DGCA Air Navigation important topics

These are the DGCA Air Navigation topics in the order they come up in the exams, most first. 376 questions in our Air Navigation bank came up in exam sessions.

Ready Aviator · Updated 24 October 2026

Questions that came up376

Topics ranked19

Rated Very high3

Most first. Start with the Very high topics, then the High ones, and leave the Low ones for last.

TopicExam importance

Altimeter and ISA33 questions in the bank came upVery high

Flight planning24 questions in the bank came upVery high

Gyro and electronic flight instruments40 questions in the bank came upVery high

Magnetism and compasses28 questions in the bank came upHigh

ASI, VSI and Machmeter32 questions in the bank came upHigh

Radar, SSR and DME19 questions in the bank came upHigh

Time and the solar system18 questions in the bank came upHigh

The earth, great circles and convergency20 questions in the bank came upHigh

Charts and projections21 questions in the bank came upHigh

DR navigation, 1 in 60 and CP/PNR14 questions in the bank came upMedium

GNSS, INS and RNAV16 questions in the bank came upMedium

Performance16 questions in the bank came upMedium

Radio altimeter and alerting systems13 questions in the bank came upMedium

Mass and balance14 questions in the bank came upMedium

VOR, RMI and VDF16 questions in the bank came upMedium

ADF and NDB19 questions in the bank came upMedium

ILS14 questions in the bank came upMedium

Radio theory10 questions in the bank came upLow

Air temperature, TAS and Mach9 questions in the bank came upLow

Where do I practise the top topics?

Altimeter and ISA. Altimeter (RK Bali), Measurement of DR Elements Pressure (RK Bali), The Pressure Altimeter (Oxford).
Flight planning. Flight Planning and Monitoring - Aero Planes (RK Bali).
Gyro and electronic flight instruments. Gyroscope (RK Bali), Basics of Electronic Displays (RK Bali), Electronic Flight Information System (Oxford), Gyroscopes (Oxford), Directional Gyro Indicator (Oxford), The Turn and Slip Indicator (Oxford).
Magnetism and compasses. Compass and Directions (RK Bali), Magnetism and Compasses (RK Bali), Earth Magnetism (Oxford), Terrestrial Magnetism (Oxford), Remote Indicating Magnetic Compass (Oxford).
ASI, VSI and Machmeter. ASI - Air Speed Indicator (RK Bali), Vertical Speed Indicator (RK Bali), Pitot and Static Sources (Oxford), The Airspeed Indicator (Oxford), The Vertical Speed Indicator (Oxford), The Machmeter (Oxford).
Radar, SSR and DME. RADAR, DME, GNSS (RK Bali), Doppler Radar Systems (Oxford), Radar Principles (Oxford), Airborne Weather Radar (Oxford), Secondary Surveillance Radar (Oxford), Distance Measuring Equipment (Oxford).
Time and the solar system. The Solar System (RK Bali), Time (RK Bali), Oxford - Time (Oxford).
The earth, great circles and convergency. The Earth (RK Bali), Convergency (RK Bali), Distances on Earth Surface (RK Bali), Direction, Latitude and Longitude (Oxford), Great Circles, Rhumb Lines & Directions on the Earth (Oxford), Convergency and Conversion Angle (Oxford), Departure (Oxford).
Charts and projections. Projections (RK Bali), Mercator Charts - Properties (Oxford).

How is the ranking made?

Every question in the bank carries the number of DGCA exam sessions it came up in. A topic's share is that number summed over its questions, against the whole subject.

Very high is half as much again as an even share or more, High an even share or more, Medium at least half of one, and Low less than that. The ranking moves as new sessions come in, and each chapter of the subject carries its topic's level.

Which questions came up?

Seen in exams lists them inside the subject, most seen first. The top 10 are free on a free account, and Pro shows the whole list, sorted by topic. Open Seen in exams

Common questions

What are the most important topics in DGCA Air Navigation?

Altimeter and ISA, Flight planning and Gyro and electronic flight instruments. Their questions come up most often in the exams, so learn them first. Then cover every chapter: the rest still come up.

Do DGCA exams repeat questions?

Often. Many questions come up in more than one exam session, which is why the topics rated Very high are the place to start. A repeat is still a question you have to work, so practise the chapter, not a list of answers.

Where can I see the questions that came up?

In Seen in exams, inside the subject on a free account. The top 10 in each subject are free, and Pro shows the whole list, sorted by topic.

Is the DGCA Air Navigation question bank free?

Sample questions in many chapters need no account, and a free account opens every question with its worked solution.

Practise the DGCA Air Navigation question bank

Every question with its worked solution, free with an account.

Keep reading

Important topics in the other subjects