click on photo for more images
designated the L-19, the Bird Dog was used by the USAF,
Army and Marines for artillery spotting, front-line communications,
medical evacuation and pilot training. The U.S. Air Force
ordered more than 3,200 between 1950 and 1959.
In 1962, the Bird Dog was re-designated the O-1
and was used in Vietnam as a Forward Air Controller to direct strike
aircraft to ground targets.