RNP 10 in the Gulf of Mexico

The Gulf of Mexico (GOMEX) is one of the busiest and most important flight routes, it connects North, Central, and South America, and every day hundreds of international flights pass through it, making good traffic control essential.

To make flights safer, handle more traffic, and keep operations running smoothly, the FAA and SENEAM put in place RNP-10 routes — a navigation standard that is now key for flying in this area.

Understanding RNP-10

Required Navigation Performance 10  or RNP-10 is a navigation standard that requires aircraft to stay within 10 nautical miles of their intended path 95% of the time. It’s mainly used in remote or ocean areas where radar is limited. This accuracy lets planes fly closer together  50 miles apart instead of the usual (90–100 NM) so more flights can use the same airspace safely.

Normally, RNP-10 needs two independent Long-Range Navigation Systems (LRNS). But in places like the Gulf of Mexico the FAA allows RNP-10 with only one Single Long-Range Navigation System (S-LRNS ).

LOA B036 vs. LOA B054

To operate in RNP-10 airspace, an operator must hold a valid Letter of Authorization (LOA) issued by the FAA:

• LOA B036 – Authorizes RNP-10 capability with two independent LRNS; allows access to all RNP-10 routes worldwide.

• LOA B054 – Authorizes RNP-10 capability with a S-LRNS); approved only in specific regions such as the Gulf of Mexico or Caribbean.

Routes for  Non-RNP Operators

For operators not equipped for RNP 10, two designated routes remain available:

• A770 / UA770

• A766 / UA766

These routes require traditional lateral separation and are less efficient, but they ensure safe and compliant access to the region when RNP capability is not available.

Flying across the GOMEX means knowing the airways, ensuring your aircraft is properly equipped, and holding the correct LOA — B036 or B054. With RNP-10 routing, operators can plan more direct flights, reduce fuel burn, and maintain access to high-demand airspace in this critical region.