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FLIGHT
Section 3261   VHF RECEIVERS
2. VHF-Visual Aural Ranges Cont'd.
It may be noted that the dots on the indicator open up another right side traffic separation possibility.
3. The present method of identifying different range legs is as follows:
Visual--
Yellow, 60 degrees Hatch marks along course. 
Blue, solid bar on course.
Aural--
N sector, solid bar.
A sector, shaded bar.
Determination of relative positions.
Localizer--
Blue sector always on right side inbound on approach course.
VHF Ranges--
Green and Red airways.
Blue sector north of visual course, yellow south.
N Sector east of aural course, A west.
Amber and Blue airways.
Blue sector west of visual course, yellow east.
Visual courses are on airway, aural perpendicular.
A study of the attached sketches show the complete simplicity of the orientation problem as two indications are given simultaneously, i.c., Blue N, Blue A, Yellow N or Yellow A. Therefore it is only necessary to assume a course that will intercept the desired leg.
Bent legs and electrical interference on the visual legs are easily identified as the needle swings in a rapid and erratic manner. The tone of the reproduced aural signals is such that static appears to be at a minimum, and other signals (Co., etc.) are easily heard above the signal.
A very flat change of signal will be noted so fewer volume control adjustments will be needed.
NOTE: The last range (VAR) before a terminal where a localizer is installed will always have the identical color code as the localizer installation.
2/1/47   FLIGHT