Question: what is the difference between vfr on top and vfr over the top?
Answer: It's easy confuse "VFR-on-top" with "VFR over-the-top." A VFR on-top clearance is an IFR clearance that allows pilots to fly at VFR altitudes. VFR over-the-top, on the other hand, is an operation where you maintains VFR cloud clearance requirements while operating on top of an overcast layer.