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minimum obstruction clearance altitude
The specified altitude in effect between radio fixes on very high frequency omnirange airways, off-airway routes, or route segments, which meets obstruction clearance requirements for the entire route segment, and that assures acceptable navigational signal coverage only within 22 miles of a very high frequency omnirange.
Source: US DoD Joint Publication 1-02, DOD Dictionary of Military and Associated Terms (as amended through 9 June 2004).
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