Instruments TD 77

Question 1

If you are en-route and decide to change your airspeed, when do you have
to contact ATC regarding the change?

Answer 1

When the change in true airspeed is by 5% or 10 knots (whichever is greater) from what was filed in the flight plan.

Question 2

Define “circle to runway” and “circle to land”.

Answer 2

Circle to Runway: Used by ATC to inform the pilot that he must circle to land because the runway in use is other than the runway aligned with the instrument approach procedure.

Circle to Land: a maneuver initiated by the pilot to align the aircraft with a runway for landing when a straight in landing from an instrument approach is not possible or is not desirable. Made only after ATC authorization has been obtained and the pilot has established visual reference of the airport.

Question 3

During radar vectors for an approach, at what point would you initiate lost
commo procedures?

Answer 3

Initiate lost commo procedures if no transmissions are received for approximately:

One minute when being vectored in
15 seconds while on ASR final approach
5 seconds while on PAR final approach.