Priority.–  Precedence prosign P is reserved for messages that furnish essential information for the conduct of operations in progress. Priority is the highest precedence  normally  authorized  for  administrative messages. Exceptions are messages reporting death, serious illness or serious injury which may be assigned administrative   precedence. Messages   assigned   the   priority   precedence normally  include  situation  reports  on  the  position  of  a front where an attack is impending, or where tire or air support will soon be placed; orders to aircraft formations or units to coincide with ground or naval operations; messages  concerning  immediate  movement  of  naval,  air or ground forces; weather observations with surface wind speeds 33 knots or less and all oceanographic observations. The speed of service objective is within three hours. Immediate.– Precedence prosign O is reserved for messages  relating  to  situations  that  gravely  affect  the national forces or populace and that require immediate delivery. Examples are as follows: amplifying reports of initial enemy contact; reports of unusual movements of military forces of foreign powers in time of peace or strained relations; attack orders to commit a force in reserve  without  delay;  reports  of  widespread  civil disturbance  and  requests  for  or  directions  concerning distress assistance. The speed of service objective is within 30 minutes. Flash– Precedence prosign Z is reserved for initial enemy contact reports or operational combat messages of   extreme   urgency.   Examples   are   initial   enemy contacts;  messages  recalling  or  diverting  friendly aircraft about to bomb targets unexpected y occupied by friendly  forces;  warnings  of  imminent  large-scale attacks;   extremely   urgent   intelligence   messages; messages  containing  major  strategic  decisions  of  great urgency and reports of tropical storms, typhoons or hurricanes believed to be previously undetected. The speed of service objective is as fast as possible with an objective of less than 10 minutes. Messages that have both action and information addressees may be assigned a single precedence, or they may  be  assigned  a  dual  precedence-a  higher  precedence for the action addressees and a lower one for all infor- mation addressees. It is important that the assignment of dual precedence be considered on all messages with information   addressees   when   other   than   routine precedence is assigned to the action addressee(s). Classification  Block This  block  consists  of  the  classification  abbre- viation repeated four times (UUUU, CCCC and SSSS). Originator  Message  Identification (ORIG MESSAGE IDENT) Block This block is used by the preparer to assign an identifying number to help in keeping track of messages within the command. It consists of a three-digit Julian date combined with the four-digit ZULU time that the message was typed. Message  Handling  Instruction  Block The word ADMIN is typed here if a message is determined to be administrative instead of operational in nature. From Line The originating short title of the command as listed in  the  Message  Address  Directory  (MAD),  USN PLAD-1,  is  typed  following  the  preprinted  FROM. To Line The short title of the intended recipient(s) of the message is listed here after the preprinted TO. List each addressee  directly  under  the  previous  one.  There  is  no limit to the number of addressees that can be listed. NOTE:  On  second  and  subsequent  pages,  the  words FROM and TO preprinted on the form are ignored and typed  over. Info  Line Commands being sent the message for information only  (no  action  required  on  their  part)  are  listed  here. The word INFO is typed on the form under TO in a position  that  allows  INFO  addressees  to  be  listed directly  under  the  TO  addressees. Classification and SSIC Line This line shows the classification followed by the Standard  Subject  Identification  Code  (SSIC)  of  the subject matter. The SSIC is set off with two slashes before and after, and the number is preceded by an N to denote that the message was originated in the Navy. Example: UNCLAS//N05720//. Specific instruction on 1-27