Avielevate / DGCA CPL papers / Air Navigation / Dead Reckoning Navigation
Dead Reckoning Navigation — DGCA CPL Air Navigation
Chapter 04 of the Air Navigation paper. 157 practice questions in the Avielevate bank, every one with its answer key, filterable into a timed set on this chapter alone.
What this chapter covers
The learning objectives we file Dead Reckoning Navigation questions under, and how many sit behind each. These come straight out of the bank and are regenerated whenever it changes — they are what is there today, not a claim.
| Learning objective | In the bank |
|---|
| 0204 Dead Reckoning & the Navigation Computer | 131 questions |
| 0206 Speed, Mach Number & Altimetry | 26 questions |
Sample Dead Reckoning Navigation questions, answered and explained
Real questions from this chapter, with the answer marked and the reasoning written out — the same explanations you get inside the app.
020022 · Dead Reckoning Navigation
An aircraft flies a true heading of 076° at a TAS of 235 kt, in a wind of 040°/40 kt. Calculate the drift angle and groundspeed.
- A5R - 207 kt
- B7R- 204 kt
- C7L- 269 kt
- D5L - 255 kt
Why that is the answer
Resolving the TAS of 235 kt along the true heading of 076° into north/east components, and separately resolving the given wind (040°/40kt, blowing toward 220°) into its own components, allows the groundspeed vector to be built as their vector sum (GS = TAS + W/V). Adding the components gives a resultant groundspeed of about 204 kt on a track close to 083°T. Since the track (083°) is numerically greater than the heading (076°), the aircraft has drifted to the right of its heading, giving a drift of about 7° right. Option (a) 5R−207kt and (d) 5L−255kt use an incorrect drift magnitude and sign respectively, while (c) 7L−269kt gets the drift magnitude right but the sign and resulting groundspeed wrong, effectively treating the wind as a tailwind pushing the track left instead of right.
- Resolve TAS (235 kt) along heading 076°T into N/E components
- Resolve W/V (040°/40kt, blowing toward 220°) into N/E components
- Add vectors: GS vector = TAS vector + Wind vector
- Magnitude of GS vector ≈ 204 kt; track direction ≈ 083°T
- Drift = Track − Heading = 083° − 076° ≈ 7° Right
- Result: 7° Right drift, GS ≈ 204 kt
025169 · Dead Reckoning Navigation
If a pilot changes the altimeter setting from 30.11 to 29.96, what is the approximate change in indication?
- AAltimeter will indicate .15 inches Hg higher.
- BAltimeter will indicate 150 feet higher.
- CAltimeter will indicate 150 feet lower.
- DAltimeter will indicate 1500 feet lower.
Why that is the answer
Reducing the altimeter setting from 30.11 to 29.96, a drop of 0.15 in Hg, lowers the indicated altitude by about 150 feet.
- The standard approximation for altimeter setting changes is that each 0.01 inch Hg of setting change corresponds to about 10 feet of indicated altitude change, following the rule 'lower is lower, higher is higher' for setting adjustments.
- Calculate the setting change: 30.11 minus 29.96 equals a decrease of 0.15 inch Hg.
- Convert to feet: 0.15 in Hg times 1,000 feet per inch Hg (10 feet per 0.01 in Hg) equals a 150-foot change.
- Because the setting was lowered, the altimeter's indication also decreases, so the correct direction is a decrease, matching option C and ruling out option B, which has the right magnitude but the wrong direction.
- Option A incorrectly restates the pressure difference itself (.15 inches Hg) rather than converting it to the requested altitude change in feet, so it does not answer the question asked.
- The 150-foot decrease confirms option C as correct.
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Frequently asked
How many Dead Reckoning Navigation questions are there for the DGCA CPL Air Navigation paper?
Avielevate's bank carries 157 published Dead Reckoning Navigation questions for Air Navigation, mapped across 2 learning objectives. Every one has its answer key, and explanations are being written across the whole bank.
How much of the Air Navigation paper is Dead Reckoning Navigation?
The DGCA does not publish a per-chapter breakdown of its papers, so nobody can honestly tell you — and we will not guess. What we can tell you is what students who have just sat a paper reported meeting, which is measured rather than rumoured: that is the exam recall report inside the app.
What is the best way to revise Dead Reckoning Navigation?
Sit a short timed set on this chapter alone, tag how sure you were of each answer, then drill the two that actually leak marks: the ones you got right while guessing, and the ones you got wrong while confident. Avielevate does that tagging for you and puts anything you got wrong back in front of you on a spaced schedule.
The rest of the Air Navigation paper
One account covers every chapter of every paper.
← All Air Navigation chapters · All six DGCA CPL papers