Navigation Solutions:

The following were taken from Trevor Thom’s “Meteorology & Navigation.”  (June 03, 2003).

The NAV-AID RULE (PLUS) can solve all of these problems in a few minutes without any need of complex calculations or the use of the well known “pray-wheel”.

24. You are 2 nm left of track after travelling 15 nm.

 (a) What is the track error?

(b) To regain track in another 15 nm, what is the closing angle (CA)?

(c) To regain track in another 30 nm, what is the CA?

25. You are 4 nm right of track after travelling 20 nm.

By how many degrees should you change your heading by to regain track in another 40 nm?

26. You are on a flight from Alice Springs to Tennant Creek, which is a distance of 249 nm. After flying a steady HDG for 96 nm you find yourself 13 nm right of track.

By what should you alter your HDG by to regain track:

(a) At Tennant Creek?

(b) 50 nm before Tennant Creek?

(c) 20 nm before Tennant Creek

27. At 0315 UTC you are on track, HDG 080M. At 0325 UTC you are 3 nm left of track after travelling 20 nm.

 By what amount should you alter HDG to be back on track at 0335 UTC?

28. We obtain a fix 5 nm left of track and make a HDG correction in an attempt to return to track. 20 nm further     on we find that we are now 8 nm left of track.

(a) What is the TE?

(b) What is the CA if we want to return to track in another 60 nm?

(c) What should we alter HDG by to do this?

29. You are 3 nm left of track and make a HDG change to regain track. 30 nm later you pinpoint your position as 3 nm right of track.

(a) What is your TE?

(b) What is the CA to regain track in another 15 nm?

(c) If your HDG was 110°M, what should you alter it to?

30. after steering 320°M you are 2 nm left of track in 15 nm and wish to regain track in another 30 nm.

(a) What is your TE?

(b) What is your CA?

(c) What should you alter HDG too initially?

(d) What should you alter HDG to upon regaining track?

31. You are steering 293ºM and 4 nm right of track after 34 nm.

(a) What is the TE?

(b) What is the CA to regain track in another 48 nm?

(c) What HDG should you take up to regain track?

(d) Once on track, what would you expect your HDG to be?

Visual Navigation Procedures         Aviation Theory Centre 14-43.