Example: M15B   transmits: Alfa  One  Six  Two—THIS  IS  Mike  One  Five Bravo—OVER Al62  answers: Mike One Five Bravo—THIS IS Alfa One Six Two—OVER M15B having nothing for A162, transmits: Alfa  One  Six  Two—THIS  IS  Mike  One  Five Bravo—OUT Establishing a Net Full  call  signs  are  used  when  opening  a  net, reopening  a  net,  or  reporting  into  a  previously established  net.  Proper  control  by  the  NCS  and adherence to operating rules by all stations within the net enable the net to begin and maintain an exchange of  traffic  with  minimum  delay.  The  NCS  is  also responsible  for  maintaining  security  on  its  net. Appropriate security guidance will be furnished by the NCS to all stations prior to establishing a net. Example: When ready to establish a net, the NCS transmits: Yankee One Six Charlie—THIS IS Mike One Five Bravo—OVER Each  subordinate  station  then  answers  the  call  in alphabetical  order: Mike One Five Bravo—THIS IS Alfa One Six Two—OVER Mike One Five Bravo—THIS IS Bravo One Nine Eight—OVER Mike One Five Bravo—THIS IS Delta Two Three Four—OVER Once the net has been established, it will normally work with abbreviated procedures and call signs. The NCS will, however, order the net to work full or with abbreviated  procedures  or  call  signs,  as  required  by the conditions. MESSAGES A l t h o u g h    R / T    u s e s    t h r e e    m e s s a g e forms—plaindress,    abbreviated    plaindress,    and codress—the  form  most  used  is  the  abbreviated plaindress. However, the three parts are still used (heading,  text,  ending). The  procedures  for  use  of  the  above  mentioned messages are the same as for the use of the visual message. Plaindress A   plaindress   message   is   one   in   which   the originator and addressee designators are indicated externally of the text. It contains all components of the basic message format (unless the call serves as the address) and must always include the precedence and date-time group. The group count will always be included when the accounting symbol is used. Abbreviated Plaindress Operational  requirements  for  speed  and  handling may require abbreviations of plaindress headings. In such cases, any or all of the following may be omitted: Precedence Date Date-time  group Groupcount Codress A codress message is one in which the entire address is encrypted within the text. The heading contains   only   information   necessary   to   enable communications personnel to handle it properly. Service Messages Service and abbreviated service messages are messages  used  between  communications  personnel and   pertain   to   any   phase   of   traffic   handling, communication  facilities,  or  circuit  conditions.  See chapter 3 for more information concerning service messages. GENERAL OPERATING PROCEDURES The  procedures  for  conducting  radio  checks, repetitions,   cancellations,   corrections,   and verifications are contained in ACP 125; take time to study  these  procedures. 4-21