[Documents

Aids to air navigation Congresses International Symposium on the U. S. Domestic Short Distance Navigation System - VORTAC - and Its Relationship to the International Air Navigation System, Washington, D. C., and Indianapolis, 1958 Omnirange system Tacan International Symposium on the U.S. Domestic Short Distance Navigation System--VORTAC--and Its Relationship to the International Air Navigation System (1958 : Washington, D.C.; Indianapolis, Ind.)