quartz watch that is controlled by a radio signal from a cesium atomic clock. The result is extremely accurate time that can be measured on instruments. (radio-controlled)
An aircraft or its pilot sent ahead to locate and mark the target area for bombing
scout: someone who can find paths through unexplored territory
Pathfinder (original title in Sami: Ofelas and in Norwegian: Veiviseren) is a 1987 Norwegian film, directed by Nils Gaup. The film is based on an old Sami legend. The film inspired a 2007 remake.
An experimental plan or forecast
The Pathfinder was a Brass Era car built in Indianapolis, Indiana from 1912 to 1917.
A person who goes ahead and discovers or shows others a path or way
Atomic Bomb
An Atomic Bomb explodes at Frenchman's Flats, near Las Vegas, Nevada, in 1953. When they were going to test a bomb, they would let the people in Las Vegas know so they could all go out and watch it from far away at the hotels. It was a favorite attraction.
Atomic Cloud
Wow! Saw this huge thunder cloud approaching at dusk while watching my nephew's football game in Clintonville, Wisconsin. Aug 19, 2011.