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obstacle clearance box |
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obstacle clearance box [′äb·stə·kəl ¦klir·əns ‚bäks] (navigation) A rectangle on an aeronautical chart which encloses a number indicating the obstacle clearance required (in feet) on an approach segment where the box appears. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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