Ghost Fleet

The "Ghost Fleet" is a mentioned only entity, believed to be related to a Chinese stealth submarine program.

Background
In December 2075, the Defense Intelligence Agency's experimental Predictive Analytic Machine concluded that Chinese stealth technology far surpassed that of the United States, and that there was a 91% chance they were engaged in large scale research.

The A-31 and B-19 stations had reported a "Ghost Fleet" in November, and P.A.M. stated that this may indicate research had commenced with submersible vessels. When asked to guess if this was accurate, the robot aborted the machine/human interface, and the inquiring general stated they wouldn't go to the Joint Chiefs unless substantive proof was provided.

Appearances
The Ghost Fleet is mentioned in Fallout 4.