AIM

8/15/19

5

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1

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24

Preflight

alternate aerodromes; or, if no location identifier(s)
have been assigned;

(2)

Insert ZZZZ and specify the name of the

aerodrome in Item 18, following the characters
ALTN/.

EXAMPLE

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1.

KDFW0234  KPWA

2.

KBOS0304  ZZZZ

NOTE

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Although alternate airport information filed in an FPL will
be accepted by air traffic computer systems, it will not be
presented to controllers. If diversion to an alternate airport
becomes necessary, pilots are expected to notify ATC and
request an amended clearance.

8. Item 18. Other Information

(a)

Insert 0 (zero) if no other information; or,

any other necessary information in the sequence
shown below, in the form of the appropriate indicator
followed by an oblique stroke and the information to
be recorded:

NOTE

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1.

Operators are warned that the use of indicators not

included in the provisions may result in data being rejected,
processed incorrectly, or lost.

2.

Hyphens “-” or oblique strokes “/” should only be used

as described.

3.

Avoid use of any other special characters in Field 18

information- use only letters and numbers.

4.

An indicator without any associated information will

result in flight plan rejection.

(b)

STS/ Reason for special handling by ATS

as follows:

(1)

ALTRV: For a flight operated in

accordance with an altitude reservation.

(2)

ATFMX: For a flight approved for

exemption from ATFM measures by the appropriate
ATS authority.

(3)

FFR: Fire-fighting.

(4)

FLTCK: Flight check for calibration of

navaids.

(5)

HAZMAT: For a flight carrying haz-

ardous material.

(6)

HEAD: A flight with Head of State

status.

(7)

HOSP: For a medical flight declared by

medical authorities.

(8)

HUM: For a flight operating on a

humanitarian mission.

(9)

MARSA: For a flight for which a

military entity assumes responsibility for separation
of military aircraft.

(10)

MEDEVAC: For a life critical medical

emergency evacuation.

(11)

NONRVSM: For a non-RVSM capa-

ble flight intending to operate in RVSM airspace.

(12)

SAR: For a flight engaged in a search

and rescue mission.

(13)

STATE: For a flight engaged in

military, customs, or police services.

NOTE

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Other reasons for special handling by ATS are denoted
under the designator RMK/.

(c)

PBN/ Indication of RNAV and/or RNP

capabilities. Include as many of the descriptors below
as apply to the flight, up to a maximum of 8 entries;
that is a total of not more than 16 characters.

TBL 5

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1

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6

PBN/RNAV Specifications

PBN/

RNAV SPECIFICATIONS

A1

RNAV 10 (RNP 10)

B1

RNAV 5 all permitted sensors

B2

RNAV 5 GNSS

B3

RNAV 5 DME/DME

B4

RNAV 5 VOR/DME

B5

RNAV 5 INS or IRS

B6

RNAV 5 LORAN C

C1

RNAV 2 all permitted sensors

C2

RNAV 2 GNSS

C3

RNAV 2 DME/DME

C4

RNAV 2 DME/DME/IRU

D1

RNAV 1 all permitted sensors

D2

RNAV 1 GNSS

D3

RNAV 1 DME/DME

D4

RNAV 1 DME/DME/IRU