RegulationsEn-route Navigation
Lowest Safe Altitude (LSALT)
Lowest Safe Altitude (LSALT) is the lowest altitude that provides a minimum clearance of 1,000 ft above all obstacles and terrain within a specified area or along a route segment. Grid LSALTs are published on En Route Charts (ERCs) and other navigation charts. Pilots operating below the LSALT are responsible for ensuring their own terrain clearance.
Key Points
- •Provides a minimum clearance of 1,000 ft above all obstacles and terrain within a specified area or route segment.
- •Grid LSALTs are published on En Route Charts (ERCs) and other navigation charts.
- •Pilots flying below the LSALT are responsible for their own terrain clearance.
- •Used as a safety reference for route planning and emergency descents.
Exam Relevance
Essential for safe navigation, especially in marginal weather or night VFR, ensuring the aircraft avoids terrain and obstacles.
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