cease   transmissions   immediately.   Silence   must   be “FLASH,  FLASH,  FLASH,  POLK,  THIS  IS  Key, FLASH,  OVER.” .  .  .  .  ” You  should  be  aware  that  the  break-in  procedure  is not  to  be  used  during  the  transmission  of  a  tactical message  except  to  report  an  enemy  contact.  The precedence  of  the  message  spoken  three  times  means  to maintained until the station breaking in has passed the message.   In   the   following   example,   assume   that Tecumseh  is transmitting a message to  Kamehameha  on a free net and Key has a FLASH message for Polk. Key breaks in with the following transmission: Polk replies: “THIS IS Polk, ROGER, OVER.” Key then proceeds with the FLASH traffic and obtains a proper   ROGER,   thus   freeing   the   net   for   further transmissions. After hearing “ROGER,”  Kamehameha recontacts  Tecumseh for the remainder of the traffic that was being sent before the break-in: “Tecumseh, THIS IS Kamehameha, ALL AFTER On a directed net, the station wishing to break in would first obtain permission from net control. For example, referring  to  figure  2-1,  assume  that  Vallejo   is transmitting a message to  Kamehameha  and Polk has FLASH  traffic  for  Tecumseh.  Polk  notifies  Key  (net control): FLASH For Tecumseh, OVER.” Key then answers: “Polk, THIS IS Key, Send Your FLASH, OVER.” Upon hearing the authorization, Tecumseh transmits: “THIS IS Tecumseh, OVER.” Polk proceeds: “Tecumseh,   THIS   IS   Polk,   FLASH   (sends message),  OVER.” The  preceding  transmission  would  conclude  after Polk  had  received  a  proper  ROGER  for  the  FLASH traffic. The two stations that were broken (Vallejo and Kamehameha)   would   reestablish   communications using proper R/T procedures. EMERGENCY  SILENCE Emergency silence may be imposed on an R/T net only   by   competent   authority.   If   an   authentication system is in effect, a station must always authenticate a transmission   that: Imposes emergency silence; Lifts emergency silence; and Calls   stations   during   periods   of   emergency silence.  When  emergency  silence  is  imposed,  no receipt   or   answer   for   such   transmissions   is required. To impose emergency silence, the NECOS speaks the proword SILENCE three times. For example, refer to  figure  2-1  and  assume  that  Key  (net  control)  was authorized  to  impose  emergency  silence.  Key would transmit: “Poseidon,  THIS  IS  Key,  SILENCE,  SILENCE, SILENCE, TIME One Four Four Zero Zulu, OUT.” To   impose   emergency   silence   on   a   particular frequency but not on all frequencies used in the net,  Key would  use  the  proword  SILENCE  (spoken  three  times), followed  by  a  frequency  or  the  frequency  designator  to be silenced. SILENCE (spoken three times), followed immediately  on  all  nets.  All  transmissions  end  with  the proword  OUT. To  lift  emergency  silence,   Key  would  send  the following   transmission: “Poseidon,   THIS   IS   Key,   SILENCE   LIFTED, TIME One Five One Zero Zulu, OUT.” EXECUTIVE  METHOD  FOR RADIOTELEPHONE by the words “all nets,”means to cease transmissions “FLASH,  FLASH,  FLASH,  Key,  THIS  IS  Polk.” maneuvers. Abbreviated plaindress format is normally The Executive Method for R/T is used to execute a tactical message at a given instant. This method is used to  ensure  that  two  or  more  units  make  simultaneous used for Executive Method messages. These messages never  have  a  time  group  included  in  the  message ending.   There   are   two   variations   of   the   Executive Method:  delayed  and  immediate. DELAYED  EXECUTIVE  METHOD A tactical message sent by the Delayed Executive Method must carry the warning proword EXECUTIVE TO FOLLOW in the message instructions immediately preceding the text. The executive signal is sent later in the  form  of  “standby—EXECUTE,”  the  latter  word being the instant of execution. For example, referring to 2-21