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20 Cards in this Set

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IFR aircraft separation minima up to and including FL410.

1,000 feet

Separation minima for non-RVSM aircraft between FL290 and FL410.

2,000 feet

RVSM flight levels

FL290-FL410

Separation minima above FL410

2,000 feet

Assign an altitude to an aircraft after the aircraft previously at that altitude has been issued a climb/descent clearance and ___.

is observed (valid Mode C) or reports leaving the altitude

Altitude assignment phraseology


  • "MAINTAIN/CRUISE (altitude)."
  • "CLIMB AND MAINTAIN (altitude)."
  • DESCEND AND MAINTAIN (altitude)."

Phraseology to obtain an altitude report


  • "REPORT LEAVING/REACHING (altitude/flight level)."
  • "REPORT LEAVING ODD/EVEN ALTITUDES/FLIGHT LEVELS."
  • "SAY ALTITUDE."
  • "SAY FLIGHT LEVEL."
  • "SAY ALTITUDE OR FLIGHT LEVEL."

When applying vertical separation minima, consider:

  • Known aircraft performance characteristics
  • Information indicating that the climb/descent rates are not consistent with the rates recommended in the AIM

Assign an altitude to an aircraft only after the aircraft previously at that altitude has reported at or passing through another altitude separated from the first by the appropriate minima when:

  • Severe turbulence is reported
  • Military aircraft are conducting aerial refueling
  • The aircraft previously at that altitude has been issued climb/descent at pilot's discretion or cruise clearance

Crossing restriction permits descent at ___.

pilot's discretion

When descending at pilot's discretion, the pilot may level off at any altitude, but ___.

once an altitude is vacated, the pilot must not return to it.

Approach clearance permits descent at ___.

pilot's discretion

Pilot's discretion phraseology

  • "CLIMB/DESCEND AT PILOT'S DISCRETION."
  • CLIMB/DESCEND NOW TO (altitude). THEN CLIMB/DESCEND AT PILOT'S DISCRETION MAINTAIN (altitude)."
  • "AMEND ALTITUDE."

Advantages of pilot's discretion:


  • Pilot can choose when to start climb or descent
  • Pilot may level off at intermediate altitude, but after vacating an altitude, cannot return to vacated altitude
  • Discretion clearance may conserve fuel for aircraft

Disadvantages of pilot's discretion:

  • Controller must protect more altitudes, which may interfere with sequencing and separation of traffic

Cruise clearance

Pilot is assigned altitude to cruise the airspace from ATC assigned altitude to minimum IFR altitude.

With a cruise clearance, pilot may climb, descend, or level off at any altitude within block, but ___.

once pilot reports leaving an altitude, they CANNOT return to that altitude

Vertical separation minima for nonparticipating aircraft from Special Use or ATC assigned airspace (FL290 and below)

At least 500 feet above/below altitude limits of airspace

Altitudes are assigned in ___ increments.

1,000 foot

Vertical separation minima for nonparticipating aircraft from Special Use or ATC assigned airspace (above FL290).

At least 1,000 feet above/below altitude limits of airspace