# Amendment of Class D and Class E Airspace; Atwater, CA
> **Rule** · Final rule. · Published 2018-10-29 · Effective 2019-02-28 · 83 FR 54234
## Document
- **Document number:** 2018-23476
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 54234
- **Publication date:** 2018-10-29
- **Effective date:** 2019-02-28
- **FAA docket:** Docket No. FAA-2017-1091
## Abstract

This action modifies Class D airspace and Class E airspace extending upward from 700 feet above the surface at Castle Airport, Atwater, CA. Additionally, the airport's geographic coordinates have been updated to match the FAA's aeronautical database and the outdated term Airport/Facility Directory is replaced with Chart Supplement in Class D airspace. Airspace redesign is necessary as the FAA transitions from ground-based to satellite-based navigation for the safety and management of instrument flight rules (IFR) operations at this airport due to the decommissioning of the El Nido VHF Omnidirectional Range/ Distance Measuring Equipment (VOR/DME).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/10/29/2018-23476/amendment-of-class-d-and-class-e-airspace-atwater-ca)
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