message are specific blocks of information known as sets. Each set begins with the set identifier, followed by a field marker (/). Double slants (//) are used as end-of- set markers. Each set contains only certain information as specified by NTP 3. Some sets are mandatory while others are not. We will discuss the use of each MTF set shortly. Nearly all messages are formatted by USMTF procedures.  The  most  common  type  of  USMTF message is a General Administrative message, which follows   a   GENADMIN   format.   Other   USMTF message types include special purpose messages such as CASREP (casualty reports), LOGREQ (logistic requirements),  and  SORTS  (maritime  ship  reports). Other formatted messages are currently in use by Navy and Marine Corps units, and do not follow the USMTF guidelines,  such  as  the  remaining  RAINFORM formatted  messages,  and  Movement  Reports transmitted by Navy units are discussed in NWP 1-03.1, Operational  Reports.  Instructions  for  completing USMTF  formatted  messages  and  free  form  messages are  outlined  in  the  Telecommunications  Users  Manual, NTP 3. USMTF messages, free form messages, and other formatted messages all contain a message header and a message  body  that  contains  the  text  or  information. Figure 1-12 is an example of an USMTF GENADMIN message. Message  Header AUTODIN  message  headers  contain  several elements that must be included in each header, as well as some elements that are only required on a case-by- case   basis.   The   specific   format   of   a   message transmission heading and the routing indicator lines is discussed in JANAP 128, Automatic Digital Network (MOVREPS). The different types of reports routinely (AUTODIN)   Operating   Instructions. FORMAT  SECTION EXAMPLE ITEM HEADER PTTCZYUW   RULYNMU5678   2391235-CCCC-RULYSUU.  Transmission  ID ZNY  CCCCC Classification P 271020Z AUG 98 Precedence & DTG FM  NAVLANTMETOCCEN  NORFOLK  VA//N30// Originator TO USS SHIP//JJJ// Addressee INFO  CINCLANTFLT  NORFOLK  VA//N5// Info  Addee BT Text  separator BODY OF A C O N F I D E N T I A L //N03145// USMTF  GENADMIN  OPER/codename// Operation MESSAGE MSGID/GENADMIN/NAVLANTMETOCCEN/1215/JUL// Message  ID SUBJ/AVWX  (U)// Subject REF/A/DOC/NAVMETOCCOM/SEP    96// Reference REF/B/GENADMIN/USS  SHIP/270103Z  AUG  98// Reference NARR/REF  A  PROVIDES  PRODUCT  DESCRIPTION  AND  Narrative REF B REQUESTS PRODUCT BE PROVIDED.// POC/rank  and  name/command/telephone  number// Point of contact AKNLDG/acknowledge  instructions// Acknowledgements RMK/1.(U) METEOROLOGICAL SITUATION AT 271200Z:   Remarks-the   actual STRONG HIGH PRESSURE CENTERED OVER TRANSIT text of the message. AREA. 2.  (C)  24HR  FORECAST  FOR  PERIOD  271200Z  TO  281200Z ALONG TRACK FM 35 00N 075 00W TO 31 00N 070 00W . A. SKY, WEATHER: CLEAR. B. VSBY (NM): UNRSTD. (and so forth. . . ) DECL/30JAN99// Declassification (CLASSIFIED FOR ILLUSTRATIVE PURPOSES ONLY) Figure 1-12.—Example of a USMTF GENADMIN message. 1-21