To split hairs:
From the FOM....
A pilot, on an instrument approach may revert to a visual approach:
. 1 If it is required by ATC seperation procedures blah blah
. 2 If it becomes more efficient to continue with the visual approach rather than complete the full instrument approach procedure
All subject of course to briefing the extra required bits........ The FOM of course doesn't say anything about having to be established on final before taking the visual. So you actually have a fair bit of leeway. To be honest TU, I don't think that telling DXB approach that you're visual is going to work with all the other traffic - but try it at places like EBB, ACC etc. It works nicely
