Thread: Jepp question
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Old 04-20-2012 | 04:38 PM
  #5  
jakespeed
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From: CRJ-700 Captain
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Originally Posted by USMCFLYR
jake -

I know that Jepp grabs their information from the FAA databases and there is a switch going on in the charting conventions.
The minimums were calculated from the TDZE (as you see from the ILS RWY 24 approach plate - at least from the TPPs). This approach was commissioned back in early 2007 and is still an ORIG-A version.

ILS RWY 6 was also commissioned in early 2007, but has undergone an Amdendment update as early as May 2011. It is using the new convention of a reference point on the threshold (THRE) for calculations of the minimums.

I think this has something to do with the differences that you are mentioning. It is my understanding that has approaches are updated you will see the measurement point changing.

USMCFLYR
That makes sense as well. *grumble grumble aviation grumble nothing's ever simple grumble grumble*
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