3. Numerical Values
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Statutory Documents - IMO Publications and Documents - International Codes - DSC Code - Code of Safety for Dynamically Supported Craft – Resolution A.373(X) - Annex II - Use of Probability Concept - 3. Numerical Values

3. Numerical Values

 Where numerical probabilities are used in assessing compliance with requirements using the terms similar to those given above, the following approximate values may be used as guidelines to assist in providing a common point of reference. The probabilities quoted should be on an hourly or per journey basis depending on which is more appropriate to the assessment in question:

  Frequent Greater than 10-3 to 10-4
  Reasonably Probable: Less than frequent but more than 10-5
  Remote: 10-5 to 10-7
  Extremely Remote: 10-7 or less
  Extremely Improbable: Whilst no approximate numerical probability is given for this, the figures used should be substantially less than 10-7.

Note Different occurrences may have different acceptable probabilities according to the severity of their consequences.

Parent topic: Annex II - Use of Probability Concept
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