Random3 Flashcards
Which waves refract and reflect using properties of the ionosphere?
Sky waves - High frequencies (HF)
Which waves diffract ?
Ground waves. They bend around obstacles and follow the curvature of the earth.
What can the DME sometimes be collocated with?
The VOR or sometimes the ILS.
What is the range for a Primary radar?
60 - 120 NM
What is the range for a secondary radar?
200 - 250 NM
True or false. Transponders are not needed for a controlled airspace.
False. They are needed.
Where is the cone of silence located?
Above the radar antenna.
What is a “Squawk”?
A four digit identifying code that the pilot enters into a transponder for each flight. It helps ATC recognize each airplane.
What are the different modes of a transponder and what are their capabilities?
Mode A: Transmits identifying code only.
Mode C: Enables ATC to see aircraft altitude or FL.
Mode S: Has altitude capability and also data exchange with ADS-B. It allows aircraft to interrogate satellites to give info.
Which transponder mode equipment are mandatory for many areas of controlled airspace?
Mode C and S
What waves do radars use?
Microwaves.
Transponders are mandatory for MLAT to work. True or False?
True.
What is the difference between ADS-B In and ADS-B out?
ADS-B In: allows aircraft to receive info about other aircraft flying nearby improving situational awareness. It includes both ADS-B in and out.
ADS-B Out: allows broadcast to the ground stations with info regarding airspeed, altitude and location.
How is ADS B In and Out represented on the flight plan?
“B2” ADS-B In
“B1” ADS- B Out
What is ADS-B ?
Automatic Dependent Surveillance Broadcasting. It was developed as a viable, low cost replacement for radar. It provides more frequent updates than radar.
