Any ship operating at night rigs for red to limit detection AND save night vision. I once proposed it for certain lights in our house, but the better half preferred me stubbing my toes. ;-]
RE: Red lights-I love my red night lights and several other lamps are also red. Last time I stubbed my toe-I had to have a toenail removed. Ouch. No more for me-rigged for red all over the place with motion sensitive night lights. Ha.
So...Rig for red!
UP periscope?