
In WWI, German U-Boats were taking out British ships at an alarming rate. British artist and naval officer Norman Wilkinson conceived the idea to paint the ships with geometric shapes of opposing colors in an attempt to confuse the submarines. Although the tactic's effect was debatable, it was adopted by the United States (where it was called Razzle Dazzle), and both navies used it into WWII.
Wilkinson, from a 1919 lecture on Dazzle:
The primary object of this scheme was not so much to cause the enemy to miss his shot when actually in firing position, but to mislead him, when the ship was first sighted, as to the correct position to take up. [Dazzle was a] method to produce an effect by paint in such a way that all accepted forms of a ship are broken up by masses of strongly contrasted colour, consequently making it a matter of difficulty for a submarine to decide on the exact course of the vessel to be attacked.... The colours mostly in use were black, white, blue and green.... When making a design for a vessel, vertical lines were largely avoided. Sloping lines, curves and stripes are by far the best and give greater distortion.
Winston Churchill was said to consider deception in war an invaluable "element of léger de main, an original and sinister touch, which leaves the enemy puzzled as well as beaten." Seem more ships here, here, and here.
Sources: RISD, Wikipedia, Twisted Sifter, via Publikhair
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