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ATSEP BASIC EXAM | {LATEST 2026/ 2027 UPDATE}
COMPLETE ACTUAL AND AUTHENTIC EXAM | BRAND
NEW!
What type of surveillance is regarded Non-cooperative, independent
surveillance? ......ANSWER......PSR radar
What surveillance technique is ADS-B? ......ANSWER......Cooperative, dependent
surveillance
What is an example of Cooperative, Independent surveillance?
......ANSWER......SSR radar
How is an aircraft detected by the PSR? ......ANSWER......By reflected
electromagnetic energy transmitted from the radar
What is radar clutter on an ATM radar? ......ANSWER......Unwanted targets
What is a limitation to the PSR radar? ......ANSWER......No identification of
received echoes
What is meant by PRI? ......ANSWER......Pulse repetition interval
What is the purpose of the duplexer? ......ANSWER......To alternately switch the
antenna between receiving and transmitting
pg. 1
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What is the operating principle of the aircraft transponder? ......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?
......ANSWER......Pressure altitude
What is it called when replies from 2 aircraft overlap causing errors in extracting
the included data? ......ANSWER......Garbling
What is a disadvantage of the classical SSR radar? ......ANSWER......Garbling can
occur if 2 aircraft are close in slant range and on the same bearing
What is a feature of Mode S? ......ANSWER......Selective interrogations to reduce
FRUIT
What is provided with Mode S enhanced surveillance?
......ANSWER......Downlinked aircraft parameters
What is a feature of the Monopulse SSR radar? ......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: ......ANSWER......Aircraft automatically provide, via data link, data
from on-board navigation systems
What is a feature of ADS-B? ......ANSWER......High update rate and simple,
omnidirectional receivers
pg. 2
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Which airborne equipment supports the 1090ES messages? ......ANSWER......The
Mode S transponder
What is the dominant ADS-B data link technology in Europe?
......ANSWER......1090 extended squitter
What is the purpose of Mode S Short squitter? ......ANSWER......ACAS/TCAS
interrogations
What is variation? ......ANSWER......The difference between true and magnetic
north
What is meant by instrument flight rules? ......ANSWER......Flying by reference to
instruments in the flight deck, and navigation is accomplished by reference to
electronic signals
What is the most common geodetic reference system with global coverage?
......ANSWER......WGS 84
What is meant by "dead reckoning"? ......ANSWER......Determining position
based on known speed, course and elapsed time
What is meant by "course" in relation to aircraft movement?
......ANSWER......The direction over the ground the aircraft is moving
pg. 3
ATSEP BASIC EXAM | {LATEST 2026/ 2027 UPDATE}
COMPLETE ACTUAL AND AUTHENTIC EXAM | BRAND
NEW!
What type of surveillance is regarded Non-cooperative, independent
surveillance? ......ANSWER......PSR radar
What surveillance technique is ADS-B? ......ANSWER......Cooperative, dependent
surveillance
What is an example of Cooperative, Independent surveillance?
......ANSWER......SSR radar
How is an aircraft detected by the PSR? ......ANSWER......By reflected
electromagnetic energy transmitted from the radar
What is radar clutter on an ATM radar? ......ANSWER......Unwanted targets
What is a limitation to the PSR radar? ......ANSWER......No identification of
received echoes
What is meant by PRI? ......ANSWER......Pulse repetition interval
What is the purpose of the duplexer? ......ANSWER......To alternately switch the
antenna between receiving and transmitting
pg. 1
,2|Page
What is the operating principle of the aircraft transponder? ......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?
......ANSWER......Pressure altitude
What is it called when replies from 2 aircraft overlap causing errors in extracting
the included data? ......ANSWER......Garbling
What is a disadvantage of the classical SSR radar? ......ANSWER......Garbling can
occur if 2 aircraft are close in slant range and on the same bearing
What is a feature of Mode S? ......ANSWER......Selective interrogations to reduce
FRUIT
What is provided with Mode S enhanced surveillance?
......ANSWER......Downlinked aircraft parameters
What is a feature of the Monopulse SSR radar? ......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: ......ANSWER......Aircraft automatically provide, via data link, data
from on-board navigation systems
What is a feature of ADS-B? ......ANSWER......High update rate and simple,
omnidirectional receivers
pg. 2
, 3|Page
Which airborne equipment supports the 1090ES messages? ......ANSWER......The
Mode S transponder
What is the dominant ADS-B data link technology in Europe?
......ANSWER......1090 extended squitter
What is the purpose of Mode S Short squitter? ......ANSWER......ACAS/TCAS
interrogations
What is variation? ......ANSWER......The difference between true and magnetic
north
What is meant by instrument flight rules? ......ANSWER......Flying by reference to
instruments in the flight deck, and navigation is accomplished by reference to
electronic signals
What is the most common geodetic reference system with global coverage?
......ANSWER......WGS 84
What is meant by "dead reckoning"? ......ANSWER......Determining position
based on known speed, course and elapsed time
What is meant by "course" in relation to aircraft movement?
......ANSWER......The direction over the ground the aircraft is moving
pg. 3
