NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Norm Goldblatt
Date: 2014 Jan 2, 18:32 -0800
Attached is a photo of a beautiful retroprism I've had for decades. The guy who gave it to me said that it was one of many that framed the edges of a WWII US carrier. They were used to provide visual guide when there were enemies in the sky and blackout called. The idea is that these retroprisms always reflect light back in the direction from whence it came. A US pilot, with a lamp mounted on his head could see light from all the reflectors, as angle of incidence didn't matter, and the enemy could see nothing as it was unlikely that they had light sources so situated. Fiendishly clever, but true? Anyone ever hear this? Even if you say it's bunk, I'll still tell the story.
Norm
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