November 11, 2009
The following stories from the May 30, 2003, edition of AOPA ePilot were provided to AOPA members who expressed an interest in the particular subject areas. Any AOPA member can receive information customized to their areas of interest by updating their member record file online.
Question: On my sectional chart, there is a white box with magenta borders in a Military Operations Area. It shows the letters "CTC" followed by a frequency. What is this?
Answer: The white boxes with magenta borders are depicted on current sectionals. They are meant for VFR aircraft flying in that area, giving them information enabling them to contact air traffic control without the need for other publications. The letters "CTC" stand for "contact" and the information following is the facility and frequency that should be used. A good source of information on charts is the Aeronautical Chart User's Guide . You may also be interested in reading two articles from Flight Training magazine, "Chart Basics" and "How to Read a Sectional Chart."
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