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FLIGHT Section 3261 VHF RECEIVERS 5. USE OF V.A.R.'S FOR INSTRUMENT FLIGHT AND APPROACH If using L.F. ranges on previous course: Place BC-733 (localizer receiver on proper channel for VAR range to be flown far enough in advance of arrival over fix to assure normal operation and identification of station. Proceed from intersection of Visual (UL-FHH-ME) leg using a colored chart or plate to assure relative positions of color quadrants Maintain altitude as required according to route procedure or clearance until over the range station. Lower landing gear, change to landing tanks, Auto or Full rich, reduce speed to 120 mph. Using the colored range procedure plate, fly out appropriate leg descending to minimum altitude approximately 3 min. out; procedure turn according to plate if visual leg approximately 1 dot off target in still air or light wind will be sufficient. Return to station descending to minimum altitude over station holding close to target area of visual indicator after passing station, continue with approach applicable until minimums are reached. If on visual course use care to be within the range of the target or not over 1 dot either side. When nearing the station very small corrections should be made, using Gyro for course corrections. In aural legs standard aural procedure will apply, smaller course corrections should be made, however, and care must be taken to recognize the instant of station passage where no Z marker is installed. Of course over station radio contacts, i.e. altimeter settings, etc., will be in accordance with regular procedure. 1 COMMON ERRORS 1. Flying aural course too broad, due to interpretation of bi-signal. Fly closely. 2. Assuming a course perpendicular to aural in orientation after hearing a bi-signal. The bi-signal can be heard in open quadrant if volume control is set too high. 3. Too many adjustments of volume control on visual leg and missing station because opposite signal is not recognized. One or two changes only may be desired. 4. Use of indicator as a flight instrument (i.e. needle chasing). Indicator should be used as a navigation instrument. 2/1/47 FLIGHT
