4-46  The primary and secondary areas determine obstacle  clearance in both the entry and maneuvering zones. The  use of entry and maneuvering zones provides further relief  from obstacles. The entry zone is established to control the  obstacle clearance prior to proceeding outbound from the  procedure turn fix. The maneuvering zone is established  to control obstacle clearance after proceeding outbound  from the procedure turn fix.  requirements are necessary to stay within the protected  airspace and maintain adequate obstacle clearance. [Figure  4-32] A minimum of 1,000 feet of obstacle clearance is  provided in the procedure turn primary area. [Figure 4-33]  In the secondary area, 500 feet of obstacle clearance is  provided at the inner edge, tapering uniformly to 0 feet  at the outer edge.  Figure 4-25. Missed approach point depiction and steeper than standard climb gradient requirements.  NO T FOR NA VIGA TION SW-3, 18 NOV 2010 to 16 DEC  , 18 NOV 2010 to 16 DEC 2010 T his NOTE on the ILS RWY 8 chart for the missed approach climb r equir emen t  applies to all lines of minimums. If you are unable to make the climb r at e/g r adien t,  you must use the higher minimums on the separately published LOC RWY 8  chart that meet the standard climb gr adien t of 200 ft/NM. 2010 SW-3  S  0 