What is a characteristic of slow decompression?

A characteristic of slow decompression is indicated by a hissing door seal. This sound often results from a gradual loss of cabin pressure, where the pressure differential allows air to escape slowly through the door seals or other openings. In such cases, the decrease in cabin pressure is not abrupt, and the hissing sound is a clear indicator that the cabin is not maintaining its intended pressure level.

In contrast, characteristics associated with quick decompression would include a sudden loss of cabin pressure, rapid cabin pressure equalization, and the need for immediate use of oxygen masks. These features are indicative of a rapid depressurization situation, while the hissing sound serves as a telltale sign of a more gradual decompression scenario. Understanding the distinction between these two types of decompression is crucial for effective response and management in aviation safety.