Pilot/Controller Glossary
4/3/14
PCG I−1
I
I SAY AGAIN
− The message will be repeated.
IAF−
(See INITIAL APPROACH FIX.)
IAP−
(See INSTRUMENT APPROACH
PROCEDURE.)
IAWP− Initial Approach Waypoint
ICAO−
(See ICAO Term INTERNATIONAL CIVIL
AVIATION ORGANIZATION.)
ICING− The accumulation of airframe ice.
Types of icing are:
a.
Rime Ice− Rough, milky, opaque ice formed by
the instantaneous freezing of small supercooled
water droplets.
b.
Clear Ice− A glossy, clear, or translucent ice
formed by the relatively slow freezing or large
supercooled water droplets.
c.
Mixed− A mixture of clear ice and rime ice.
Intensity of icing:
a.
Trace− Ice becomes perceptible. Rate of
accumulation is slightly greater than the rate of
sublimation. Deicing/anti-icing equipment is not
utilized unless encountered for an extended period of
time (over 1 hour).
b.
Light− The rate of accumulation may create a
problem if flight is prolonged in this environment
(over 1 hour). Occasional use of deicing/anti-icing
equipment removes/prevents accumulation. It does
not present a problem if the deicing/anti-icing
equipment is used.
c.
Moderate− The rate of accumulation is such that
even short encounters become potentially hazardous
and use of deicing/anti-icing equipment or flight
diversion is necessary.
d.
Severe− The rate of accumulation is such that
deicing/anti-icing equipment fails to reduce or
control the hazard. Immediate flight diversion is
necessary.
IDENT
− A request for a pilot to activate the aircraft
transponder identification feature. This will help the
controller to confirm an aircraft identity or to identify
an aircraft.
(Refer to AIM.)
IDENT FEATURE− The special feature in the Air
Traffic Control Radar Beacon System (ATCRBS)
equipment. It is used to immediately distinguish one
displayed beacon target from other beacon targets.
(See IDENT.)
IF−
(See INTERMEDIATE FIX.)
IFIM−
(See INTERNATIONAL FLIGHT INFORMATION
MANUAL.)
IF NO TRANSMISSION RECEIVED FOR
(TIME)
− Used by ATC in radar approaches to prefix
procedures which should be followed by the pilot in
event of lost communications.
(See LOST COMMUNICATIONS.)
IFR−
(See INSTRUMENT FLIGHT RULES.)
IFR AIRCRAFT− An aircraft conducting flight in
accordance with instrument flight rules.
IFR CONDITIONS− Weather conditions below the
minimum for flight under visual flight rules.
(See INSTRUMENT METEOROLOGICAL
CONDITIONS.)
IFR DEPARTURE PROCEDURE−
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)
(Refer to AIM.)
IFR FLIGHT−
(See IFR AIRCRAFT.)
IFR LANDING MINIMUMS−
(See LANDING MINIMUMS.)
IFR MILITARY TRAINING ROUTES (IR)− Routes
used by the Department of Defense and associated
Reserve and Air Guard units for the purpose of
conducting low-altitude navigation and tactical
training in both IFR and VFR weather conditions
below 10,000 feet MSL at airspeeds in excess of 250
knots IAS.
IFR TAKEOFF MINIMUMS AND DEPARTURE
PROCEDURES− Title 14 Code of Federal