Which model of Protective Breathing Equipment is used on the aircraft?

• A. Dorsel model
• B. Horizon model
• C. Nova model
• D. ESSEX model

Answer: (D)

Protective breathing equipment on the aircraft is designed to deliver breathable air and protect your eyes and airway during smoke or fumes, so the question is asking which specific model is standardly installed. The Essex model is the one most commonly found on commercial aircraft and is the standard you’re trained to recognize and deploy. It includes a hooded facepiece and a chemical oxygen generator that starts when you don the hood, providing about 15 minutes of breathable air. This setup is favored because it’s reliable, easy to deploy quickly, and works with the cabin crew’s routine safety procedures, making it the familiar, standard choice across many fleets. The other names—Dorsel, Horizon, and Nova—are not the typical aircraft-installed models in most training and operations, so they aren’t the standard you’d expect to encounter in this context.