NAVSECGRU Stations Past and Present

Listed Alphabetically by Location


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STATION  Desig.   Callsign   Type   Est.     Disest.       Remarks   
Leyte, PI AU _ DF 16 Jul 1945 17 Sep 1945 SUPRADSTA
London, UK _ NST1/GXH3 _ _ * NCU 32
London, UK _ _ CS 4 May 1979 30 Sep 2004 Former NSGA. NSGDet est. 4 May 1979
Lualualei, Oahu, HI L NPM DF Nov 1937 Mar 1942 Nov 1937  CXK HFDF installed.
Moved to Wahiawa
Manus, Lorengau,
    Admiralty Islands		 AT NTF DF 17 Jun 1944 1 Oct 1945 SUPRADSTA
Mare Island, CA _ (NPG) DF Apr 1935 Jun 1940 Apr 1935  XAB-RAB HFDF installed.
May 1935  CXK HFDF installed.
Experimental
Marietta, WA _ NPC/NGO DF 1 Nov 1952 Mar 1972 Former NRS(R) then NSGA
Commissioned 15 Apr 1953
Mariveles, PI C _ RI 1 Mar 1935 Jan 1936 Moved to Cavite
Mayport, FL _ (NRB) CS DS 1 Aug 1974 Sep 1986 NSGA. NSGDet in 1974. At NAVSTA Mayport.
Medina/San Antonio, TX _ _ _ Jan 1970 Dec 1970 NSGDet at Lackland AFB Annex
Medina/San Antonio, TX _ _ _ 5 Oct 1993 Active NSGA at Lackland AFB Medina Annex
On 01 Oct 2005 renamed as
NAVIOCOM TEXAS
NSA/CSS Texas -- MRSOC
Melbourne, NSW AS B _ RI May 1942 1 Nov 1945 FRUMEL - At Moorabbin
Menwith Hill, UK _ _ _ < 1 Oct 1995 10 Jul 2015 Early years - informal U.S. Navy
detachment w/CTRCS in charge.
Oct 92-Oct 95: U.S. Navy Unit, Menwith Hill.
Oct 1995-Oct 2005: NSGA, tennant of
USAF Menwith Hill Station.
On 03 Oct 2005 renamed as
NAVIOCOM MENWITH HILL UK
Disestablished July 10, 2015.
Midway Islands, USA AF NGQ/NQM DF RI Nov 1941 Feb 1971 NCU 43 active from 1 July 1954.
NSGA - on Eastern Isl.
Misawa, Japan _ NDT9/NEZ DF 5 Jan 1962 10 Oct 2014 NSGDet from 5 Jan 1962..NSGA est.
Mar 71,commissioned 1 July 1971.
Located at US Air Base.
On 03 Oct 2005 renamed as
NAVIOCOM MISAWA JA
Disestablished on 1 Oct 2014
Misawa, Japan _ _ _ (1995) * NSGSuppDet
Molesworth, UK _ _ _ Oct 1991 Active NSGSuppDet Four.
EUCOM JAC at RAF Molesworth
On 03 Oct 2005 renamed as
NAVIODET MOLESWORTH UK
Monterey, CA _ none _ 10 Feb 1976 30 Sep 1999 NSGDet at DLI.. Trans. to NTTC Det
Morotai Island, Indonesia _ _ DF 24 Jan 1945 3 Feb 1945 Netherlands East Indies during WWII
Muirkirk, MD AM _ DF RI RFP Sep 1942 * Sep 1942  CI research station est.
East Coast Equip Research Station
Naples, Italy _ ( NNI ) DS CS Jan 1952 31 Mar 2005 COMSEC 601. Jan 1952 as NCU - 1958 as a NSGDet -
Upgraded to NSGA on 1 Oct 1979
located at Agnano - moved to Capodochino
disest 31 Mar 2005.
Newport, RI _ NAF CS (2 Oct 1958) 1973 COMSEC Det 203
Norfolk, VA _ _ CS 4 May 1979 Active COMSEC 201 - NSGDet.
NSGA established 1 April 1994.
On 03 Nov 2005 renamed as
NAVIOCOM NORFOLK VA
Norfolk, VA _ _ _ ( 1997 ) Active NSGSuppDet.. On 03 Oct 2005 renamed as
NAVIODET NORFOLK VA
Northwest, VA _ NAM DF CS Oct 1953 30 Sep 2001 NSGA Oct 1975. former NRS/NSGDept.
COMSEC 202 xfrd hr fm Cheltenham.
NCO Ops transferred to Ft. Meade, MD on
1 June 2001. Disest. on 30 Sep 2001 and
transferred to Norfolk.
North West Cape, W. AS _ NWC _ 16 Sep 1967 Oct 1992 NSGDept of NCS Harold E. Holt
Noumea, New Caledonia AL none RI Jul 1943 1944 Evacuated from Guadalcanal
Okinawa, Aragusuku
    Ryukyu Islands, Japan		 AL NCN DF RI Jul 1945 Nov 1949 SUPRADSTA    Jul 1945 - Jan 1947
COMSUPACT    Jan 1947 - Nov 1949
ComUnitSupp #3256
3256 was the Navy Post Office Number
for Okinawa known as "Navy No. 3256."
Okinawa, Tengan
    Ryukyu Islands, Japan		 AL NCN DF RI Nov 1949 1955 NCU 37. Moved to Futenma.
Okinawa, Futenma,
    Ryukyu Islands, Japan		 _ NCN DF RI 1955 Aug 1960 NCU 37    1955 - Aug 1957
NSGA    Aug 1957 - Aug 1960
All OPS ceased in Oct 1962.
Okinawa, Hanza,
    Ryukyu Islands, Japan		 _ NCN DF RI CS Aug 1960 Jun 1998 CS #704 NSGDet. - RI at JSPC Sobe.
JSPC Torii Stn, Sobe moved to Kunia in 1980
NSGA Hanza Ops began Oct 1962.
NSGA Closed 1 June 1998
CDAA/Ops Bldg finally removed
in June 2007.
Olongapo, PI C (NPT) RI Jul 1930 Feb 1935 Moved to Mariveles
Ominato, Japan _ _ RI 15 Dec 1945 22 Apr 1946 COMSUPACT Detachment.
Moved to Yokosuka
Palmyra Island, USA AH NIX NEP DF 28 Apr 1942 16 Jan 1946 Feb 1943  DF station est.
SUPRADSTA..Transferred to CG
Pearl Harbor, Oahu, HI H _ Various 1938 See Remarks See notes at end of list
Pearl Harbor, Oahu, HI _ _ DS Oct 1951 30 Sep 2004 NSGDet .. NSGA from 1 July 1982.
disest. 9-30-2004 and merged with Kunia
to become NSGA Hawaii
Peiping, China A (NPP) RI 1927 Jul 1935 Moved to Shanghai
Pensacola, FL _ _ _ Oct 1986 Active NSGDet from Oct 1986; NSGA from July 1993
On 03 Oct 2005 renamed as
NAVIOCOM PENSACOLA FL
located at Corry Station
PhuBai, VN _ _ DS CS Jan 1968 6 Oct 1972 NSGDet - at 8th RRFS, PhuBai, Vietnam.
During Vietnam war - Evac. on 6 Oct 1972
Point Arguello, CA Z NPK DF 1938 18 Jun 1943 NAVRAD DF STA..Moved to Goleta
Point Mugu, CA _ _ CS 1961 1970 At Naval Air Station, Pacific Missile Range,
Pt. Mugu, CA
Point St. George, CA T NYW DF 1938 Jun 1944 NAVRAD DF STA..Transferred to CG
Port Allen, Kauai, HI _ NZP DF May 1943 Jul 1945 May 1943  DF est. for tracking friendly acft.
Transferred to Coast Guard
Port Isabel, TX AZ NWJ DF Apr 1944 Feb 1945 SUPRADSTA..Transferred to CG
Port Lyautey,
    French Morocco		 _ NHY DF RI 1946 Dec 1953 At Naval Air Station. NCU 12 SUPRADGRP-
COMSUPACT/SUPRADSTA (NCF) -
NSGDept (NCS) - moved to Sidi Yahia
Poyners Hill, NC P NTP/NDX DF Dec 1939 Jul 1945 SUPRADSTA..Transferred to CG
Pyong Taek, Korea _ NLS/(NDT-?) DF RI 1 Mar 1972 11 Dec 1993 NSGDet. NSGA est 13 June 1980. At
Camp Humphreys, Zoekler Station,
Anjong Ri, Pyong Taek, Republic of Korea
Ramasun, Thailand _ none DF Jan 1971 5 May 1976 NSGDet - at 7th RRFS, Ramasun Station,
Thailand. During Vietnam war
Recife, Pina, Brazil AR NZX/NKM/BZ2 DF RI (Jul 1943) 31 Dec 1956 (Jul 1943)   SUPRADSTA
NCU-33. transferred to Brazilian Navy
Richmond, FL _ NMA DF ( < 1955) Jul 1957 NSGA at USCG RADSTA Miami.
Transferred to Homestead
Rio Grande de Sul, Brazil _ NQZ DF Not Established n/a _
Roosevelt Roads, PR _ _ CS 15 May 1972 31 Jul 1974 COMSEC 208 - Moved from Sabana Seca on
12 May 1972. It was officially established on
15 May 1972. COMSEC 208 was initially located
on Cabras (Goat) Island. Then at Puerca Point.
Rota, Spain _ AOK CS DS 1 Jun 1963 30 Sep 2006 COMSEC 602. NSGDept. Then NSGA in 1993.
Then NSGDet 6 Jun 2005.
Disest NSGDet 30 Sep 2006
Sabana Seca, PR _ NAU DF CS Jan 1952 31 Jan 03 NRS(R)/NSGDet/NSGDept.NSGA on 1 July 1971.
COMSEC 208 transferred to Roosevelt Roads
12 May 72.
Sakata, Japan _ _ RI EL Nov 1956 7 Sep 1962 NSGDet    Nov 1956 - 26 June 1957
NSGA    26 June 1957 - 7 Sep 1962
Station fully closed in Oct 1962.
Van/Site also operated on Mt Chokai.
Samoa, Vaitogi, USA V NIR DF Oct 1939 Dec 1948 Tutuila Island..COMSUPACT.
DAB installed 1943.
San Antonio, TX _ _ _ Jan 1970 Dec 1970 NSGDet at Lackland AFB Annex
San Antonio, TX _ _ _ ? Active former NAVINFOWARDET SAN ANTONIO
On 03 Oct 2005 renamed as
NAVIODET SAN ANTONIO TX
San Diego, CA _ _ _ 1 Oct 1998 27 Jul 2005 NSGA at NAS North Island.
Former NSGDept at Imperial Beach, CA
NSGA disest 27 Jul 2005.
Became part of combined
command NIOC San Diego
Sangley Pt, PI _ NPO RI CS Jun 1954 Feb 1958 NCF - Former NSGDept. COMSEC #703
Closed the doors Feb 1958.
Moved to San Miguel
San Juan/Carolina, PR O NFF/NAU DF RI 1938 1952 COMSUPACT/NRS - DF est. 1938 and
RI est. Jan 1940.
At San Geronimo. DF to Cabo Rojo in 1942.
Jan 1943  Caribbean net control est.
Transferred to Sabana Seca
San Miguel, PI _ NPO DF RI CS 1956 Dec 1975 NCF - NCS/NSGDept. COMSEC 703.
COMSEC 703 moved to Subic Bay in Mar 1970
DF/RI moved to Clark AB Mar 1966
Santos, Brazil _ NUX DF Not Established n/a _
San Vito dei Normanni,
    Brindisi, Italy		 _ NSV DF 23 Sep 1964 6 Jan 1993 NSGA at USAF Air Station
Sasebo, Japan _ NDT6/
NDT3/NDT10		 DF Dec 1957 Jul 1967 NSGDet
Seawall, ME W[1] NQC DF Sep 1942 1951 Sep 1942  DAJ HFDF est.
Equipment Research Station
located near the town of Manset, ME.
Seoul, Korea _ _ DS 1 Oct 1997 Active NSGDet till 30 Sep 2005.
On 03 Oct 2005 renamed as
NAVIODET SEOUL KOR
Admin for SUSLAK.
Shanghai, China A _ RI Mar 1924 Mar 1927 1924 at US Consulate
Moved to Station Ship
Shanghai Station Ship _ _ RI 1927 Mar 1929 1929 RI moved to Guam
Shanghai, China A _ DF RI Jul 1935 Dec 1940 4th Marine Reg/DT installed summer 1939
Moved to Corregidor Dec. 1940
Shemya, AK _ _ _ 1963 >1968 First (TAD) NSG Det in 1963. Then fulltime
NSGDet in 1965. POIC/CPOIC - Det out of Adak.
Located with 5073rd Air Base Squadron (AAC)
Shemya, AK.
Shemya, AK _ _ _ 22 Nov 1991 * Originally named NSGSD Shemya.
It was converted to NSGSD 3 in 1993 when
the Parent Command chose to re-name all
detachments to align with the Fleet
numbering system (even numbers for LANT,
odd for PAC). Somewhere around 1996 this
detachment was combined with NSGSD 7 and
was re-named NSGSD 7 FWD (forward deployed).
Sidi Yahia, Morocco _ NHY/CNL DF RI Dec 1953 Dec 1976 Former NSGDept at NavCommSta.
RI/DF terminated as of Aug 1972.
All NSG departed May 1975
Sinop, Turkey _ ( TCX ) _ 12 May 1961 18 Sep 1992 NavDet, Tuslog Det-4. (May 1961 - Jul 1975)..
Suspended Ops (Jul 1975 - Jan 1979)..
Tuslog Det-28, Sinop commissioned 16 Jan 1979.
On 1 Oct 1982, Tuslog Det-28 was redesignated as
US Naval Field Station; and, remained so until
decommissioning on 18 Sep 1992.
Sitka, AK AE NHF DF Sep 1941 Jul 1944 NAVRAD DF STA..Transferred to CG
Skaggs Island, CA T NAP/NPG/NPG6 DF RI CS 9 Mar 1942 18 Jun 1993 COMSUPACT    9 Mar 1942 - (1950)
NAVRADSTA(R)(S)    (1950) - 1953
NSGDept NCS SFRAN/NRS(R)    1953 - 30 Jun 1962
NSGA    1 July 1962 - 18 June 1993
Sep 1944   RI station est.
CS #102. W.Coast Equip Research Stn
Souda Bay, Crete _ _ _ Oct 1999 30 Sep 2006 NSGDet .. Det of NSGA Rota
South San Francisco, CA Y _ DF Jun 1942 Mar 1943 Moved to Castroville
Subic Bay, PI _ _ CS DS FES Mar 1970 18 May 1992 COMSEC 703. NSGDet Mar 1970..
COMSEC 703 was Det. of NCS NSGDept.
San Miguel, with ops van on hill above Cubi Pt. NAS.
Upgraded to NSGA 28 Oct 1991
Sugar Grove, WV _ _ _ 1 Dec 1968 1 Sep 2015 NRS[R]/NSGDet 01 Dec 1968 - 30 Sep 1992
NSGA 01 Oct 1992 - 30 Sep 2005
NIOC 01 Oct 2005 - 01 Sep 2015
Wullenweber Antennas 1 and 2
were completed on 6 Nov 1968.
These were General Service CDAAs for
NAVRADSTA(R). Not for NSG use and did not have
goniometers for HFDF.
On 01 Oct 2005 renamed as
NAVIOCOM SUGAR GROVE WV
Disestablished 01 Sep 2015
Suitland, MD _ _ _ Jul 1994 Active Former NAVINFOWARACT FORT MEADE MD
On 03 Oct 2005 renamed as NAVIOCOM SUITLAND MD
SUSLAK, Korea _ _ _ (1950) Active Ops at Yongsan and Pang-gyo
Taipei/Shu Lin Kou,
    Taiwan		 _ NTT _ Feb 1955 2 Feb 1979 NSG Det Feb 1955-Jun 1957
NSGA Jun 1957-Feb 1979
Tarawa, Gilbert Islands AN NWN DF 13 Dec 1943 27 Nov 1944 Moved to Iwo Jima
Todendorf, Germany _ none RI EI 20 Jul 1956 15 May 1976 NSGDept (Dept Head)  20 July 1956 - 1 May 1958
NSGDet (OIC)  1 May 1958 - 1 July 1960
NSGA (OIC)  1 July 1960 - 13 April 1968
NSGA (CO)  13 April 1968 - 15 May 1976
Van operated on Fehmarn Island 1957-1962,
and later from Dahme, Germany.
Camp Todendorf 54:22N 10:33E
Tokyo, Japan _ NDT _ _ 1954 NCU 38 - moved to Yokosuka
Tokyo, Japan _ NDT _ 1957 1959 NCU 38 - Far East Command support
Toro Point, Panama U NQB DF Dec 1940 Dec 1952 NCS - COMSUPACT
NCU-36    1950 - Dec 1952
Transferred to Galeta Island
Trinidad AC NGC/NYS DF Jan 1943 Jul 1945 Jul 1945  Transferred to CG
Later reopened by USN.  NCU 41 in 1952,
with final disest. date unknown.
Tsing-tao, China _ _ _ 1947 Apr 1949 NCU-36. Commanded by a Chief in Charge.
Umnak, Otter Pt, AK K NHG DF Jul 1943 Aug 1945 SUPRADSTA
Wahiawa, Oahu, HI H NIT/NPM DF RI CS Jan 1942 23 Jun 1998 Mar 1942  DF moved from Lualualei.
Dec 1942  Navy acquired FCC Wahiawa Sta.
1 Jan 1947 COMSUPACT (NIT)
COMSECACT (NPM1).CS #101 NRS.
NSGDept. - Msn ceased 20 Apr 1998.
CDAA removed Sep 2007.
Wailupe, Oahu, HI H NIT/NPM RI 1925 1928 Naval Radio Receiving and Control Station
Wailupe, Oahu, HI H NIT/NPM DF Jun 1931 1939 DF Moved to Lualualei
Wailupe, Oahu, HI H NIT/NPM RI Jun 1931 Jul 1933 RI Moved to Heeia
Wakkanai, Japan _ _ R/T 1952 >1990 First Det established in early 1952 thru late 1952.
It was located at Detachment 12, 1st Radio
Squadron Mobile at Wakkanai Air Station.
Later NSGDet(s) also at Wakkanai Air Base.
Washington DC N _ RI AN 1920's Feb 1943 Predecessor unit est. early 1920s as DNC Op-20-G.
At Main Navy, 18th St. & Constitution Ave.
Oct. 1917 - 11 March 1935 Code and Signal Section
11 March 1935 - 15 March 1939 Communication Security Group
15 March 1939 - 1 Oct. 1939 Radio Intelligence Section
Oct. 1939 - Communication Security Section
Feb 1943 moved to 3801 Nebraska Ave., Washington, DC
See NAVSECSTA in Notes below
Washington DC N NEK _ Feb 1943 16 Nov 1998 NAVSECSTA - See NOTES below - NSGA
Washington DC _ _ _ Sep 1995 30 Sep 2006 NSGComDet Potomac Sep 1995..
NSGComDet Washington,DC..
NSGDet Washington, DC 1999
at Anacostia Annex, DC.
Moved to Naval Research Laboratory,
Washington, DC in 2002.
On 03 Oct 2005 renamed as
NAVIODET WASHINGTON DC
Whidbey Island, WA _ _ DS 1 Oct 1996 Active NSGA .. at NAS
On 03 Oct 2005 renamed as
NAVIOCOM WHIDBEY ISLAND WA
Winter Harbor, ME W NQC DF RI CS 28 Feb 1935 30 Jun 2002 USN RDF STA  Feb 1935 - Feb 1944
SUPRADSTA   Feb 1944 - Jan 1950
NAVRADSTA (R)   Jan 1950 - Jun 1958
NSGA   9 June 1958 - 30 June 2002.
(COMSEC 206)
Jun 1942   DAB HFDF installed.
Components at Corea (DF) and Bass Harbor.
DF closed 1998. CDAA dismantled Aug 2001.
Closing ceremonies held on May 17, 2002.
Winter Harbor, ME _ _ _ May 1988 30 Jun 2002 Originally named NSGSA Det Winter Harbor.
Then NSGSD Winter Harbor, then NSGSD 2
(NSGSuppDet TWO). This detachment
relocated to Northwest, VA when Winter Harbor
was Disestablished in 2002.
Yakima, WA _ _ _ Oct 1971 Active NSGDet at U.S. Army Yakima Research Station
On 03 Oct 2005 renamed as
NAVIODET YAKIMA WA
Yokosuka, Japan _ NDT/NTO DF RI CS 22 Apr 1946 Active Moved from Ominato, Japan
22 Apr 1946 - Aug 1948 COMSUPACT Det.;
Aug 1948 - 22 Nov 1948 COMSUPACT;
22 Nov 1948 - 29 Dec 1950 COMMUNIT 35;
29 Dec 1950 - 12 Dec 1952 NCF/NRF(S);

1954 NCU-38 moved from Tokyo;
COMSEC 702 Sep/Oct 1962 - ?.
COMNAVFE support

1 Aug 1969 - 1 Jun 1995 NSG Det.;
1 Jun 1995 - 30 Sep 2005 NSGA.
On 03 Oct 2005 renamed as
NAVIOCOM YOKOSUKA JA

Legends:
  *   - These stations are Disestablished, but the date is unknown.
(      ) - Data in parens "(      )" is unconfirmed.
AN - Analysis
CS - COMSEC
DS - DIRSUP
FES - Fleet Electronic Support Shop
Notes - School Commands:

Training of special Navy and Marine Corps radio operators was conducted in a reinforced concrete
blockhouse on the roof of the sixth wing of the old Main Navy Building on Constitution Ave., Washington, DC
commencing in 1926 and continuing into 1941. The 26+ classes trained in Japanese radio code were known
as the "On the Roof Gang." This training was transferred to Bainbridge Island, Washington in 1941 where
it continued for the duration of WW II.

The CT SUPP school was established at Bainbridge Island, WA in October 1951 and was closed in December 1953.
CT SUPP schools at Bainbridge Island, WA and Imperial Beach, CA were in business at the same time;
but, after Bainbridge Island, WA was closed, only Imperial Beach, CA continued, until it was moved to Pensacola, FL in 1960.

The history of Imperial Beach, CA says: BUPERS established
"U.S. Naval School, Communications Technician, Class A", on October 1, 1949.
On July 1, 1957, NAVCOMMTRACEN was established at Imperial Beach, CA and took over existing schools.
SUPP Scol NAVCOMMTRACEN moved from IB and became NAVCOMMTRACEN Corry Field, Pensacola in March 1960;
later, in 1973, CNO changed the name of Corry Field to NTTC Corry Station, Pensacola;
then on 19 Nov 2002, CNO changed the name of Corry Station to Center for Cryptology, Corry Station, Penacola
with a PLA of "CENCRYPTOLOGY Corry Station, Pensacola, FL".
Then on 28 June 2005, the name was changed to Center for Information Dominance, Corry Station, Pensacola
with a PLA of "CENINFODOM CORRY STATION PENSACOLA FL".
(No connection with NSGA Pensacola, as it remains today).

NCTC was a BUPERS shore activity at IB, not connected with the CI station there.
NCTC from IB to NCTC Pensacola was a BUPER's activity move and not connected with NSGA Pensacola.

Notes - Washington DC. NAVSECSTA (3801 Nebraska Ave., NW):

Washington DC. NAVSECSTA (3801 Nebraska Ave., NW) formerly the
Naval Communications Supplementary Annex (aka Naval Communications Annex)(2-43),
renamed NAVCOMMSTA Washington on 7-7-48, renamed Navy Security Station on 9-21-50.

10 Jul. 1946 Communications Supplementary Activities established.
28 Jan. 1950 Communications Supplementary Activities renamed Navy Security
Group under Op-202, Security Branch, Naval Communications Division.
l June 1954 Op-202 redesignated Op-302
3 Jan. 1955 Op-302 redesignated Op-30G Naval Security Group
5 May 1959 Op-30G redesignated Op-94G Naval Security Group
7 July 1961 Naval Security Group Headquarters established
l July 1968 Naval Security Group Command established
15 March 1971 Op-94G resdesignated Op-944 Signals Exploitation and Security
Division. Its director was also Commander, Naval Security Group Command.

NAVSECGRUCOM HQ moved from NAVSECSTA to Fort Meade in 11-95. NAVSECSTA
was not officially disestablished until 10-16-98, almost three years
after the last NAVSECGRU office had moved. The site is now the new
(2003) home of the Department of Homeland Security.

The Director, Communications Security Material System remains at the
Nebraska Avenue Complex, with detachments at Norfolk, Camp LeJeune, and Groton.

Notes - Shanghai was active for several periods including:

Station A Peiping RI established 1927; closed and transferred to Shanghai July 1935 as Station A.
Station A Shanghai established 1924; closed Dec. 1940.
Shanghai Station transferred to Station Ship Shanghai in 1927; disestablished March 1929.
This was probably USS MONOCACY (PG 20, reclassified as PR 4 on 15 June 1928).
Radio Security Station 4th Marine Regiment 1924-1929, 1935-40.

Notes - Pearl Harbor:

The Hawaiian Decrypting Unit/Communication Inelligence Unit was established in 1938 in the Navy Yard
administration building. On Dec. 1, 1941 the Communication Intelligence Unit moved from the second floor
of the admin building to a new basement room in the same building and its name was changed to
Combat Intelligence Unit in the same month and later changed to Fleet Radio Unit Pacific (FRUPAC).
In April 1943 FRUPAC moved from the Navy Yard into a new two-story building at Makalapa, next to
the headquarters of CINCPAC, where it remainded for the duration of WW II. It later became known as
NAVSECGRUPAC and was located on the fourth floor of the now COMPACFLT headquarters building at Makalapa.



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