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I see that 3D&3N is wisely waiting for confirmation before declaring it true Q comms. In the event that it is Q, then here's a definition of "Rig for Red" as it pertains to submarines.
"Rig for Red" is normally a command used in the Control Room. It is normally used when the boat is going to be surfacing or coming to Periscope Depth at night. The purpose is to give the lookouts and the officer designated to head to the bridge upon surfacing a chance for their eyes to adjust to darkness, or the OOD the same thing before looking through the Periscope. However, with the change to Blue, often times Red glasses are also used to provide the same effect and then Control is changed when the command is given to surface or come to PD.
During Battle Stations and at night, many spaces are rigged for red in order to simulate night conditions.
https://www.answers.com/Q/What_does_it_mean_to_Rig_For_Red_and_what_is_is_used_for
Posted it here (459) 4 PM
http://freerepublic.com/focus/chat/3790768/replies?c=459
Also posted the other link on that Q post 2 days ago here: