A present novel and non-trivial system, module, and method for generating final approach, missed approach, and departure data for use in an avionics system. A processor receives navigation data and object data, where object data includes terrain data and/or obstacle data. A flight path is defined, an obstacle clearance surface is constructed and examined for object penetration, and procedure data is generated and provided to at least one avionics system. For approach procedures, a decision altitude data is determined from which the procedure data is generated. A penetrated obstacle clearance surface is allowable if a remedy exists to address the penetration. Remedies may include the use of minimum obstacle clearance criteria, an iterative process, a path construction function, an existing departure procedure, and the use of input factors to determine a real-time estimated climb performance which could affect the climb gradient of a missed approach path.