Navigation Flashcards
VOR check: what to record?
Date, place, bearing error, signature
VOR Test Allowable Error
+/- 4 degrees for dual VOR comparison, designated ground check point, or VOT
+/- 6 degrees for airborne checkpoints
Range and service voulme for the 3 classes of VOR/VORTAC facilities
T: Terminal
- 25nm
- 1000-12000ft
L: Low altitude
- 40nm
- 1000-18000ft
H: High Altitude
- 40nm from 1000-14500
- 100nm from 14500-18000
- 130nm from 18000-45000
- 100nm from 45000-60000
Slant range error negligible beyond
1 mile per 1000 feet above facility elevation
DME Arc Bearing Corrections
10-20 degrees for each 1/2 mile of deviation
VOR Deflection scale
2 degrees per dot (full scale = 10+ degrees)
VOR radial divergence rate
100ft per nm per degree
Steps to orient where the aircraft is in relation to the VOR using an HSI
- Identify radial selected (arrowhead)
- Determine hemisphere (TO/FROM)
- Determine quadrant and distance from course (needle direction and deviation amount)
- Determine heading within quadrant
*Be sure to account for reverse sensing if flying a localizer back course (you’ll know because the HSI is tuned to the reciprocal of the inbound course)