# Amendment of Area Navigation (RNAV) T-348 and Establishment of T-409; Northcentral United States
> **Rule** · Final rule. · Published 2021-11-23 · Effective 2022-01-27 · 86 FR 66454
## Document
- **Document number:** 2021-25469
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 66454
- **Publication date:** 2021-11-23
- **Effective date:** 2022-01-27
- **FAA docket:** Docket No. FAA-2021-0288
## Abstract

This action amends RNAV route T-348 and establishes RNAV route T-409 in the northcentral United States. This action expands the availability of RNAV routing in support of transitioning the National Airspace System (NAS) from ground-based to satellite-based navigation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/11/23/2021-25469/amendment-of-area-navigation-rnav-t-348-and-establishment-of-t-409-northcentral-united-states)
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