipped with a specific number of these masks to enable both pilots to access oxygen quickly and efficiently.

The correct answer indicates that there are four Quick don O2 masks located in the flight deck. This number is designed to provide redundancy and ensure that both pilots have immediate access to supplemental oxygen if needed. Having four masks allows for scenarios where more crew members may be present (such as in certain operational setups or during training) and ensures that additional crews are accounted for in emergency situations.

In aviation safety protocols, maintaining a specific quantity of emergency equipment is based on regulatory standards and manufacturer specifications to enhance the overall safety of flight operations. Understanding the exact number of O2 masks helps reinforce the importance of preparedness in emergency situations, ensuring that each crew member is equipped to respond appropriately when needed.