[defconw]

Guys on Twitter said it a Navy term. Shut white lights off, and bring red lights up on a ship for charts. Also a sub marine, rig for red, so the guy can see out of the periscope. FWIW

[HoneysuckleTN]

Qmap has updated!

[little jeremiah]

Okay, I think I sort of grok it. So what circumstances would require rig for red?

[LonePalm]

See my post 811.

Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)