I often hear about ATS delaying IFR flight plans by hours due to some allocated en-route slot. Just a few days ago again. A Cessna 421 wanted to depart the towered airport and TWR told the pilot that he now has to wait for 2 hours. The airport was not busy at all and en-route, there isn't a problem either. Most IFR traffic is above FL180. The space all the way up to FL180 is mostly empty skies and the slots are necessary not because of conflicting traffic but rather because the number of aircraft within a sector is apparently limited. This should be changed. The Cessna 421 pilot, of course, didn't have the time for that wait and proceeded VFR - this is lost safety right there, due to a rule that most likely isn't based on safety. This puts the pilot into a sudden change of plans, it can be assumed that a flight takes place with less accurate planning, if an IFR flight was expected and the pilot has to suddenly change the whole route to VFR.
ATC should be required to accommodate as much IFR traffic as possible, especially so at the lower flight levels, and should also allow (and welcome!) simple changing of flight rules, to amend a VFR flight plan in the air to IFR. This would enhance safety dramatically. Encourage IFR flying, make it more simple, easy and convenient, have more safety.
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General Aviation