Navigation Flashcards
How to perform airborne VOR check
Dual receivers method - Tune two VOR receivers to same station and note disparity
Airborne method - fly over a known landmark on a known radial and se if indicated and actual position match
What is northerly turning error?
Compass lags turns to the south and leads turns to the north
How to calculate rate of decent needed for 3 degree glide path
Ground speed times 5
Drift correction formula
300/TAS= #of degrees change for each 5 kts crosswind
How to know if VOR station is working
Tune to station frequency and hear morse code ident
LO chart scale and altitude covered
Covers up to but not including 18000’ ASL
No standard scale
VOR check tolerances
+/- 6 degrees for landmark method
4 degree disparity for dual receiver method
Compass acceleration error
on east/west headings shows turn toward north upon acceleration and toward south upon deceleration
VOR/GPS receiver CDI increments
VOR: 2 degrees per dot full deflection = 10 degrees
GPS: 1 mile per dot full deflection = 5 miles
LO chart projection used
Lambert conformal conic
Published radial accuracy tolerance
+/- 3 degrees
Aviation communications frequency band
118.0 - 137.0 MHz
ADF power output categories
Low = less than 50 watts
Medium = 50 - 2000 watts
High = more than 2000 watts
ADF errors
- Shoreline effect - Radio waves bend as they pass from land to water. most pronounced within a 30 degree angle from parallel with coastline
- Mountain effect - radio waves bounce off mountains
- Night effect - Ionosphere becomes refractive at night shooting erroneous waves to receiver. Select station with lower frequency to minimize.
- Bank error - The two ADF antennae change relative position while aircraft is banked. ADF readings unreliable in a turn.
- Static interference - ADF is subject to interference from storms, ore deposits.
ADF frequency operation range
LF/MF
Heavy lined box on VNC meaning
Maned FSS at aerodrome
Class F airspace entry requirements
Advisory - May enter with caution
Restricted - must obtain permission from person sited in the DAH