What must high mins captains do when making an approach at a provisional or refueling airport?

The requirement for high minimums captains to increase minimums by 1/2 statute mile visibility and to increase the minimum descent altitude (MDA) or decision altitude (DA) by 100 feet when making an approach at a provisional or refueling airport is crucial for safety. This adjustment is in place to ensure that high mins captains have a greater margin for error during their descent and approach, especially at airports where they might have less familiarization or when the operational environment may not be as well supported by infrastructure as other, more regularly used airports.

High mins captains typically have less experience or training in certain aircraft operations. Therefore, applying a more conservative approach to visibility and altitude helps mitigate potential risks associated with unfamiliar approaches or limited conditions. This addition to minimums is a safety protocol to enhance the pilots' decision-making capability and ensure that they are well above the minimum safety requirements when executing an approach, particularly at airports that may not provide the same level of reliability and operational conditions as established airports.

In contrast to the other options, which either suggest using established Category II minimums, maintaining standard visibility and descent rates, or relying solely on radar assistance, the correct response emphasizes the unique requirements placed on high mins captains, highlighting the