Which of the following is a key feature of the M-20?

The M-20 is notable for its inclusion of a portable oxygen generator, which is essential in environments where breathable air may be unavailable or compromised. This feature allows for the generation of oxygen on-site, providing a critical resource for safety and survival in hazardous conditions. Unlike a self-contained breathing apparatus, which stores a limited supply of oxygen, or a direct communication line, which enhances operational coordination, the portable oxygen generator directly addresses the need for a continuous and reliable air supply. Its capacity to produce oxygen as needed makes it an invaluable tool in emergency situations, ensuring that personnel can sustain their breathing without relying solely on pre-packaged oxygen supplies.