Well, you're effectively doing a 'Visual Approach' every time you proceed below your 'Visual Descent Point' (VDP).
It pays to remember that when you are doing a 'Visual Approach' you are, in fact, still operating in accordance with 'Instrument Flight Rules' (IFR). I.e. You can request a 'Visual Approach' from your ATC Controller and, if it's granted, you can continue towards the runway 'visually' (
subject to certain provisos) and during which process you are responsible for your terrain separation, whilst the ATC Controller remains responsible for your 'traffic' separation. Your local Regulator will almost certainly have limitations in place wrt to the visibility requirements required for conducting a 'Visual Approach'. Your airline might also have additional limitations. And the country and / or airfield where any 'Visual Approaches' are being conducted might also have specific restrictions / limitations.
That said, please be in no doubt that a 'Visual Approach' is
not the same as a 'Circling Approach'; and furthermore - wrt 'Circling Approaches' - do not confuse the requirements & limitations as defined by PANS-OPS vs TERPS (
and there are substantial differences, and safety implications between the two) !
And, fwiw, here's your's truly doing a Right Hand 'Visual' to Kabul R11 (
best viewed in HD) and for which there is no published approach, or even PAPI's and a 'square pattern' it most definitely is not (
you basically look out the window and do your best to judge the RoD and the turns... hence the frequent rolling)... so is that 'Visual' enough ?
https://www.youtube.com/watch?v=I8HWGQ7Y2n8