Article 51825 of sci.geo.satellite-nav:
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From: kdsnts.nospam@microlink.net
Newsgroups: sci.geo.satellite-nav
Subject: GPS on Southwest
Date: Mon, 01 Dec 1997 13:52:14 GMT
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A Southwest airlines co-pilot showed me his operating manual on Nov.
16, 1997.  It specifically mentions that a GPS was approved.  The only
restriction on it's use was during taxi, takeoff and landing.  

Keith Stubblefield