To request repetition of the second to fifth groups, C3 would  send: F5 DE C3 IMI 2 TO 5 K F5 would send: C3 DE F5 2  to  5-YAMXZ-HINLP-MMIAP-YSBOU  K To request repetition of the second and fourth to seventh groups, C3 would send: F5 DE C3 IMI 2-4 to 7 K F5 would send: C3 DE F5 2-YAMXZ-4 TO 7-MMIAP-YSBOU-QWJFD-LJGFX K In  plain  language  messages,  portions  of  the text are identified as words rather than numbered groups.  The  prosigns  WA  and  WB  are  used  as appropriate. VERIFICATIONS During   certain   conditions,   addressees   of   a message  may  wish  to  verify  with  the  originator either the entire message or a portion of it. This can be  done  with  the  use  of  a  service,  abbreviated service,  or  formal  message.  However,  only  the addressee  may  request  a  verification,  and  the  reply must  be  authorized  by  the  originator.  Operators  are not permitted to originate a request for a verification or reply thereto. In most cases, a message will be receipted for before the need for a verification becomes evident. In those cases where it is apparent, prior to receipting for a  message,  that  a  verification  will  be  required, verification may be requested at once instead of first receipting for the message. The  prosign  J  after  a  call  and  followed  by identification  data,  when  necessary,  means with the originator and repeat message or indicated.” Examples: Message: D3 DE A2 -R-211355Z MAR 96 “Verify portion -FM A2 -TO D3 -INFO W7 B T CHANGE COURSE WHEN READY. DO NOT CHANGE SPEED. BT K To request verification and repetition of the entire message, D3 would send: A2 DE D3 J 211355Z MAR 96 K A2 would verify the message with the originator and if correct as previously sent would repeat the entire message. To request verification and repetition of the heading, D3 would  send: A2 DE D3 J 211355Z MAR 96 AB BT K A2 would verify with the originator and then reply: D3 DE A2 C 211355Z MAR 96 AB BT D3 DE A2 -R-211355Z MAR 96 -FM A2 -TO D3 -INFO  W7 BT K EXECUTIVE METHOD The executive method is used when it is desired to execute a signal at a certain instant; for example, to ensure that two or more units take action at the same  moment.  Although  the  executive  method normally is associated with signals from a signal book,  it  may  be  used  when  appropriate  for  plain language. There are two types of executive methods: 1. Delayed executive method 2.  Immediate  executive  method Tactical signals may be sent by flashing light. When  the  OTC  uses  that  method,  however,  the 4-8