WWI Dazzle Camouflage: It Wasn't the Paint, It Was the Horizon Effect

During WWI, navies used "dazzle" camouflage to confuse German U-boats. Researchers at Aston University re-analyzed a 106-year-old study and found that the "dazzle" effect was far less significant than the "horizon effect." The horizon effect causes viewers to underestimate a ship's angle relative to the horizon; even at a 25-degree angle, it appears to be traveling along the horizon. This study reveals that even experienced naval officers were fooled by the horizon effect, highlighting a misinterpretation of the camouflage's effectiveness.