The Admiralty Scale (also called the NATO System) is used to rank the reliability of a source and the credibility of an information.
+The Admiralty Scale or Ranking (also called the NATO System) is used to rank the reliability of a source and the credibility of an information. Reference based on FM 2-22.3 (FM 34-52) HUMAN INTELLIGENCE COLLECTOR OPERATIONS and NATO documents.
No doubt of authenticity, trustworthiness, or competency; has a history of complete reliability
+Associated numerical value="100"
Minor doubt about authenticity, trustworthiness, or competency; has a history of valid information most of the time
+ +Associated numerical value="75"
Doubt of authenticity, trustworthiness, or competency but has provided valid information in the past
+ +Associated numerical value="50"
Significant doubt about authenticity, trustworthiness, or co mpetency but has provided valid information in the past
+ +Associated numerical value="25"
Unreliable
+Lacking in authenticity, trustworthiness, and competency; history of invalid information
+Reliability cannot be judged
No basis exists for evaluating the reliability of the source
+Associated numerical value="50"
+Deliberatly deceptive
+Confirmed by other independent sources; logical in itself; Consistent with other information on the subject
+Associated numerical value="100"
Not confirmed; logical in itself; consistent with other information on the subject
+ +Associated numerical value="75"
Not confirmed; reasonably logical in itself; agrees with some other information on the subject
+ +Associated numerical value="50"
Not confirmed; possible but not logical ; no other information on the subject
+ +Associated numerical value="25"
Improbable
+Not confirmed; not logical in itself; contradicted by other information on the subject
+Truth cannot be judged
No basis exists for evaluating the validity of the information
+Associated numerical value="50"
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+100
+