Apollo 50, 55, 60, 65 Operations, What are En Route, Terminal, and Approach

Approach Basics (GX50/60)

to predict whether RAIM will be available at the estimated time of arrival at the destination. Your Apollo GX provides you with a RAIM prediction page. This page allows you to determine if RAIM should be available at any location and time. If it says RAIM will be available, it actually means that it will be available at your predicted time of arrival and plus and minus 15 minutes from your arrival time calculated at 5 minute intervals.

RAIM prediction is required to be done automatically by the equipment for the estimated time of arrival at the FAF and the MAP when you are 3 nm inbound to the FAF.

TSO C129 requires the RAIM alarm limit to be at least 2.0 nm for en route operations, 1.0 nm for Terminal operations, and 0.3 nm for Approach operations.

What are En Route, Terminal, and ApproachOperations?

Approach RAIM, or 0.3 nm alarm limit, is provided from 2.0 nm inbound to the FAF until you cancel the Approach Active operation (usually at the MAP). Approach RAIM is provided only if an approach is loaded into your active flight plan and it is enabled.

Terminal RAIM, or 1.0 nm alarm limit is provided within 30 nm of your departure and your destination airport (except when Approach RAIM is provided). This is automatic and requires no pilot action. For those of you who are familiar with the traditional definition of Terminal, which was the ability to operate on SIDs and STARs that are only 4 nm wide, the term Terminal has been “redefined” in TSO C129 to mean within 30 nm of your departure or destination.

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