Signalman 1 & C - Historic Naval Ships Association

such as “This page is unclassified” or “This page isConfidential” is used.When a change is being issued to an existingclassified publication, the changed pages will bemarked as if they were already entered into the basicpublication. If any of the changes is on an interiorpage, it will be marked in the same way as the interiorpages of the basic publication.Portion MarkingsEach section, part, paragraph, or subparagraph ofa classified document will be marked to show its levelof classification or the fact that it is unclassified. Thereason for this requirement is to eliminate any doubtas to which portion of the document contains, or canreveal, information requiring protection. Theappropriate symbol will be placed immediatelyfollowing a portion letter or number, or in the absenceof letters or numbers, immediately before thebeginning of the portion. The symbols are as follows:Top Secret (TS)Secret (S)Confidential (C)For Official Use Only (FOUO)Unclassified (U)In addition to the classification symbols, thefollowing symbols may also be used:Restricted Data (S-RD)Formerly Restricted Data (S-FRD)Critical Nuclear Weapons Design Information(S-RD) (N)When a major numbered or lettered paragraph andall of its subparagraphs are unclassified, eachparagraph need not be marked. Marking the lead-inparagraph with a (U) is sufficient.The full classification—not the abbreviatedform—is marked on figures, tables, graphs, charts,and so forth. The classification marking must becentered just below the illustration. Special situationsmay dictate the placement of the markings above oractually within the general area of the illustration. Theimportant point is that the reader understand theclassification level of that illustration.COMPROMISES AND SECURITYVIOLATIONSLEARNING OBJECTIVES: Define compromisesand security violations. List some of thereasons that lead to compromises and securityviolations.There are two types of security violations: Thosethat result in a confirmed compromise or possiblecompromise of classified information, and those that donot but in which a security regulation has been violated.Compromise is the disclosure of classifiedinformation to a person who is not authorized access.The unauthorized disclosure may have occurredknowingly, willfully, or through negligence.The compromise of classified informationpresents a threat to national security. The seriousnessof the threat must be determined and action taken toreduce the effects of compromise. At the same time,action must be taken to investigate the circumstancesand determine the causes, to prevent recurrence.Compromise of classified material results when asecurity violation has resulted in confirmed orsuspected exposure of classified information ormaterial to an unauthorized person. The compromiseis considered “confirmed” when conclusive evidenceexists that classified material was compromised; it isconsidered “suspected” when some evidence existsthat classified material has been subjected tocompromise.Any individual in the DON who is aware of thecompromise or possible compromise of classifiedmaterial must report the facts immediately to the mostreadily available command.Individuals who are aware of possible acts ofsabotage, espionage, deliberate compromise, or othersubversive activities must report immediately allavailable information to the most readily availablecommand, which, in turn, will notify the appropriateNaval Investigative Service office.SECURITY CLEARANCESLEARNING OBJECTIVES: Explain thepurpose of security clearances. List and explainthe types of BI done on an individual requiringa security clearance.11-4