Instrument Rating Exam · Practice

When calculating LSALT for a route segment without a published LSALT, the standard method uses:

• A.The highest obstacle within 10 NM each side of the planned track plus a fixed 500 ft buffer
• B.The mean elevation of the terrain along the route segment plus a standard 2,000 ft margin
• C.The highest mountain within the grid area of the route plus a fixed 1,000 ft buffer
• D.The highest obstacle within 5 NM each side of track plus a buffer (25% above 1,000 ft, min 1,000 ft AGL)