leading  to  compromise.  Those  responsible  for security violations may be reevaluated to deter- mine if they should remain eligible for access to classified  information. If you find assigned personnel have left unattended and unlocked a container in which classified material is stored, report the incident immediately to the senior duty officer. The container  will  be  guarded  until  the  duty officer arrives at the location of the unlocked container.  The  duty  officer  will  then  inspect the classified material involved, lock the con- tainer,  and  make  a  security  violation  report to the commanding officer. If a possibility of  compromise  exists,  the  person  responsible for the container is required to return to the ship or station to make a complete inventory of its contents. When  you  receive  classified  material  that shows improper handling, but no compromise has occurred, promptly notify the commanding officer of the sending activity. Improper handling of classified material, such as improper mailing, shipping,  wrapping,  addressing,  packaging,  or transmitting, can result in security discrepancies. The following are other security discrepancies that can result from improper handling: Sending classified information in single containers Failing  to  enclose  a  return  receipt  for Secret material Sending Confidential information by First Class instead of Registered mail to FPO/ APO addresses Failing to mark the classification on the inner container Report such violations on a Security Discrepancy Notice,  OPNAV  Form  5511/51  (fig.  9-3). Classified material that enters a foreign postal system because of improper addressing or other mishandling is considered to have been compromised.  Similarly,  when  containers  of classified information are damaged in shipment to the extent that the contents are exposed, the possibility of compromise again exists. Both of these two situations require a preliminary inquiry and a JAG Manual investigation. COUNTERINTELLIGENCE  MATTERS TO BE REPORTED TO THE NAVAL INVESTIGATIVE SERVICE Certain matters affecting national security must be reported to the NIS so that appropriate counterintelligence action can be taken. All Department of the Navy employees, military and civilian, should report to their commanding officers or to the nearest command any suspicious activities. Suspicious activities include possible acts of sabotage, espionage, or compromise or contact  with  citizens  of  hostile  countries. Personnel should report such activities if they involve themselves, their dependents, or others, whether or not they have access to classified information. Commanding officers should, in turn, notify the nearest Naval Investigative Service office immediately. Sabotage, Espionage, or Deliberate Compromise Report all available information about possible acts of sabotage, espionage, deliberate com- promise, or other subversive activities to your commanding officer. If you are away from your command,  report  such  activities  to  the  most readily available command. Your commanding officer or the command to which you report the activity  will,  in  turn,  notify  the  nearest  NIS office. If you cannot immediately contact NIS when sabotage, espionage, or a person’s immediate flight or defection threatens security, notify COM- NAVSECINVCOM  by  classified  IMMEDIATE message. List the CNO as an information addressee. Notify the servicing NIS office immediately of any requests, through other than official channels, for classified defense information, Report anyone who makes such requests, regard- less of nationality. Report any requests for information from any person believed to be in contact with a foreign intelligence service. Also report requests for information such as the f o l l o w i n g : Names,  duties,  personal  data,  and characterizations  of  Department  of  the Navy personnel Technical  orders,  manuals,  regulations, base directories, personnel rosters; and unit manning tables The designation, strength, mission, combat posture, and development of ships, aircraft, and weapons systems 9-13