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Asked by: 26405 views Instrument Rating

How about a good explination of ODP's. 

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1 Answers

  1. John D. Collins on May 15, 2012

    Standard departures in IMC are based on an aircraft being able to climb to 35 feet above the departure end of the runway and climb to 400 feet within 2 NM before turning on course. After the turn on course, a climb rate of 200 ft/NM is standard.  When a depature can be continued in any direction , this is called a diverse departure. and such a runway doesn’t need an Obstacle Departure Procedure (ODP).  When this can’t be accomplished while providing satisfactory obstacle clearance, an ODP is developed. The ODP provides a graphical or textual description of a procedure to follow to get the aircraft to the enroute structure at the minimum enroute altitude. An ODP is optional and may be flown prior to joining the assigned course without an ATC clearance.  If there is a SID, the SID may only be flown if the pilot is cleared by ATC to fly it, but they usually include the same elements of an ODP, at least for the initial portions prior to arriving at an enroute altitude. Sometimes the ODP or SID  will require a climb rate greater than 200 feet per NM, in which case the pilot must determine if their aircraft has the performance capability available.  You can read more about the subject in the AIM section 5-2-8 that discusses the subject in detail.

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