Measure 1: Dark Gray System
Some of you have asked me to cover the different camouflage measures of the USN during WWII. I'm going to start at the beginning and work my way through them. I hope you enjoy them. I will try to offer photos when possible.
"The all around most effective system to be used in normally CLEAR weather for low visibility to both surface and aerial observers during the day and during night under both direct searchlight and natural illumination, combined with a certain amount of course deception to surface observers."
-Ship Camouflage Instructions, Ships 2 (January 1941)
"Vertical Surfaces: Dark Gray (5-D) overall except for Light Gray (5-L) structures above the stack tops.
Light Gray 5-L
Dark Gray 5-D
Horizontal Surfaces: All horizontal surfaces except wood decks shall be painted Dark Gray 5-D. The systems differ only in the painting of the vertical surfaces. In case of doubt, as on sloping surfaces, use Dark Gray 5-D.
Notes: The camouflage painting need not be exact or carried into corners. Small gear, wires, rigging, and areas permanently in shadow, as under boats, etc., need not be painted with the camouflage colors. There is no objection to exact or careful painting which may be desired for the sake of good appearance at close range.
All bright or shiny objects, no matter how insignificant, shall be painted, covered, or removed.
Glass windows shall be covered or removed, especially during the day in sunny weather, and at night when anticipating searchlight discovery. Insofar as conditions permit, similar precautions shall be taken on airport lenses.
Wood Decks: Wood decks, except on submarines, shall not be darkened pending further instructions. The best paint or stain for this purpose is being investigated."
source
