(i) C/ followed by the name of the pilot-in-command. 
Example: –E/0745  P/6  R/VE  S/M J/L  D/2 8  C YELLOW 
A/YELLOW RED TAIL N145E  C/SMITH 

Field Type 20 — Alerting Search and Rescue Information
FIELD TYPE 20

Format: –
(sp)

(sp) * (sp) (*EIGHT elements in all) This field consists of the following specified sequence of elements separated by spaces. Any information not available should be shown as “NIL” or “NOT KNOWN” and not simply omitted. SINGLE HYPHEN
Previous  Next type 
type of  This type  of field 
field or  of field  or 
symbol  is used in  symbol 
19  ALR  ) 

(a) Identity of Operator
The ICAO two-letter designator of the aircraft operating agency or, if this has not been assigned, the name of the operator.
(b) Unit which made Last Contact
6 LETTERS consisting of the 4-letter ICAO location indicator followed by the 2-letter designator which together identify the ATS unit which made the last two-way contact or, if these are not available, some other description of the unit.
(c) Time of Last Two-way Contact
4 NUMERICS giving the time of the last two-way contact.

(d) Frequency of Last Contact
NUMERICS as necessary giving the transmitting/receiving frequency of the last contact.
(e) Last Reported Position
The last reported position expressed in one of the data conventions of 1.6 of this Appendix followed by the time over that position.
Field Type 20 (cont.)
(f) Method of Determining Last Known Position Plain language text as necessary.
(g)
Action Taken by Reporting Unit Plain language text as necessary.

(h)
Other Pertinent Information Plain language text as necessary.

Example:  –USAF  LGGGZAZX  1022 126.7  GN 1022 PILOT  REPORT OVER NDB ATS UNITS ATHENS FIR ALERTED  NIL
Field Type 21 — Radio Failure Information
FIELD TYPE 21

Format: –
(sp)

(sp) * (sp) (*SIX elements in all) This field consists of the following specified sequence of elements preceded by a
Previous  Next type 
type of  This type  of field 
field or  of field  or 
symbol  is used in  symbol 
7  RCF  ) 

single hyphen and separated by spaces. Any information not available is to be shown as “NIL” or “NOT KNOWN” and not simply omitted.
SINGLE HYPHEN
(a) Time of Last Two-way Contact
4 NUMERICS giving the time of the last two-way contact with the aircraft.

(b) Frequency of Last Contact
NUMERICS as necessary giving the transmitting/receiving frequency of the last two-way contact with the aircraft.
(c) Last Reported Position
The last reported position expressed in one of the data conventions of 1.6 of this Appendix.
(d) Time at Last Reported Position
4 NUMERICS giving the time at the last reported position.

(e) Remaining COM Capability
LETTERS as necessary identifying the remaining COM capability of the aircraft, if known, using the convention of Field Type 10, or in plain language.
(f) Any Necessary Remarks Plain language text as necessary.
Example: –1232  121.3  CLA  1229  TRANSMITTING ONLY 126.7
LAST POSITION  CONFIRMED  BY RADAR

Field Type 22 — Amendment
FIELD TYPE 22
/ /

Format: –
a
b

SINGLE HYPHEN
(a) Field Indicator
Previous  Next type 
type of  This type  of field 
field or  of field  or 
symbol  is used in  symbol 
　
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