skylog
29th Mar 2008, 13:42
What is the OCH at the FAP/FAF? or
What is the OCH in the primary sector of the final approach segment?
seem to be getting contradictions when looking at different sources.
Home Ranger
29th Mar 2008, 14:49
The OCH is the minimum height the MDH or DH can be.
OCH = Height of highest obstacle in the final approach + MOC
Non precision MOC = (90m without FAP/FAF or 75m with FAP/FAF),
Precision MOC is dependant on aircraft approach speed etc,
Circling approach MOC is different for different categories of aircraft (however, there are some not less than OCH published, eg 150m for a class B aircraft).
All of these will be the OCH in the primary area.
The FAF/FAP is the transition from intermediate to final approach and the MOC reduces at this point from 300m to 150m.