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AIM

10/12/17

5−1−12

Preflight

3. When filing an IFR flight plan, identify the

equipment capability by adding a suffix, preceded by

a slant, to the AIRCRAFT TYPE, as shown in

TBL 5−1−3, Aircraft Suffixes.

NOTE−

1. ATC issues clearances based on filed suffixes. Pilots

should determine the appropriate suffix based upon

desired services and/or routing. For example, if a desired

route/procedure requires GPS, a pilot should file /G even

if the aircraft also qualifies for other suffixes.

2. For procedures requiring GPS, if the navigation system
does not automatically alert the flight crew of a loss of GPS,
the operator must develop procedures to verify correct GPS
operation.

3. The suffix is not to be added to the aircraft identification
or be transmitted by radio as part of the aircraft

identification.

4. It is recommended that pilots file the

maximum transponder or navigation capability of

their aircraft in the equipment suffix. This will

provide ATC with the necessary information to utilize

all facets of navigational equipment and transponder

capabilities available.

5. When filing an IFR flight plan via telephone

or radio, it is highly recommended that the departure

airport be clearly identified by stating the city name

and state and/or airport location identifier.  With cell

phone use and flight service specialists covering

larger areas of the country, clearly identifying the

departure airport can prevent confusing your airport

of departure with those of identical or similar names

in other states.

TBL 5−1−3

Aircraft Equipment Suffixes

Navigation Capability

Transponder Capability

Suffix

RVSM

No GNSS, No RNAV

Transponder with Mode C

/W

RNAV, No GNSS

Transponder with Mode C

/Z

GNSS

Transponder with Mode C

/L

No RVSM

No DME

No Transponder

/X

Transponder with no Mode C

/T

Transponder with Mode C

/U

DME

No Transponder

/D

Transponder with no Mode C

/B

Transponder with Mode C

/A

TACAN

No Transponder

/M

Transponder with no Mode C

/N

Transponder with Mode C

/P

RNAV, no GNSS

No Transponder

/Y

Transponder with no Mode C

/C

Transponder with Mode C

/I

GNSS

No Transponder

/V

Transponder with no Mode C

/S

Transponder with Mode C

/G