Which statement accurately describes a characteristic or limitation of conventional radio navigation?

### Why this is right Conventional navigation uses ground aids and requires suitable certified aircraft equipment. The material also states that VOR/DME can support DME arcs or fixes and that radio-navigation charts can specify minimum altitudes. ### The concept A radio-navigation route is structured around aids and their available coverage. Procedures use published information to define route segments and operating requirements. Coverage is not universal: remote and oceanic regions may lack ground-aid signals, so statement D reverses the limitation described in the material. ### The other options - **D. Remote or oceanic areas always have complete ground-aid coverage.**: the material says such areas may have no coverage, so this is the opposite of the stated limitation. ### Terms - **Very High Frequency Omnidirectional Range (VOR)**: a ground aid used for direction information. - **Distance Measuring Equipment (DME)**: a ground-based radio aid that supplies distance information. - **DME arc**: a procedure that follows a curved path at a specified distance from a DME station. - **Fix**: a defined position used in navigation or a procedure. ### Remember Coverage gaps and published chart requirements determine whether a conventional route is usable.