The letters ATOP on this patch stand for "Advanced Technology Observation Platform", whose first flight was on October 28, 1990. The Latin Phrase Furtim Vigilans translates as "Vigilance Through Stealth". This brand new patch is 4" length, 3 1/2" width, made of 100% embroidery and features a plastic backing. This patch comes from the published book "I Could Tell You Then You Would Have To Be Destroyed By Me."
