The OROCA provides 1000 feet obstacle clearance in non-mountainous areas and 2000 feet clearance in mountainous areas. However, the 2012 FAA Instrument Procedures Handbook states (excerpt below) in a another sentence that OROCAs do not provide acceptable terrain clearance.
My question: Why state that OROCAs provide 1000/2000 terrain clearance in one sentence yet in the next sentence terrain clearance is not acceptable? How do you plan safely?
"OROCAs depicted on en route charts do not provide the pilot with an acceptable altitude for terrain and obstruction clearance for the purposes of off-route, random RNAV direct flights in either controlled or uncontrolled airspace."