Which statement is true regarding the illumination of the Cabin Alt High CAS message?

The illumination of the Cabin Alt High CAS (Crew Alerting System) message is an important safety feature that alerts the crew to changing cabin pressure conditions. When the cabin altitude reaches a threshold that can be considered hazardous for occupants lacking supplemental oxygen or proper acclimatization, this alert activates. In most aviation systems, this threshold is established at 14,000 feet.

When the cabin reaches or exceeds this elevation, the system triggers the Cabin Alt High message to ensure that crew members are aware and can take appropriate action, such as beginning oxygen protocols for crew and passengers to prevent hypoxia. This established altitude corresponds with regulations and safety guidelines put in place for aircraft operations.

The other altitude options listed, such as 10,000 feet, 12,000 feet, and 16,000 feet, may correspond to different alerts or conditions, but they do not reflect the specific altitude at which the Cabin Alt High alert is activated. The emphasis on 14,000 feet is tied to crew and passenger health safety operational protocols.