Special surveyor's transits placed at each end of 1645-ft base line make simultaneous observations of aircraft suspected of flying below legal limit adjacent to Oakland (Calif) international airport; special peep sight gives effect of gun sight.
Low-flying aircraft spotted by transit triangulation
Pub Works
Public Works ; 87 , n 2
1956
2 pages
Aufsatz (Zeitschrift)
Englisch
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Medium-range localisation of aircraft via triangulation
Tema Archiv | 2000
|Engineering Index Backfile | 1941