ABSTRACT
Radials from any given VOR navigation aid are
the basis of airways; system accuracy is typically
within one degree. These are the standard routes
flown by aircraft when flying on instruments.
When two VOR radials intersect, they provide a
unique navigation position fix based (theta-
theta). The accuracy of this fix is greatest when
the radials intersect at right angles. Figure 10.11
illustrates how navigation charts are built up on a
network of VOR radials; the accuracy of VOR
radials is generally very good (±1 degree). In this
illustration, the navigation aid located near
Brussels (abbreviated BUB) transmits on 114.6
MHz. Three radials can be seen projected from
this navigation aid on 136°, 310° and 321°. These
radials are used to define airways A24 and G120.
Note the Morse code output and latitude/