RNAV (Area Navigation) allows an aircraft to:

Only follow VOR radials

Navigate on any desired path within the coverage of ground or satellite-based navaids

Correct

Fly without any navigation equipment

Only fly published airways

Explanation

RNAV enables point-to-point navigation on any desired track, not limited to flying directly to/from ground-based navaids.

Test yourself with random questions from Instrumentation and all other ATPL subjects.