What is the primary purpose of an SCBA?

The primary purpose of a Self-Contained Breathing Apparatus (SCBA) is to provide breathing air in hazardous atmospheres. An SCBA is designed to supply clean, breathable air to the user, allowing them to safely navigate environments that may be toxic, oxygen-deficient, or otherwise hazardous, such as during firefighting or industrial emergencies.

While improving visibility in smoke, communicating with rescue teams, and providing warmth in cold environments may contribute to the overall safety and effectiveness of operations, they are secondary functions. The fundamental role of an SCBA centers around ensuring that the wearer has access to a reliable air supply, enabling them to perform tasks safely in dangerous situations. This is why option B is the most accurate representation of the SCBA's primary purpose.