Page:CAB Accident Report, Western Air Lines Flight 636.pdf/3

 below. Dept. of Comm. - CAA - LAX - Region Six - "Joint Operations Letter - Revised effective April 10, 1952. Oakland Air Route Traffic Control Center No. 18. Oakland Airport Traffic Control Tower No. 7.

San Francisco Airport Traffic Control Tower No. 4. SUBJECT: CONTROL OF TRANSBAY TRAFFIC - SAN FRANCISCO AND OAKLAND.

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The ceiling and visibility at San Francisco was 800 feet and 10 miles 700 feet and 10 miles at Oakland.