EQT 7 Mode S

Question 1

What does the S in Mode S stand for

Answer 1

Selected

Question 2

What frequency does mode S use

Answer 2

1030 & 1090mhz

Question 3

How many code possibilities with Mode S

Answer 3

16.75 million

Question 4

What are the 2 phases in Mode S

Answer 4

Acquisition- tracks conventional transponders and looks for Mode S. Remembers the Mode S individual addresses

Address surveillance phase - Mode S a/c interrogated individually for identification, altitude etc

Question 5

What 2 stages is Mode S being implemented in

Answer 5

ELS - elementary
Call sign- Mode a codes not needed as c/S will show up as linked to a/c

EHS - enhanced
Heading speed specified flight level

Question 6

What are DAPs

Answer 6

Downlink aircraft parameters

Question 7

What are the benefits of Mode S

Answer 7

Reduces fruiting and garbling

Provides data link

Question 8

What are the capabilities of Mode S

Answer 8

Shows altitude in 25ft increments

A/c airborne or on the ground indicated

A/c ID for elementary surveillance

Question 9

What is Mode s multilateration

Answer 9

Provides accurate surveillance and ID of all transponder equipped a/c on airport surface

Supplements or replaces GMS/SMR