January 2004 Issue

Letters: 01/04

WAAS Worries
I enjoyed your article on the status of GPS WAAS in the November, 2003 issue. On page 18, you used the example of the GPS 32 approach at Gaithersburg, Maryland, my home base. While this demonstrates the potential benefits of WAAS, this particular approach is totally useless to civilians.

Thats because you need to enter the FREEZE zone surrounding DCA VOR. My guess is that only when hell freezes over will civilian aircraft be able to enter that zone. The approach is not available at night.

Look at the weird wording they use to say that on the chart: No straight-in or circling at night. (What else is there?) The new GPS 14 approach also uses the FREEZE...

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