>MOS - Media Object Server
c) RED – Indicates an emergency condition within the submarine and that it will surface immediately, if possible. Surface ships clear the area and stand by to give assistance after the submarine has surfaced. In case of repeated red signals, or if the submarine fails to surface within a reasonable time, she may be assumed to be disabled. Buoy the location, look for a submarine buoy and attempt to establish sonar communications. Advise U.S. Naval authorities immediately.
It's like falling asleep at church