Defining Alternates
The article Alternate Realities [Airmanship, January] left out probably the most important and least understood criteria for alternate airport selection. Mr. Veillette starts out talking about the ceiling and visibility requirement of 600 and 2 for precision approach and 800 and 2 for non-precision approach equipped airports, and goes on to say that there is more to it than that. Unfortunately, he then goes on to only explain half of the remaining equation – the most important and most overlooked part.
In the authors explanation he is referring to the government charts, not Jeppesen. The government charts use the A in the triangle to define IFR Alternate Minimums. First, you must c…