The Navy has a process to halt all this activity, called going "River City" (slang) - which basically is a standing order by the commanding officer to halt all

The Navy has a process to halt all this activity, called going "River City" (slang) - which basically is a standing order by the commanding officer to halt all outgoing communications from a ship unless specifically authorized by the CO. Aircraft carriers now have Wifi available for sailors for morale reasons, so cell phones are used all the time while underway for text and email. However, if an incident happens (such as a crash) or, you know, going to war or etc - the ship will undergo "River City" conditions and I guarantee you everyone on board knows the drill and you'll be in deep shit if you violate River City. River City conditions will also be implemented in the case of a fatality, accident or death onboard the ship so the identity of the victims is preserved so the Navy can make next of kin notifications without family being alerted early to the issue.