T-34C INSTRUMENT NAVIGATION WORKBOOK
LEAVING To depart an altitude/flight level at which you were level.
Concerning altitudes/flight levels, the term means to remain at the altitude/flight level
specified. The phrase "climb and" or "descend and" normally precedes "maintain" and the
altitude assignment; e.g., "descend and maintain 5000."
Concerning other ATC instructions, the term is used in its literal sense; e.g., maintain VFR.
MINIMUM FUEL - Indicates that an aircraft's fuel supply has reached a state where, upon
reaching the destination, it can accept little or no delay. This is not an emergency situation but
merely indicates that an emergency situation is possible should any undue delay occur.
MISSED APPROACH -
A maneuver conducted by an aircraft when an instrument approach cannot be completed to
a landing. The route of flight and altitude are shown on the Instrument Approach
Procedure Chart. An aircraft executing a missed approach prior to the Missed Approach
Point (MAP) must continue along the final approach to the MAP. The aircraft may climb
immediately to the altitude specified in the missed approach procedure.
A term used by the aircrew to inform ATC that a missed approach is being executed.
At locations where ATC radar service is provided, the aircrew should conform to radar
vectors, when provided by ATC, in lieu of the published missed approach procedure.
NEGATIVE - "No" or Permission not granted" or "That is not correct."
NEGATIVE NUMBERS - Used to indicate that the aircrew does not have the current weather
and landing information.
NO JOY - Used by the aircrew to indicate that they were unable to communicate with an ATC
facility on the assigned frequency.
NORDO - Non-radio-equipped aircraft Not to be used to designate aircraft which have radio
PASSING - Climbing or descending through an altitude/flight level.
PILOT'S DISCRETION - When used in conjunction with altitude assignments, this term
means that ATC has offered the aircrew the option of starting a climb or descent when desired
and conducting the climb or descent at any rate. However, once the altitude has been vacated,
the aircraft may not return to that altitude.
A-4 GLOSSARY OF COMMUNICATION TERMS