TERPS
Terrain and obstacle database
Terrain awareness and warning system (TAWS) ...
TERPS - Certain airspace needs to be cleared for aircraft operations. This airspace is determined by the application of operating rules and terminal instrument procedures (TERPS).
TERPS Obstacle Clearance Chart
Segment Primary Secondary
Initial 1000' 500'
Intermediate 500' 500'
Final
VOR/DME, VORW/FAF, straight-in 250' 250'
VOR/DME, radial or arc final 500' 500'
NDB on airport, no FAF, straight-in 350' 350' ...
TERPS
Terminal Instrument Procedures - Criteria used for designing navigation procedures to land or depart airport runways. ILS is one example of a TERPS based procedure.
Terrain ...
The area in which random radar vectors below the MVA/MIA, established in accordance with the TERPS criteria for diverse departures, obstacles and terrain avoidance, may be issued to departing aircraft.
  
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