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Radar Contact Glossary
Version 4 December 2, 2007
Copyright JDT LLC 2005 Page 285
PILOT BRIEFING- A service provided by the FSS to assist pilots in flight planning.
Briefing items may include weather information, NOTAMs, military activities, flow control
information, and other items as requested.
PILOT'S DISCRETION- When used in conjunction with altitude assignments, means that
ATC has offered the pilot the option of starting climb or descent whenever he/she wishes and
conducting the climb or descent at any rate he/she wishes. He/she may temporarily level off
at any intermediate altitude. However, once he/she has vacated an altitude, he/she may not
return to that altitude.
PRECISION APPROACH PROCEDURE- A standard instrument approach procedure in
which an electronic glide slope/glide path is provided; e.g., ILS, MLS, and PAR.
Radar Contact - Used by ATC to inform an aircraft that it is identified on the radar
display and radar flight following will be provided until radar identification is
terminated. Radar service may also be provided within the limits of necessity and
capability. When a pilot is informed of "radar contact," he/she automatically
discontinues reporting over compulsory reporting points.
RADAR SERVICE TERMINATED- Used by ATC to inform a pilot that he/she will no
longer be provided any of the services that could be received while in radar contact. Radar
service is automatically terminated, and the pilot is not advised in the following cases:
a. An aircraft cancels its IFR flight plan, except within Class B airspace, Class C
airspace, a TRSA, or where Basic Radar service is provided.
b. An aircraft conducting an instrument, visual, or contact approach has landed or has
been instructed to change to advisory frequency.
c. An arriving VFR aircraft, receiving radar service to a tower-controlled airport within
Class B airspace, Class C airspace, a TRSA, or where sequencing service is provided,
has landed; or to all other airports, is instructed to change to tower or advisory
frequency.
d. An aircraft completes a radar approach.
READ BACK- Repeat my message back to me.
RESUME OWN NAVIGATION- Used by ATC to advise a pilot to resume his/her own
navigational responsibility. It is issued after completion of a radar vector or when radar
contact is lost while the aircraft is being radar vectored.
Radar Contact - RC issues no specific instructions, whether to proceed direct a fix or
fly a heading to re-join. When told to “…resume own navigation…”, RC users should
proceed to their next checkpoint, direct.
ROGER- I have received all of your last transmission. It should not be used to answer a
question requiring a yes or a no answer.
RUNWAY HEADING- The magnetic direction that corresponds with the runway centerline
extended, not the painted runway number. When cleared to "fly or maintain runway
heading," pilots are expected to fly or maintain the heading that corresponds with the
Radar Contact Glossary
Version 4 December 2, 2007
Copyright JDT LLC 2005 Page 286
extended centerline of the departure runway. Drift correction shall not be applied; e.g.,
Runway 4, actual magnetic heading of the runway centerline 044, fly 044.
SAY AGAIN- Used to request a repeat of the last transmission. Usually specifies
transmission or portion thereof not understood or received; e.g., "Say again all after ABRAM
VOR."
SIMPLIFIED DIRECTIONAL FACILITY- A NAVAID used for non-precision instrument
approaches. The final approach course is similar to that of an ILS localizer except that the
SDF course may be offset from the runway, generally not more than 3 degrees, and the course
may be wider than the localizer, resulting in a lower degree of accuracy.
SQUAWK (Mode, Code, Function)- Activate specific modes/codes/functions on the aircraft
transponder; e.g., "Squawk three/alpha, two one zero five, low."
STANDARD TERMINAL ARRIVAL- A preplanned instrument flight rule (IFR) air traffic
control arrival procedure published for pilot use in graphic and/or textual form. STARs
provide transition from the enroute structure to an outer fix or an instrument approach
fix/arrival waypoint in the terminal area.
STAND BY- Means the controller or pilot must pause for a few seconds, usually to attend to
other duties of a higher priority. Also means to wait as in "stand by for clearance." The caller
should reestablish contact if a delay is lengthy. "Stand by" is not an approval or denial.
TACTICAL AIR NAVIGATION- An ultra-high frequency electronic rho-theta air
navigation aid which provides suitably equipped aircraft a continuous indication of bearing
　
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