From: email@example.com (BrianM4463) Organization: America Online, Inc. (1-800-827-6364) Date: 04 Dec 95 01:14:49 References: 1 Followups: 1
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There really isn't such a thing as "fog certification", although there IS something called Category II or Category III certification, both for aircrews and airplanes. The ILS equipment and approach profile also must be certified to the same specification. This certification allows a crew and airplane to fly an instrument approach to lower ceiling and visibility minimums than a normal ILS approach, which is normally 200' ceiling and 1/2 mile visibility. The crew was almost certainly certified in at least Cat II, as was the airplane. Generally, Cat II minimums are 100' ceiling with reduced visibility (called RVR). A crew can fly a Cat II approach down to 100', and if the runway environment is not visible, they must miss the approach and at their option, try again. Cat III can go down to zero-zero, theoretically. My guess is either: a) the weather was below Cat II minimums and there was no Cat III approach available (or the crew wasn't Cat III current) or b) The airplane wasn't current in Cat II or Cat III for some reason (pretty unlikely, given where it was flying) Most likely, the fog was just to doggone thick for a safe landing. Just my 2 cents.