well.. i think that "own navigation" thing is from former times when controllers didnīt really care if the aircraft was flying directly to a nav-aid or not, because vertical separation was assured and it didnīt make too much of a difference, because there was not too much traffic beeing controlled.
since traffic has increased a lot (at least where i am working) and lots of on-way airways have been introduced (often laterally separated by not more than 7 miles) i really donīt want pilots to resume own navigation!!!
i either want them to fly to a previously assigned point or on the route they filed...
