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Flying Q-routes depicted on Low altitude enroute charts

Asked by: 1641 views ,
Airspace, FAA Regulations

Can an aircraft with a GNS 430 WAAS fly a Q route (Q102 depicted on L-21) above MEA but below 12,000 MSL on an instrument flight plan?

How can one acquire RNP10 authorization? 

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1 Answers



  1. John D Collins on Jul 15, 2019

    That route is an Oceanic route named Q102 and is not an RNAV Q route intended for FL180+. Note the difference in the color of the route name, it is black. It is an RNAV route, but used for both low and high altitude. The GNS430W can fly any RNAV or conventional route.

    RNP10 is defined in AC 90-105A. Normally two LRNS (Long Range Navigation systems) are required for Oceanic flight, but in the Caribbean only one is required. The GNS430W meets the requirements of a LRNS. RNP10 requires that a LOA (Letter of Authorization) be obtained and carried in the aircraft. You apply for the LOA at your local FSDO. It requires an application and the pilot needs to be trained. This is an example of where the equipment is capable, but authorization is required.

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