ENCL: (1) TO COMDTINST 16550.5
USCG Loran Station Seneca
P.O. Box 28
Fax (607) 869-5395
COCO Northeast U.S. Chain (9960)
FAA NOTAM Office (ATM 611)
LCDR B. A. Jones
Date: 01 Dec 1993
LORAN-C CHAIN 9960 UNUSABLE FOR AVIATION NON-PRECISION APPROACHES
DUE TO AUTOMATIC BLINK SYSTEM MAINTENANCE AT MASTER.
Explanation: The entire 9960 Chain is unusable for non-precision approaches due to maintenance
of the Automatic Blink System at the master station
Loss of the master's ABS will make the entire chain unusable to pilots for non-precision
approaches. The chain is still usable for enroute air navigation so it is important to specify that
only non-precision approaches are effected.