Quote:
Originally Posted by FlyingFish
Very good question.
The answer is based on ... is assumed to be at or less than ISA+25 using the Enroute net ceiling chart. From p 5-8 paragraph a) " based on the ambient temperatures expected enroute"
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if I understand what you're saying, with FMS inop there should be a more restrictive TC that will guarnatee a net ceiling equal to or higher than MEA under all conditions, for the purpose of navaid reception. sounds like a great idea but I'm not sure how it's relevant to the question.
The fact remains that J15 is brown but this route doesn't have TC/DD info. we've speculated that the part of the route that requires TC/DD info if it's brown is the cruise part, above the valid altitude (FL240/250) and that the departure and arrival phases have their own MEA/MOCA's and need no TC/DD because the airport of departure/arrival is accessible at all weights and ISAs.