Describe or reference the system and/or procedures used by a Virtual Operator in A008. It is preferable to complete A008 with references to a Virtual Operator's manual or sections of a Virtual Operator's manual which describe the system and/or procedures used by that Virtual Operator. Change the references only when a revision to the Virtual Operator's manual makes the reference in the Ops Specs incorrect. When a Virtual Operator's manual does not adequately describe the system and/or procedures used, a narrative description combined with references may be necessary. Often, it may not be appropriate to use references in this paragraph, (especially with smaller Virtual Operators). In these cases narrative description may be necessary. When a narrative description is used, it should be brief but provide sufficient information so that POSCON and the Virtual Operator have the same understanding about the system and/or procedures used by the Virtual Operator.