What are the compulsory reporting points for IFR planning when using VOR/DME or VORTAC fixes?

In the context of IFR planning using VOR/DME or VORTAC fixes, the compulsory reporting points are those specific geographical locations that are intentionally selected to define the route of flight. These points are vital for ensuring that the aircraft adheres to the designated air traffic control routing and maintains situational awareness.

When navigating under IFR, aircraft must report their position at these defined points to provide air traffic control with accurate tracking information. This can help in maintaining safe separation from other aircraft and assists in managing flight operations effectively.

The other options do not accurately describe the nature of compulsory reporting points. While airports along the route, waypoints agreed upon in the flight plan, and navigational aids may play important roles in navigation and route planning, they are not necessarily mandatory reporting points in the same way that the specific VOR/DME or VORTAC fixes are. These specific points are set by regulation and are critical to ensuring compliance with IFR flight rules.