Aerial observation of forest fires started in Mauricie in 1919.
12.
Unexplained aerial observations have been reported throughout history.
13.
About ten such " balloon tenders " were built, their main objective being aerial observation posts.
14.
Indeed, it is aerial observations of the destroyed reactor that were more likely to be flawed.
15.
The entire system was elaborately camouflaged from aerial observation and was constantly being maintained, expanded, and improved.
16.
Lowe's first assignment was with the Topographical Engineers, where his balloon was used for aerial observations and map making.
17.
British aerial observations revealed German troops massing in trenches less than two kilometres south of Villers-Bretonneux in Hangard Wood.
18.
During the 1930s, Brooks was the center of aerial observation activity and several units were trained in tactical observation.
19.
The demand for artillery fire adjustments through aerial observation was constant in spite of difficulties encountered with air-to-ground communication.
20.
The demand for artillery fire adjustments through aerial observation was constant in spite of difficulties encountered in air-to-ground communications.
