When  classified  material  is  sent  through  the registry system, it must be mailed in strict accordance with the Department of the Navy (DON) Information Security  Program  (ISP)  Regulation,  SECNAVINST 5510.36.     Let’s  discuss  the  two  classifications authorized to be transported by registered mail. SECRET SECRET  is  the  classification  level  applied  to information  whose  unauthorized  disclosure  could reasonably be expected to cause serious damage to the national  security.     Examples  include  information whose unauthorized release could result in disruption of foreign relations significantly affecting the national security; the disclosure of significant military plans or intelligence operations; and the disclosure of scientific or  technological  developments  relating  to  national security. The  following  information  lists  the  security requirements for mailing material classified SECRET:    USPS  registered  mail  within  and  between  the U.S. and its territories.    USPS  registered  mail  through  Army,  Navy, Marine  Corps,  or  Air  Force  postal  service facilities,  outside  the  area  of  the  U.S.  and  its territories, provided that the material does not at any time pass out of U.S. citizen control and does not pass through a foreign postal system.    USPS  and  Canadian  registered  mail  with registered  mail  return  receipt  between  U.S. Government   and   Canadian   government installations in the U. S. and Canada. CONFIDENTIAL CONFIDENTIAL   is   the   classification   level applied to information whose unauthorized disclosure could reasonably be expected to cause damage to the national  security. Examples  include  information whose unauthorized release could result in disclosure of ground, air, and naval forces (e.g., force levels and force  dispositions);  or  disclosure  of  performance characteristics,  such  as  design,  test,  and  production data of U.S. munitions and weapons systems. The  following  information  lists  the  security requirements   for   mailing   material   classified CONFIDENTIAL:    USPS First-Class Mail between DoD activities anywhere  in  the  U.  S.  and  its  territories.   The outer  wrapper  or  envelope  shall  be  endorsed “Return Service Requested.”    USPS certified mail for information addressed to a  cleared  DoD  contractor  facility  or  non-DoD agency.    USPS registered mail to and from FPO and APO addresses  located  outside  the  U.S.  and  its territories, and when the originator is uncertain that  the  addressee’s  location  is  within  U.S. boundaries. PURPOSE Learning  Objective: Recall  the  security provided for registered mail and the receipts that are used in the registered mail system. From the time a piece of registered mail is accepted until it is delivered to the addressee, someone is always personally  responsible  for  its  safety.    The  fact  that classified information up to and including SECRET is authorized  to  be  sent  by  official  registered  mail  is evidence of the confidence placed in registered mail. Military  postal  personnel  should  always  assume  that official registered mail contains classified material. To  provide  the  security  required  for  classified material, official and personal registered mail must be dispatched  only  on  scheduled  U.S.  commercial, passenger  nonstop  flights;  all-cargo  aircraft;  AMC aircraft; or surface transportation as directed.  Between oversees  locations  registered  mail  may  also  be dispatched on Navy military aircraft. The   JMPAs,   in   coordination   with   overseas commanders,  designate  which  flights  will  carry registered mail.   The designated flights are those that arrive  at  the  most  convenient  time  for  the  receiving locations,  as  they  must  be  met  by  assigned  U.S. military  personnel. Some  ports  overseas  have  no military postal facilities nearby.  When in these ports, and  there  is  no  U.S.  commercial,  passenger  nonstop flights; or all-cargo aircraft, then registered mail will be dispatched to your port of call on AMC aircraft. You may  also  receive  registered  mail  on  Navy  aircraft scheduled  in  advance  to  provide  logistics  support  to your port of call.  You will be given sufficient advance notice  of  incoming  AMC  or  Navy  military  aircraft. This  will  allow  you  to  meet  the  plane  and  accept delivery  of  mail  for  your  ship  and  any  other  ships 7-6