What modification is used for the MIL-G-635 goggles for integration with helmets and oxygen masks?

The KMU-219/P modification is specifically designed for the integration of MIL-G-635 goggles with helmets and oxygen masks. This particular modification allows for improved compatibility and ensures that the goggles can be used effectively in conjunction with other critical flight equipment. The KMU-219/P enhances functionality by ensuring that the fit and positioning of the goggles do not interfere with the proper operation and seal of the helmet and oxygen mask.

This integration is essential in aviation environments, where maintaining situational awareness and ensuring safety through the use of oxygen masks are crucial. By utilizing the KMU-219/P modification, aircrew can achieve a cohesive setup that maximizes the effectiveness of their flight gear while minimizing operational hindrances. Other modifications may serve different purposes or be tailored for other types of goggles or equipment, but the KMU-219/P is specifically aligned to the needs of the MIL-G-635 goggles in conjunction with helmets and masks.