How much should be added to the authorized landing minimums when using the "1 Nav Aid table"?

When using the "1 Nav Aid table," it is essential to adhere to specific regulatory requirements for landing minimums to ensure safety and compliance. The increase of 400 feet and one mile to the authorized landing minimums compensates for potential navigation inaccuracies when only a single navigation aid is available for an approach. This adjustment is critical because relying on a single navigation source can increase the challenge of accurately determining one's position and approach path during landing, particularly in low visibility or adverse weather conditions. Therefore, adhering to these increased minimums enhances safety by providing a buffer that accounts for possible errors or limitations associated with single navigation aid approaches. This standard reflects industry practices and regulatory guidelines aimed at minimizing risks during flight operations.