[Code of Federal Regulations] [Title 14, Volume 3] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR170.25] [Page 214] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 170_ESTABLISHMENT AND DISCONTINUANCE CRITERIA FOR AIR TRAFFIC CONTROL SERVICES AND NAVIGATIONAL FACILITIES--Table of Contents Subpart C_LORAN-C Sec. 170.25 LORAN-C discontinuance criteria. A LORAN-C nonprecision approach may be subject to discontinuance when the present value of the continued maintenance costs (PVCM) of the LORAN-C approach exceed the present value of its remaining life-cycle benefits (PVB): PVB/PVCM < 1.0