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ATSEP BASIC EXAM 2026 WITH
QUESTIONS AND CORRECT ANSWERS
What type of surveillance is regarded Non-cooperative, independent
surveillance? - correct answer-PSR radar
What surveillance technique is ADS-B? - correct answer-Cooperative,
dependent surveillance
What is an example of Cooperative, Independent surveillance? - correct
answer-SSR radar
How is an aircraft detected by the PSR? - correct answer-By reflected
electromagnetic energy transmitted from the radar
What is radar clutter on an ATM radar? - correct answer-Unwanted targets
What is a limitation to the PSR radar? - correct answer-No identification of
received echoes
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What is meant by PRI? - correct answer-Pulse repetition interval
What is the purpose of the duplexer? - correct answer-To alternately switch
the antenna between receiving and transmitting
What is the operating principle of the aircraft transponder? - correct
answer-To code a reply on the 1090MHz frequency in response to a SSR
radar interrogation
What is transmitted on a Mode C reply from a transponder? - correct
answer-Pressure altitude
What is it called when replies from 2 aircraft overlap causing errors in
extracting the included data? - correct answer-Garbling
What is a disadvantage of the classical SSR radar? - correct answer-
Garbling can occur if 2 aircraft are close in slant range and on the same
bearing
What is a feature of Mode S? - correct answer-Selective interrogations to
reduce FRUIT
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What is provided with Mode S enhanced surveillance? - correct answer-
Downlinked aircraft parameters
What is a feature of the Monopulse SSR radar? - correct answer-Improved
azimuth resolution and fewer pulses needed to determine position
ADS (automatic dependent surveillance) is a surveillance technique for use
by ATS in which: - correct answer-Aircraft automatically provide, via data
link, data from on-board navigation systems
What is a feature of ADS-B? - correct answer-High update rate and simple,
omnidirectional receivers
Which airborne equipment supports the 1090ES messages? - correct
answer-The Mode S transponder
What is the dominant ADS-B data link technology in Europe? - correct
answer-1090 extended squitter
What is the purpose of Mode S Short squitter? - correct answer-
ACAS/TCAS interrogations
ATSEP BASIC EXAM 2026 WITH
QUESTIONS AND CORRECT ANSWERS
What type of surveillance is regarded Non-cooperative, independent
surveillance? - correct answer-PSR radar
What surveillance technique is ADS-B? - correct answer-Cooperative,
dependent surveillance
What is an example of Cooperative, Independent surveillance? - correct
answer-SSR radar
How is an aircraft detected by the PSR? - correct answer-By reflected
electromagnetic energy transmitted from the radar
What is radar clutter on an ATM radar? - correct answer-Unwanted targets
What is a limitation to the PSR radar? - correct answer-No identification of
received echoes
,2 |Page
What is meant by PRI? - correct answer-Pulse repetition interval
What is the purpose of the duplexer? - correct answer-To alternately switch
the antenna between receiving and transmitting
What is the operating principle of the aircraft transponder? - correct
answer-To code a reply on the 1090MHz frequency in response to a SSR
radar interrogation
What is transmitted on a Mode C reply from a transponder? - correct
answer-Pressure altitude
What is it called when replies from 2 aircraft overlap causing errors in
extracting the included data? - correct answer-Garbling
What is a disadvantage of the classical SSR radar? - correct answer-
Garbling can occur if 2 aircraft are close in slant range and on the same
bearing
What is a feature of Mode S? - correct answer-Selective interrogations to
reduce FRUIT
, 3 |Page
What is provided with Mode S enhanced surveillance? - correct answer-
Downlinked aircraft parameters
What is a feature of the Monopulse SSR radar? - correct answer-Improved
azimuth resolution and fewer pulses needed to determine position
ADS (automatic dependent surveillance) is a surveillance technique for use
by ATS in which: - correct answer-Aircraft automatically provide, via data
link, data from on-board navigation systems
What is a feature of ADS-B? - correct answer-High update rate and simple,
omnidirectional receivers
Which airborne equipment supports the 1090ES messages? - correct
answer-The Mode S transponder
What is the dominant ADS-B data link technology in Europe? - correct
answer-1090 extended squitter
What is the purpose of Mode S Short squitter? - correct answer-
ACAS/TCAS interrogations
