"Stan Prevost" wrote in message
...

That is the answer you gave. Why is it the correct answer?


Because that's where 1000' comes from.



91.155(c) does
not define VFR conditions or permit any operation. It only prohibits
certain operations under certain conditions. How does it contribute
toward
satisfying the rule ATC must follow to ensure that VFR conditions exist
before issuing a clearance for a visual approach?


The controller must ensure that weather conditions at the airport are VFR
prior to issuing a visual approach clearance. If you have a ceiling of less
than 1000' in a surface area you do not have VFR conditions and a visual
approach is not available.



That is not correct. On a contact approach, the pilot must remain clear
of
clouds.


Yes, he must remain clear of clouds, which just happens to be the same as
VFR cloud clearance requirements in Class B airspace and Class G airspace
during the day. But VFR cloud clearance requirements are greater in Class
C, D, and E airspace, and yet the pilot must still remain only clear of
clouds on a contact approach. He does not have to follow VFR cloud
clearance requirements on a contact approach or a visual approach.



However, I did not say that the IFR operation is subject to VFR cloud
clearance rules. I said that for VFR conditions to exist, one must be
able
to operate under VFR, including obeying cloud clearance rules.


Yes, you said that. It's not true.



In other
words, VFR conditions are defined in 91.155(a). When the requirements of
91.155(a) are not met, VFR conditions do not exist and a visual approach
clearance may not be issued in accordance with the ATC manual.


That's true, but that does not mean that pilots must adhere to VFR cloud
clearance requirements on a VFR approach. Whatever gave you the idea they
did? What purpose would that serve?