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6/17/21 

Pilot/Controller Glossary 

FORMATION FLIGHT

 More than one aircraft 

which, by prior arrangement between the pilots, 
operate as a single aircraft with regard to navigation 
and position reporting. Separation between aircraft 
within the formation is the responsibility of the flight 
leader and the pilots of the other aircraft in the flight. 
This includes transition periods when aircraft within 
the formation are maneuvering to attain separation 
from each other to effect individual control and 
during join-up and breakaway. 

a. 

A standard formation is one in which a 

proximity of no more than 1 mile laterally or 
longitudinally and within 100 feet vertically from the 
flight leader is maintained by each wingman. 

b. 

Nonstandard formations are those operating 

under any of the following conditions: 

1. 

When the flight leader has requested and ATC 

has approved other than standard formation 
dimensions. 

2. 

When operating within an authorized altitude 

reservation (ALTRV) or under the provisions of a 
letter of agreement. 

3. 

When the operations are conducted in 

airspace specifically designed for a special activity. 

(See ALTITUDE RESERVATION.) 
(Refer to 14 CFR Part 91.) 

FRC

 

(See REQUEST FULL ROUTE CLEARANCE.) 

FREEZE/FROZEN

  Terms used in referring to 

arrivals which have been assigned ACLTs and to the 
lists in which they are displayed. 

FREEZE CALCULATED LANDING TIME

 A 

dynamic parameter number of minutes prior to the 
meter fix calculated time of arrival for each aircraft 
when the TCLT is frozen and becomes an ACLT (i.e., 
the VTA is updated and consequently the TCLT is 
modified as appropriate until FCLT minutes prior to 
meter fix calculated time of arrival, at which time 
updating is suspended and an ACLT and a frozen 
meter fix crossing time (MFT) is assigned). 

FREEZE HORIZON

 The time or point at which an 

aircraft’s STA becomes fixed and no longer fluctuates 
with each radar update. This setting ensures a 
constant time for each aircraft, necessary for the 
metering controller to plan his/her delay technique. 
This setting can be either in distance from the meter 
fix or a prescribed flying time to the meter fix. 

FREEZE SPEED PARAMETER

 A speed adapted 

for each aircraft to determine fast and slow aircraft. 
Fast aircraft freeze on parameter FCLT and slow 
aircraft freeze on parameter MLDI. 

FRICTION MEASUREMENT

 A measurement of 

the friction characteristics of the runway pavement 
surface using continuous self-watering friction 
measurement equipment in accordance with the 
specifications, procedures and schedules contained 
in AC 150/5320

12, Measurement,  Construction, 

and Maintenance of Skid Resistant Airport Pavement 
Surfaces. 

FSDO

 

(See FLIGHT STANDARDS DISTRICT OFFICE.) 

FSPD

 

(See FREEZE SPEED PARAMETER.) 

FSS

 

(See FLIGHT SERVICE STATION.) 

FUEL DUMPING

 Airborne release of usable fuel. 

This does not include the dropping of fuel tanks. 

(See JETTISONING OF EXTERNAL STORES.) 

FUEL REMAINING

 A phrase used by either pilots 

or controllers when relating to the fuel remaining on 
board until actual fuel exhaustion. When transmitting 
such information in response to either a controller 
question or pilot initiated cautionary advisory to air 
traffic control, pilots will state the APPROXIMATE 
NUMBER OF MINUTES the flight can continue 
with the fuel remaining. All reserve fuel SHOULD 
BE INCLUDED in the time stated, as should an 
allowance for established fuel gauge system error. 

FUEL SIPHONING

 Unintentional release of fuel 

caused by overflow, puncture, loose cap, etc. 

FUEL VENTING

 

(See FUEL SIPHONING.) 

FUSED TARGET-

(See DIGITAL TARGET) 

FUSION [STARS]- the combination of all available 
surveillance sources (airport surveillance radar 
[ASR], air route surveillance radar [ARSR], ADS-B, 
etc.) into the display of a single tracked target for air 
traffic control separation services. FUSION is the 
equivalent of the current single-sensor radar display. 
FUSION performance is characteristic of a 
single-sensor radar display system. Terminal areas 
use mono-pulse secondary surveillance radar (ASR 
9, Mode S or ASR 11, MSSR). 

PCG F