Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
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Status: STD 2005/06/07
Code: 313

Concept definition: A <TERRAIN_SURFACE_REGION> affording protection or shielding from hostile ground observation and flat projecting fire; defensive position defilade. The protection is provided by a <TERRAIN_OBSTACLE> (for example: a <DEFENSIVE_POSITION>, a <HILL>, and/or a <PARAPET>).
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