: Approach minimums occur when the aircraft has reached the minimum altitude to land. At this point, the pilot must make the decision to land on the runway or go around and re-approach for landing. ARGUS: ARGUS refers to both ARGUS International and its rating system, of the same name, for aircraft operators. As a specialized aviation services company, ARGUS provides ratings, reports, and other data to help people make informed decisions about who they fly with for charter.