PCG BACK-TAXI -- BROADCAST [ICAO]
BACK-TAXI -- BROADCAST [ICAO]
BACK-TAXI- A term used by air traffic controllers to taxi an
aircraft on the runway opposite to the traffic flow. The aircraft may be
instructed to back-taxi to the beginning of the runway or at some point
before reaching the runway end for the purpose of departure or to exit
BASE LEG- (See TRAFFIC PATTERN.)
BEACON- (See RADAR.)
(See NONDIRECTIONAL BEACON.)
(See AIRPORT ROTATING BEACON.)
BEARING- The horizontal direction to or from any point, usually measured
clockwise from true north, magnetic north, or some other reference point
through 360 degrees.
(See AERONAUTICAL BEACON.)
BELOW MINIMUMS- Weather conditions below the minimums prescribed by regulation
for the particular action involved; e.g., landing minimums, takeoff minimums.
(See NONDIRECTIONAL BEACON.)
BLAST FENCE- A barrier that is used to divert or dissipate jet or propeller
BLIND SPEED- The rate of departure or closing of a target relative to
the radar antenna at which cancellation of the primary radar target by
moving target indicator (MTI) circuits in the radar equipment causes a
reduction or complete loss of signal.
BLIND SPOT- An area from which radio transmissions and/or radar echoes
cannot be received. The term is also used to describe portions of the airport
not visible from the control tower.
(See ICAO term BLIND VELOCITY.)
BLIND TRANSMISSION- (See TRANSMITTING IN THE BLIND.)
BLIND VELOCITY [ICAO]- The radial velocity of a moving target such that
the target is not seen on primary radars fitted with certain forms of fixed
BLIND ZONE- (See BLIND SPOT.)
BLOCKED- Phraseology used to indicate that a radio transmission
has been distorted or interrupted due to multiple simultaneous radio transmissions.
BOUNDARY LIGHTS- (See AIRPORT LIGHTING.)
BRAKING ACTION (GOOD, FAIR, POOR, OR NIL)- A report of
conditions on the airport movement area providing a pilot with a degree/quality
of braking that he might expect. Braking action is reported in terms of
good, fair, poor, or nil.
BRAKING ACTION ADVISORIES- When tower controllers have received runway
braking action reports which include the terms "poor" or "nil," or whenever
weather conditions are conducive to deteriorating or rapidly changing runway
braking conditions, the tower will include on the ATIS broadcast the statement,
"BRAKING ACTION ADVISORIES ARE IN EFFECT." During the time Braking Action
Advisories are in effect, ATC will issue the latest braking action report
for the runway in use to each arriving and departing aircraft. Pilots should
be prepared for deteriorating braking conditions and should request current
runway condition information if not volunteered by controllers. Pilots
should also be prepared to provide a descriptive runway condition report
to controllers after landing.
(See RUNWAY CONDITION READING.)
BREAKOUT- A technique to direct aircraft out of the approach stream.
In the context of close parallel operations, a breakout is used to direct
threatened aircraft away from a deviating aircraft.
BROADCAST- Transmission of information for which an acknowledgement
is not expected.
BROADCAST [ICAO]- A transmission of information relating to air navigation
that is not addressed to a specific station or stations.
(See ICAO term BROADCAST.)