Source: Marty Graham, Wired.com, November 29, 2017
World War I-era camouflage technique
During World War I, artists protected massive warships by hand-painting them with eye-popping monochrome shapes that fooled enemies aboard German U-boat submarines.
The distracting patterns made it hard for periscope-peering targeters to be sure which part of the ship they were looking at, or where it was heading.
Image Source: COURTESY OF NIK HAFERMAAS FOR UEBERALL INTERNATIONAL