Revision of Class D Airspace, San Diego, North Island NAS, CA

This action will amend the Class D airspace area operating times at San Diego, North Island Naval Air Station, (NZY) Halsey Field, CA. In April of 1998 the U.S. Navy reduced the hours of operation of the Air Traffic Control Tower (ATCT) at NZY. The reduction of the ATCT hours of operation has made this action necessary. The intended effect of this action is to modify the hours of the NZY Class D airspace area in the legal description of the controlled airspace. This action does not involve a change in the dimensions or operating requirements of that airspace containing Instrument Flight Rules (IFR) operations at NZY.