BOAC, true visual doesn't depend on IAP and one can fly visual from any possible direction and altitudes.
The IAP can of course progress into a 'visual' but the visual does NOT depend on an IAP.
surely not neither does it cancel an IFR procedure in place for the RWY. In other words you see the RWY on downwind 27 at 5000 ft and report visual to the tower. ATIS promulgates ILS 27 in use. ATC clears you for a visual 27. So far so good. You being able to land on 27 by visual means doesn't cancel a valid ILS 27, doesn't it? Neither does it convert your flight into a VFR one, doesn't it? Consequently in my understanding one has got two choices for MA either published MA for the IAP in place or RV. That's the whole point. The only time when there's no valid IAP is when one flies to uncontrolled aerodrome in which case IFR will have to be canceled and change of rules from IFR to VFR will have to be accomplished. In this case the way to assure traffic separation is to stick to the VFR traffic pattern e.g 1500 ft LT. Lack of clear explanatory material causes lots of confusion on this topic. So far I haven't seen anyone in EU trying to join a VFR traffic circuit after MA.
Cheers.
