Originally Posted by
jmcmanna
Replace "JFK" with "ORD" or "MDW" and the answer would be that it's done to keep the traffic moving and separated -- once you go missed, the tower treats you like a departure and will put everyone on different headings/altitudes to get as many airplanes out as possible.
I don't know the operation at JFK, so I can't say the above is the reason there -- but usually, the published missed approach is really inefficient when you're dealing with several airplanes because only one airplane can use it at a time. Using altitude and radar separation can allow 6 airplanes to all go missed in a row, keep them all separated, and potentially keep the departures going, too.
This is true for us here at NY as well. The missed approaches are all usually inefficient, and designed for 1 aircraft at a time. The criteria used by the flight checks to come up, and design a missed approach procedure does not account for multiple aircraft, or other potential conflicts with other airports or procedures.