ATM Lesson 4 Flashcards
(41 cards)
Which ICAO document contains the standard RT phraseology
Doc 9432
Why might a pilot ask “For crew coordination, confirm the cleared level/speed/etc
The pilots disagree of what they heard on the RT leaving at least 1 pilot unsure of the instruction
What document contains the UK variants of standard RT
CAP 413
What is the maximum number of pieces of important information to be included in one radio transmission, when may this differ
Three, for a particularly complex instruction such as a level change with a restriction two pieces of information may be more appropriate
Why must a mandatory readback item not be given alongside a frequency change
Pilot may make a readback error and transfer off frequency before it is corrected
How is an ATC clearance defined
An authorisation for an aircraft to proceed under conditions specified by an ATCU
How is a clearance limit defined
The point to which an aircraft is granted an air traffic control clearance
Can an aircraft making stops along to its final destination be given clearance all the way to said final destination
No, would only be cleared to the first stop
How is an ATC instruction defined
Directives issued by ATC for the purpose of requiring a pilot to take a specific action without delay
What is the contents of an ATC instruction
Callsign and the action to take
Can a clearance contain an instruction
Yes
Why are conditional clearances rarer in area controlling compared to aerodrome controlling
Likelihood for misunderstanding
What is standard separation including FL and vertical distances
Below FL290 1000ft vertically
At or above FL290 2000ft
How does RVSM differ from standard separation
In RVSM between FL290 to FL410 1000ft vertical separation permitted. 2000ft after FL410 hence next usable level would be FL430
What four requirements are there to operate RVSM as an aircraft
2 independent altimeters with tight tolerances and maintenance schedules
Mode C (at least)
Automatic altitude control system (FMS)
Altitude alerting device (if aircraft deviates from selected altitude/FL)
How do FL allocations differ for westbound and eastbound aircraft
Westbound even
Eastbound odd
What symbol appears on NODE if an non-RVSM aircraft approaches or enters RVSM airspace
Hamburger, will trigger close to FL290 so no action might be required
On a strip, what do the codes RVA, RVN, RVU, RVX denote and which is not displayed on a strip
RVA - RVSM approved
RVN - NOT RVSM approved
RVU - RVSM unknown
RVX - RVSM exempt
RVA not shown as most a/c RVSM. Equip shows W for RVSM. C for NO RVSM
What must be done before Mode C data is used to vertically separate aircraft
Mode C must be verified
Typically an aircraft can be cleared to a level that another a/c reported vacating, in what three situation can this not be done
- Sever turbulence known, vacating a/c may be avoiding it
- Higher aircraft is cruise climbing as slow rate of climb
- Higher aircraft poor climber but lower aircraft good climber
In a stack in particular, what controlling technique can be used to maintain vertical separation when aircraft are descending through the stack
Set max descent rates. Eg higher a/c limited to 1000ft per min or less. Lower aircraft limited to 1000ft per min or more
How is longitudinal separation defined
Maintaining an interval between aircraft operation on the same, converging or reciprocal tracks. Expressed in time or distance
What sort of track is this
Crossing track. An intersecting track that cannot be classified as same or reciprocal track
What sort of track is this
Same track. One aircraft traveling in the same general direction or within 45° of the track of another aircraft
