I am looking a for a thread on why my system coverage toolbox is missing. I have the arcinfo lincense level of ArcGIS 10.3 and am trying to project a coverage. Is there somewhere this is accessible but simply not installed?
You need to have ArcInfo Workstation installed in order to view Coverage Toolbox.
An overview of the Coverage toolbox
If you do not have ArcInfo Workstation installed, the Coverage toolbox will not appear in the list of available toolboxes.