What is the preferred order for refueling stop fields according to the guidelines?

The preferred order for refueling stop fields is based on the guidelines that prioritize efficiency, cost-effectiveness, and service quality. Contract Fixed Base Operators (FBOs) are generally the preferred choice for refueling due to their established agreements, which typically provide lower fuel prices and priority service for operators who have contracted with them. This can help ensure a smoother and more efficient refueling process, as they are incentivized to maintain a high standard of service.

Military installations can be a secondary option when planning refueling stops, as they often provide fuel services without the typical commercial markup. They may also have advantageous locations or access that can be beneficial for flight routing.

Non-contract FBOs, while they can still provide refueling services, are generally considered less preferable in this context since their pricing and service levels can be more variable, which may lead to delays or higher costs.

Thus, the correct order begins with Contract FBOs, followed by Military installations. Non-contract FBOs are recommended last due to the risks associated with unpredictable costs and service.