Loran Station Yap

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Loran Stations
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Monitor Stations
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Areas, and Sections
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   NAVCEN

Other Entities
    Construction Comand Unit 203
    Construction Det "A"
    Guam Advance Base
    Subic Bay
    Wildwood
    USCGC Kukui

External Links
Coast Guard Historian Loran Units

Jerry Proc's Hyperbolic Radio Navigation Systems Page

Dennis McCord's Estaca de Vares website

LORAN STATION YAP ISLAND
LORAN A: 09 32 56.32 N 138 09 38.74 E (1960 Mercury Datum)
LORAN C: 09 32 45.660 N 138 09 55.230 E

Pictures:

Fact Sheet:

Site Survey:
Construction Date
Constructed by:
Established:	12 SEPT 1964 - commissioned 22 OCT 1964 - Station dedicated
Disestablished:
Operated by:	USCG
Chain:	LORAN C: NORTHWEST PACIFIC
Station Letter designation:	LORAN A: 2L1, 2L2: “Y” LORAN C: “Z”
Station code name:	LORAN C: PACE III (1962-SEASIA Chain)/Cancelled 1963
Station Unit Number:	Z40180
Station nickname:	YAP
On-air testing date:	LORAN C: JAN 1965
Operational date:	LORAN A: 01 FEB 1965 LORAN C: 1965
Operations Ceased:	LORAN A: 312400Z DEC 1977 LORAN C: 1987
Station Operation:	LORAN A: Double MASTER LORAN C: Single SLAVE/SECONARY “Z”
Station pair:	LORAN A: 2L1, ANGUAR 2L2, GUAM LORAN C: SS-3, GESASHI, HOKKAIDO, IWO JIMA, MARCUS 9970, GESASHI, HOKKAIDO, IWO JIMA, MARCUS 7930, GESASHI, HOKKAIDO, MARCUS 9970, GESASHI, HOKKAIDO, IWO JIMA, MARCUS
Loran Rate:	LORAN A: 2L1, 2L2 LORAN C: SS-3, 9970, 7930
On-Air:	LORAN A: 2L1, 01 FEB 1965 2L2, 01 FEB 1965 LORAN C: SS-3, JAN 1965 9970, 25 FEB 1975 7930, 210300Z FEB 81 – Chain reconfigure due to IWO twr maint 9970, 310700Z MAR 81 – IWO BACK ON-AIR
Off-Air	LORAN A: 2L1, 312400Z DEC 1977 2L2, 312400Z DEC 1977 LORAN C: SS-3, 25 FEB 1975 9970, 202300Z FEB 1981 7930, 310300Z MAR 1981 9970, 1987 YAP Ceased Loran Ops
Monitor Rate:
Equipment:	LORAN A: AN/FPN-30, T325B, AM-1700 AN/FPN-3A LORAN C: Construction started Dec 1963 and completed Feb 1965 Twr fell 5 MAY 1964 @ a height of 780 ft Chain reconfigured in 1964 due to Iwo and Yap tower failures\ Early Jan 1965 the 1000ft twr completed 1965: AN/FPN-45/46, 1mw
Antenna Type:	LORAN A: LORAN C: 1000ft – Dresser-Ideco, Model 20097 1964 – MAY 1964 1000ft – Dresser-Ideco, Model 20097 JAN 1965
Personnel Allowance:
Miscellaneous:	Located on Gagil-Tomil Island 4 APR 1964 – Tower structurally unstable 5 MAY 1964 – Tower collapse 1967: Named Change to YAP ISLAND from YAP
Commanding Officers / Officers in Charge	LORAN A/C: CO: LT John Earhman 1964 CO: LTJG Powers 1964 -1965 CO: LTJG Morgan 1965 -1966 CO: LTJG Jeff Bull ? - NOV 1966 CO: LTJG Walter Donaghy NOV 1966 - 1967 CO: LTJG Rutherford 1967 - 1968 CO: LTJG Marcum 1968 - 1969 CO: LTJG Callis 1969 - 1970 CO: LTJG Shattie 1970 - 1971 CO: LTJG Douglas Kroll NOV 1972 - NOV 1973 CO: LTJG Charles W. Belsky NOV 1973 - 1974 CO: LTJG C. Hooper 1975 - 1976 LORAN C: CO: LTJG Robert Zimmer 1978 - 1979 CO: LT John R Williams 1979 - 1980 CO: LTJG Fitzpatrick 1980 - 1981 CO: LT Robert Garrett 1981 - MAY 1982 CO: LTJG Jay Ellis MAY1982 - JUN 1983 CO: LTJG Will Agen JUN 1983 - 1984 Last CO: LT Mike Hazel 1986 - 1987

Pictures: Click on picture for larger image

Picture from google earth.

Photos below were contributed by Carl MacDonald

The main building, off in the distance the water storage tanks and the loran "C" tower and transmitter building

Electronics and engineering building, basketball court, etc

Looking back at the buildings from near the loran "C" tower

Station Patch c./1973

Two photos were taken from the 125 foot tall Loran "A" tower. ET3 Don Bader and I were allowed to climb the tower while the transmitter was shut down for maintenance sometime in 1974. I remember that I had one heck of a sore throat and fever...tonsillitis...but I wasn't going to pass on the chance to go up the tower. Earlier, late 73/early 74, the 1000 foot Loran "C" tower had been shut down for painting and a number of the guys were allowed to climb the tower, but not I. Being the only Corpsman, the CO wanted me on the ground in case something happened, which in my 20 year old brain I thought was pure BS, but so it goes, eh.

I always found it interesting how the main road in the area cut right through the middle of the station.

Thanks Mac!

Station c./1976