History · Art · Vision science
The dazzle story
Dazzle wasn't camouflage in the usual sense. You can't hide a steamship belching smoke on an open ocean. The idea was to make the ship lie about itself.
A WWI U-boat commander had to work out a target's course and speed from a brief look through a periscope, then aim his torpedo at where the ship was going to be. Get the "angle on the bow" wrong by a few tens of degrees and the torpedo passes harmlessly astern. Dazzle's clashing stripes, false bows and broken outlines were designed to spoil that one quick judgement.
It was also one of the strangest collaborations in art history. Painters, sculptors and art students worked alongside naval officers, and Vorticists ran the paint gangs in the docks.
Timeline, 1914 → today
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So… did it work?
Honestly, nobody could ever prove it. Here are the numbers people argued over.
Share of sailings in which ships were attacked, dazzled versus plain (Admiralty, 1918). Dazzled ships were attacked more often.
Share of torpedoed ships that sank, dazzled versus plain. That looks like a win for dazzle…
Share of hits that struck amidships, the most damaging spot. Again, it looks good for dazzle…
…but this is the share of ships over 5,000 tons. Dazzled ships were far bigger, which ruins any simple comparison.
Blodgett's 1919 model test reported heading errors of up to about 60°. A 2025 re-analysis put the dazzle "twist" at only about 7°.
Size of the "horizon effect" in that re-analysis. Observers pull a ship's heading toward the horizon whatever paint it wears.
Six styles in this site
Every ship in the Periscope Test is generated from one of these six recipes. They're inspired by historical approaches rather than copies of specific ships. Click a ship to repaint it.
The Dazzle Quiz
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