NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Confirmation of a story I was told
From: W F Jones
Date: 2014 Jan 03, 08:56 -0500
From: W F Jones
Date: 2014 Jan 03, 08:56 -0500
I've encountered "FireTacks" in some local parks while hiking that are retroreflectors (1000+) in a 1 cm square area arrangement. The tacks are easily followed at night to the general area of a geocache. They are frequently about 6-10 feet above ground level and stuck in a tree trunk. Frank Rochester, NY On 1/2/2014 9:37 PM, Norm Goldblatt wrote: > 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 > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ---------------------------------------------------------------- > > Attached File: http://fer3.com/arc/imgx/retroreflector-back.jpg > Attached File: http://fer3.com/arc/imgx/retroprism-front.JPG > > > : http://fer3.com/arc/m2.aspx?i=126139 > > > > >
