What is the nomenclature for the life preserver used in flight operations?

The correct nomenclature for the life preserver used in flight operations is LPU-21. This particular model is designed for aircrew members and is equipped with features to enhance safety and survival in the event of a water landing. The LPU-21 provides flotation support, allowing users to remain buoyant and aids in swimming or signaling for help after a ditching scenario. This life preserver is notable for its lightweight materials and compact design, making it suitable for use in aviation environments where space and weight are critical considerations.

The other models mentioned may refer to different versions or types of life preservers, which may not be specifically designated for flight operations in the same capacity as the LPU-21. Each model in the LPU series has specific features and applications, so it’s essential to select the correct one based on operational requirements.