4/20/23 

AIM 

There is no U.S. requirement to file the aircraft Mode S Code in Item 18. 

6. SELCAL code (Item 18 SEL/) 

(a) 

Flights with HF radio and Selective Calling capability should include their 4

−

letter SELCAL code. Per 

the U.S. AIP, GEN 3.4, Paragraph 9, Selective Calling System (SELCAL) Facilities Available. 

(b) 

The SELCAL is a communication system that permits the selective calling of individual aircraft over 

radio

−

telephone channels from the ground station to properly equipped aircraft, to eliminate the need for the 

flight crew to constantly monitor the frequency in use. 

EXAMPLE

−

 

SEL/CLEF 

7. Performance Category (Item 18 PER/) 

Include the appropriate single

−

letter Aircraft Approach Category as defined in the Pilot/Controller Glossary. 

EXAMPLE

−

 

PER/A 

TBL 4

−

20 

Flight Routing Information 

Item 

International Flight Plan 

(FAA Form 7233

−

4) 

Domestic U.S. Requirements 

Equivalent Item on 

Domestic Flight Plan 

(FAA Form 7233

−

1) 

Departure Airport 

Item 13 

Required 

Item 2 

Departure Time 

Item 13 

Required 

Item 1 

Cruise Speed 

Item 15 

Required 

N/A 

Requested Altitude 

Item 15 

Required 

Item 3 

Route 

Item 15 

Required 

N/A 

Delay En Route 

Item 15, Item 18 DLE/ 

Required 

N/A 

Destination Airport 

Item 16 

Required 

Item 11 

Total Estimated Elapsed Time 

Item 16 

Required 

Item 

Alternate Airport 

Item 16 
Item 18 ALTN/ (Destination Alternate). 

RALT/ (En route Alternate); TALT/ 
(Take

−

off Alternate) 

If necessary 

No need to file for domestic U.S. flight 

N/A 

Estimated Elapsed Times 

Item 18 EET/ 

Include when filing flight plan with center 
other than departure center 

N/A 

f. Instructions for Flight Routing Items 

1. Departure Airport (Item 13, Item 18 DEP/) 

(a)

 Enter the departure airport. The airport should be identified using the four

−

letter location identifier from 

FAA Order JO 7350.9, Location Identifiers, or from ICAO Document 7910. FSS and FAA contracted flight plan 

filing services will allow up to 11 characters in the departure field. This will permit entry of non

−

ICAO identifier 

airports, and other fixes such as an intersection, fix/radial/distance, and latitude/longitude coordinates. Other 

electronic filing services may require a different format. 

NOTE

−

 

While user interfaces for flight plan filing are not specified, all flight plan filing services must adhere to the appropri-

ate Interface Control Document upon transmission of the flight plan to the control facility. 

(b)

 When the intended departure airport (Item 13) is outside of domestic U.S. airspace, or if using the paper 

version of FAA Form 7233

−

4, or DoD equivalent, if the chosen flight plan filing service does not allow 

FAA Form 7233

−

4 

−

 International Flight Plan 

Appendix 4

−

17