Naval Station Pearl Harbor Naval Station Pearl Harbor is a United States military facility adjacent to Honolulu , Hawaii . In 2010 , along with the United States Air Force ' s Hickam Air Force Base , the facility was merged to form Joint Base Pearl Harbor - Hickam Pearl Harbor is the headquarters of the United States Pacific Fleet . The attack on Pearl Harbor by the Empire of Japan on Sunday , 7 December 1941 brought the United States into World War II . Overview . Naval Station Pearl Harbor provides berthing and shore side support to surface ships and submarines , as well as maintenance and training . Pearl Harbor can accommodate the largest ships in the fleet , to include dry dock services , and is now home to over 160 commands . Housing , personnel , and family support are also provided and are an integral part of the shore side activities , which encompasses both permanent and transient personnel . Because Pearl Harbor is the only intermediate maintenance facility for submarines in the Middle Pacific , it serves as host to a large number of visiting submariners . The Naval Computer and Telecommunications Area Master Station , Pacific , ( NCTAMS PAC ) , Wahiawa , Hawaii is the world ' s largest communication station . The headquarters site of this shore command is located in the central section of the island of Oahu , approximately three miles north of Wahiawa . History . 1899 – 1941 . Following the annexation of Hawaii , Pearl Harbor was refitted to allow for more navy ships . In May 1899 , Commander F . Merry was made naval representative with authority to transact business for the Navy Department and its Bureaus . He immediately assumed control of the Coal Depot and its equipment . To supplement his facilities , he was assigned the Navy tug and two coal barges . Inquiries that commenced in June culminated in the establishment of the " Naval Station , Honolulu " on 17 November 1899 . On 2 February 1900 , this title was changed to " Naval Station , Hawaii . " The creation of the Naval Station allowed the Navy Department to explore territorial outposts . In October 1899 , and " Iroquois " made extensive surveys and sounding of the waterways to Midway and Guam . One of the reasons for these explorations was to select a possible cable route to Luzon . A coal famine and an outbreak of the bubonic plague were the only two incidents that hindered the Commandant from fulfilling his duties . Because of the severe coal shortage in September 1899 , the Commandant sold coal to the Oahu Railway and Land Company and the Inter - Island Steam Navigation Company , Ltd . Although this indicated the affinity of economic ties with the Navy , it was to a certain extent counteracted by the quarantine of the naval establishment from December 1899 – February 1900 , because of the bubonic plague . Approximately 61 deaths were recorded in Honolulu for this period . Work was consequently delayed on nascent Navy projects in Honolulu Harbor . From 1900 – 1908 , the Navy devoted its time to improving the facilities of the that constituted the naval reservation in Honolulu . Under the Appropriation Act of 3 March 1901 , this tract of land was improved with the erection of additional sheds and housing . Improvements included a machine shop , smithery and foundry , Commandant ' s house and stables , cottage for the watchman , fencing , 10 - ton wharf crane , and water - pipe system . The harbor was dredged and the channel enlarged to accommodate larger ships . On 28 May 1903 , the first battleship , , entered the harbor for coal and water . However , when the vessels of the Asiatic station visited Honolulu in January 1904 , Rear Admiral Silas Terry complained that they were inadequately accommodated with dockage and water . Under the above Appropriation Act , Congress approved the acquisition of lands for the development of a naval station at Pearl Harbor and the improvement of the channel to the Lochs . The Commandant , under the direction of the Bureau of Equipment , attempted to obtain options on lands surrounding Pearl Harbor that were recommended for naval use . This endeavor was unsuccessful when the owners of the property refused to accept what was deemed to be a fair price . Condemnation proceedings , under the Hawaiian law of eminent domain , were begun on 6 July 1901 . The land acquired by this suit included the present Navy Yard , Kauhua Island , and a strip on the southeast coast of Ford Island . The work of dredging the coral reef that blocked Pearl Harbor progressed rapidly enough to allow the gunboat to proceed to the upper part of Main Loch in January 1905 . One of the early concerns of the growing station was that the Army would make claims on its property . Because of their facilities , as wharves , cranes , artesian wells , and coal supplies , many requests were made by the Army for their use . By February 1901 , the Army had made application for the privilege of establishing on Navy docks movable cranes for handling coal and other stores , a saluting battery and a flag staff on the naval reservation , and an artesian well of its own . All these requests were rejected by the Bureau of Equipment on the theory that , once granted , they " will practically constitute a permanent foothold on the property , and end in dividing it between the two Departments , or in the entire exclusion of the Navy Department on the ground of military expediency as established by frequency of use . " However , the Army Depot Quartermaster at Honolulu contracted for the sinking of an artesian well on the Naval Station with the Commandant ' s approval , who , in turn , acted on a recommendation of the Bureau of Yards and Docks . The flow of water obtained amounted to over 1 . 5 million gallons per day , sufficient for all purposes of the Army and Navy . The Bureau of Equipment felt that its word of caution was justified when the Depot Quartermaster in 1902 let it be known that any water used by the Navy from the artesian well was " only given by courtesy of the Army . " Despite the warnings of the Bureau of Equipment , the War Department , the Department of Labor and Commerce , and the Department of Agriculture had secured permission to settle on the naval reservation . By 1906 , the Commandant believed that it was necessary for the Bureau of Yards and Docks to develop a policy on the future of the station . The docks were being used to a greater extent by the Army transports , than by Navy ships , and the Army was actually attempting to get possession of Quarantine Wharf ( which was built by the Territorial Government on the Naval Reservation , with the understanding that it could be taken over at any time by the Navy Department upon the payment of its appraised value . ) In 1903 , the Department of Labor and Commerce received about for an Immigration Station . The Department of Agriculture had , in the meanwhile , secured part of the site intended for a hospital as an experimental station . The Commandant felt that , if the station was going to develop beyond a mere coaling depot , these territorial encroachments on the part of other departments should be stopped , particularly when they were enjoying the benefits of naval appropriations . " On the other hand , " he wrote , " if it is the intention to improve Pearl Harbor and eventually abandon this station every effort should be made to begin work there as soon as possible . . . I am informed that important commercial interests will make a strong effort next year to have Pearl Harbor improved , and I think that will be an opportune time for the Navy Department to make efforts in the same direction . " In 1908 , the Pearl Harbor Naval Shipyard was established . The period from 1908 – 1919 was one of steady and continuous growth of the Naval Station , Pearl Harbor , with the exception of the discouraging collapse of the drydock in 1913 . The Act of 13 May 1908 authorized the enlargement and dredging of the Pearl Harbor channel and lochs " to admit the largest ships , " the building of shops and supply houses for the Navy Yard , and the construction of a drydock . Work on the dock started on 21 September 1909 . In April 1910 , the barquentine " Amaranth " became the fourth deep - sea , cargo - carrying vessel to venture into the newly dredged harbor , having been preceded by the three - masted schooner " W . H . Marston " on 8 March , and the schooner " Ariel " and bark " Marston " a few days later . " Amaranth " delivered materials for construction of the dry dock facility . Work progressed satisfactorily on all projects , except the drydock . After much wrangling with Congress to secure an appropriation of over three million dollars for its construction , the drydock was wrecked by " underground pressure . " " On February 17 , 1913 , the entire drydock structure rumbled , rocked , and caved in . " The drydock was ceremonially opened to flooding on 21 August 1919 , by Mrs . Josephus Daniels , wife of the Secretary of the Navy . In 1917 , Ford Island in the middle of Pearl Harbor was purchased for joint Army and Navy use in the development of military aviation in the Pacific . As the Japanese military pressed its war in China , concern over Japan ' s intentions caused the U . S . to begin taking defensive measures . On 1 February 1933 , the U . S . Navy staged a mock attack on the base at Pearl Harbor as part of a preparedness exercise . The attack " succeeded " and the defense was deemed a " failure " . The actual attack on Pearl Harbor by the Empire of Japan on 7 December 1941 brought the United States into World War II . Sunday , 7 December 1941 . Aircraft and midget submarines of the Imperial Japanese Navy began an attack on the U . S naval base . Through earlier code breaking activity , the Americans had determined that an attack was likely to occur . However , while the Americans failed to discover Japan ' s target location , it was believed that the Philippines was the most likely target . Under the command of Admiral Chuichi Nagumo , the attack was devastating in loss of life and damage to the U . S . fleet . At 06 : 05 on 7 December , the six Japanese carriers launched a first wave of 183 aircraft composed mainly of dive bombers , horizontal bombers and fighters . The Japanese hit American ships and military installations at 07 : 51 . The first wave attacked military airfields of Ford Island . At 08 : 30 , a second wave of 170 Japanese aircraft , mostly torpedo bombers , attacked the fleet anchored in Pearl Harbor . The battleship was hit with an armor - piercing bomb which penetrated the forward ammunition compartment , blowing the ship apart and sinking it within seconds . It was one of eight US battleships at the dock , five of which were sunk and the remaining three were badly damaged . Overall , 9 ships of the U . S . fleet were sunk and 21 ships were severely damaged . 3 of the 21 would be irreparable . The overall death toll reached 2 , 402 and 1 , 282 wounded , including 68 civilians . Of the military personnel lost at Pearl Harbor , 1 , 177 were from the " Arizona " . The first shots fired were from the destroyer on a midget submarine that surfaced outside of Pearl Harbor ; " Ward " sank the midget sub at approximately 06 : 55 , about an hour before the attack on Pearl Harbor . Japan would lose 29 out of the 350 aircraft they attacked with . West Loch Explosion , 1944 . Just after 3pm on Sunday 21 May 1944 an explosion in a staging area for Landing Ships , Tank ( LSTs ) and other amphibious assault ship s in West Loch leading to a fire which quickly spread among the ships being prepared for Operation Forager , the invasion of the Japanese - held Mariana Islands . Over the next 24 hours , six LSTs sank , 163 naval personnel died and 396 were injured . A subsequent Naval Board of Inquiry never determined the exact cause of the disaster . But it concluded the initial explosion was caused when a mortar round aboard detonated during an unloading operation because it was either dropped or went off when gasoline vapours ignited . The incident – together with the Port Chicago disaster two months later – led to major changes in weapon handling practices within the United States Navy . Postwar years . Over the years , Pearl Harbor remained a main base for the US Pacific Fleet after World War II along with Naval Base San Diego . In 2010 , the Navy and the Air Force merged their two nearby bases ; Pearl Harbor joined with Hickham Air Force Base to create Joint Base Pearl Harbor - Hickam . National Historic Landmark . The Navy base itself was recognized on 29 January 1964 as a National Historic Landmark district and with the National Register of Historic Places since 1976 . Within its bounds , it contains several other National Historic Landmarks associated with the attack on Pearl Harbor , including the " Arizona " , , and . As an active Navy base , many of the historic buildings that contributed to the NHL designation are under threat of demolition and rebuilding . Vessels . Surface ships presently homeported . s = 7 Destroyers s = 3 Cruisers s = 1 Frigates Submarines presently homeported . s = 12 s = 2 As part of the 2006 Quadrennial Defense Review , the Navy announced in early 2006 that it would shift 60 % of its attack submarines to the Pacific by 2010 . USS " Missouri " . ( " Mighty Mo " or " Big Mo " ) is a United States Navy , and was the fourth ship of the U . S . Navy to be named in honor of the U . S . state of Missouri . " Missouri " was the last battleship built by the United States , and was the site of the surrender of the Empire of Japan which ended World War II . " Missouri " was ordered in 1940 and commissioned in June 1944 . In the Pacific Theater of World War II she fought in the battles of Iwo Jima and Okinawa and shelled the Japanese home islands , and she fought in the Korean War from 1950 to 1953 . She was decommissioned in 1955 into the United States Navy reserve fleets ( the " Mothball Fleet " ) , but reactivated and modernized in 1984 as part of the 600 - ship Navy plan , and provided fire support during Operation Desert Storm in January / February 1991 . " Missouri " received a total of 11 battle star s for service in World War II , Korea , and the Persian Gulf , and was finally decommissioned on 31 March 1992 , but remained on the Naval Vessel Register until her name was struck in January 1995 . In 1998 , she was donated to the USS " Missouri " Memorial Association and became a museum ship at Pearl Harbor , Hawaii .