The whole problem is that there can not be a defined missed approach procedure - or altitude for a visual approach.
Many people seem very confused and unaware of the fact that a missed approach procedure is unique to and forms part of a specific approach procedure.
Just because;
at abc airport,
The ILS missed approach is straight ahead to 3 dme then the 180 radial to xyz vor climbing to 3000ft
and
The VORDME missed approach is straight ahead to 3 dme then the 180 radial to xyz vor climbing to 3000ft.
and
The NDB missed approach is straight ahead to 3 dme then the 180 radial to xyz vor climbing to 3000ft.
(The DME ident being common to all procedures)
It does not mean that the missed approach procedures are the same.
They are not. In fact they are very different. The criteria for obstacle clearance and tracking and the area within which obstacles have to be cleared is different in each of the above cases, as it the tollerance in position for the definition of the missed approach point.
Each is unique and part of the overall approach procedure.
Therefore, one can not ever ever fly an ILS to the above runway and complete the VOR missed approach.
So.
If everyone agrees that they would never fly the missed approach of the VOR procedure when making an ILS approach.
Then why do people think that it would be automatically OK to fly the ILS missed approach when the approach was a visual approach.
A visual approach can not have a defined missed approach because there is no way to say at what place and at what altitude the missed approach would be started.
That is why I say, if you don't want a surprise, obtain agreement from all the team as to what will be done if the approach is missed.
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The other aspect is that if ATC say follow the missed approach procedure for the VOR then, you have to respect the missed approach procedure as cleared and that includes tracking
before the missed approach point (because the obstacle clearance after the point is based on reaching that point on a defined track) and the minimum level at the missed approach point (because again that is what obstacle clearance is absed upon) and performance i.e. be able to complete the missed approach as cleared.
No who is going to say - whay bother just do a visual missed approach?
Regards,
DFC