"Steven P. McNicoll" wrote in message
news



91.155(c), which was the specific regulation you referenced, defines a
prohibition
against VFR operations under certain conditions in any airspace.


The question was, "Where does the 1000 come from?" The answer is FAR
91.155(c).


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



For VFR conditions to exist as required by 7110.65 7-4-3(b) in order to
clear an aircraft for the IFR operation under discussion, one must be
able
to operate under VFR, including obeying cloud clearance rules.

That is not correct. The only IFR operation subject to VFR cloud
clearance requirements is VFR-on-top.


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

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. 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.