What is the name of the casualty communication sound powered circuit?

The casualty communication sound powered circuit is specifically designated as X40J. This circuit is essential for ensuring effective communication during emergency situations aboard a vessel, particularly when power sources may be compromised. The X40J circuit allows personnel to relay important information regarding casualties and damage control efforts without relying on electrical systems, making it a vital part of onboard safety and response plans.

Understanding the function and designation of sound-powered circuits can help personnel quickly identify and utilize the appropriate channels for communication in critical situations, which is crucial for effective damage control and the safety of all onboard.