Perhaps we are all talking about the same thing, just with different semantics?
The way I understood this situation is as follows: When flying VFR but finding I need to ascend through a layer, I too ask for “IFR to VFR on top” routinely. They will usually ask I the plane is equipped for IFR flight, ask type, etc., but then give me a squawk and a clearance. True, I did not file a flight plan in advance, but I interpret what just occurred is that they essentially put one in the system for me. I am now on an IFR clearance/plan, which I need to cancel once I am in the clear.
Either way, a great option with usually very cooperative controllers, at least in my area of the world.
Douglas W. Johnson, MD PA
Don,
No, it’s you who is wrong. IFR to VFR on top is a common clearance, especially in places such as southern CA where an early morning and late evening marine layer is common. I’ve done it so many times I’ve lost count, not that anybody was counting in the first place. Raise your awareness.