Results
#1. An aircraft receives a QTE from Oxford ATC of 240°(T). What bearing should be plotted from Oxford on a Mercator chart? Convergency between the aircraft and Oxford is 4°.
#2. Now repeat the problem using Auckland, New Zealand – a Southern Hemisphere problem.
#3. An aircraft in the Northern Hemisphere has a VOR (RMI) reading of 310° to position X. Variation at the aircraft position is 5°E. Variation at the VOR position is 2°E. What bearing should be plotted on a Mercator chart from the beacon to the aircraft? (Earth convergency is 8°).
For VOR problems, use beacon variation
For NDB problems, use aircraft variation
#4. An aircraft flying in the Northern Hemisphere on a heading of 155°M measures the relative bearing of NDB‘Z’ on an RBI as 130°(R). Variation at the NDB is 5°W. Variation at the aircraft is 8°W. If the Earth Convergency between the aircraft and the NDB is 4°, what bearing should be plotted from the beacon to the aircraft on a Mercator chart?
#5. An aircraft in the Northern Hemisphere is flying on a heading of 045°M. The ADF is tuned to NDB ‘Q’ and the RMI reads 090°. Variation at NDB ‘Q’ is 2°E and at the aircraft is 2°W. Earth convergency between the aircraft and the NDB is 10°. What bearing should be plotted from the NDB on a Mercator chart?
Great Circle bearing to NDB = 088°(T)
Conversion angle (CA) = ½ EC = ½ x 10 = 5°
Rhumb line bearing to NDB = 088°(T) 5°
= 093°(T)
Rhumb line from NDB to aircraft = 093 ± 180°(T)
Answer : Bearing to plot from NDB = 273°(T)
#6. An aircraft receives a QTE from airfield ‘A’ of 063°T. Airfield A is in the Northern Hemisphere. The convergency between the aircraft and the airfield is 6°. What bearing should be plotted on a Mercator chart from the airfield?
#7. An aircraft receives a QTE from airfield ‘B’ of 315°(T). Airfield B is in the Southern Hemisphere. The convergency between the aircraft and the airfield is 2°. What bearing should be plotted on a Mercator chart from the airfield?
#8. An aircraft flying in the Northern Hemisphere has an RMI reading of 050° to VOR beacon ‘C’. Variation at the aircraft is 5°E. Variation at the VOR beacon is 8°E. If the convergency between the aircraft meridian and the VOR meridian is 4°, what bearing should be plotted on a Mercator chart from the beacon to the aircraft?
#9. An aircraft flying in the Southern Hemisphere has an RMI reading of 130° to VOR beacon ‘D’. Variation at the aircraft is 5°W. Variation at the VOR beacon is 2°W. If the convergency between the aircraft meridian the VOR meridian is 2°, what bearing should be plotted on a Mercator chart from the beacon to the aircraft?
#10. An aircraft and an NDB are in the Northern Hemisphere. The aircraft’s heading is 236°M. Variation is 13°W at the aircraft and 11°W at the NDB. The relative bearing (RBI) of the NDB is 226° (R). Convergency between the aircraft’s meridian and the meridian of the NDB is 4°. What bearing should be plotted from the NDB on a Mercator chart?
#11. Repeat Question 5 but with the aircraft and the NDB being in the Southern Hemisphere
#12. .
a. Southern
b. 012°E
c. 002°E