USS San Pablo (AVP-30)
Encyclopedia

USS San Pablo (AVP-30) was a United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 Barnegat-class
Barnegat class seaplane tender
|The Barnegat class was a large class of United States Navy small seaplane tenders built during World War II. Thirty were completed as seaplane tenders, four as motor torpedo boat tenders, and one as a catapult training ship.-Design:...

 seaplane tender
Seaplane tender
A seaplane tender is a ship that provides facilities for operating seaplanes. These ships were the first aircraft carriers and appeared just before the First World War.-History:...

 which was in commission as such from 1943 to 1947 and then served as a commissioned hydrographic
Hydrography
Hydrography is the measurement of the depths, the tides and currents of a body of water and establishment of the sea, river or lake bed topography and morphology. Normally and historically for the purpose of charting a body of water for the safe navigation of shipping...

 survey ship, redesignated AGS-30, from 1948 to 1969. Thus far, she has been the only ship of the United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 to be named for San Pablo Bay
San Pablo Bay
San Pablo Bay is a tidal estuary that forms the northern extension of San Francisco Bay in northern California in the United States. Most of the Bay is shallow; however, there is a deep water channel approximately in mid bay, which allows access to Sacramento, Stockton, Benicia, Martinez, and...

, a shallow northern extension of San Francisco Bay
San Francisco Bay
San Francisco Bay is a shallow, productive estuary through which water draining from approximately forty percent of California, flowing in the Sacramento and San Joaquin rivers from the Sierra Nevada mountains, enters the Pacific Ocean...

 in California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

.

Construction and commissioning

San Pablo was laid down on 2 July 1941 by Associated Shipbuilders, Inc. of Seattle
Seattle, Washington
Seattle is the county seat of King County, Washington. With 608,660 residents as of the 2010 Census, Seattle is the largest city in the Northwestern United States. The Seattle metropolitan area of about 3.4 million inhabitants is the 15th largest metropolitan area in the country...

, Washington. She was launched
Ship naming and launching
The ceremonies involved in naming and launching naval ships are based in traditions thousands of years old.-Methods of launch:There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching." The oldest, most familiar, and most widely...

 on 31 March 1942, sponsored by Mrs. W. A. Hall, and commissioned
Ship commissioning
Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to the placing of a warship in active duty with its country's military...

 on 15 March 1943 with Commander
Commander
Commander is a naval rank which is also sometimes used as a military title depending on the individual customs of a given military service. Commander is also used as a rank or title in some organizations outside of the armed forces, particularly in police and law enforcement.-Commander as a naval...

 R. R. Darron in command.

Following final fitting out, San Pablo conducted shakedown
Shakedown (testing)
A shakedown is a period of testing or a trial journey undergone by a ship, aircraft or other craft and its crew before being declared operational. Statistically, a proportion of the components will fail after a relatively short period of use, and those that survive this period can be expected to...

 in the Puget Sound
Puget Sound
Puget Sound is a sound in the U.S. state of Washington. It is a complex estuarine system of interconnected marine waterways and basins, with one major and one minor connection to the Strait of Juan de Fuca and the Pacific Ocean — Admiralty Inlet being the major connection and...

 area and then steamed to San Diego
San Diego, California
San Diego is the eighth-largest city in the United States and second-largest city in California. The city is located on the coast of the Pacific Ocean in Southern California, immediately adjacent to the Mexican border. The birthplace of California, San Diego is known for its mild year-round...

, California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 for readiness training.

Operations at New Caledonia

On 15 June 1943, San Pablo departed the United States West Coast and headed for the South Pacific Ocean. She embarked United States Marine Corps
United States Marine Corps
The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

 personnel and deck cargo at Espiritu Santo
Espiritu Santo
Espiritu Santo is the largest island in the nation of Vanuatu, with an area of . It belongs to the archipelago of the New Hebrides in the Pacific region of Melanesia. It is in the Sanma Province of Vanuatu....

, then proceeded to Nouméa, New Caledonia
New Caledonia
New Caledonia is a special collectivity of France located in the southwest Pacific Ocean, east of Australia and about from Metropolitan France. The archipelago, part of the Melanesia subregion, includes the main island of Grande Terre, the Loyalty Islands, the Belep archipelago, the Isle of...

. After offloading there, she went to Brisbane, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, to pick up the flight crews and aviation supplies, including spare parts and fuel, of Patrol Squadron 101 (VP-101), then returned to Nouméa to commence operations as tender and base for Martin
Glenn L. Martin Company
The Glenn L. Martin Company was an American aircraft and aerospace manufacturing company that was founded by the aviation pioneer Glenn L. Martin. The Martin Company produced many important aircraft for the defense of the United States and its allies, especially during World War II and the Cold War...

 PBM Mariner
PBM Mariner
The Martin PBM Mariner was a patrol bomber flying boat of World War II and the early Cold War period. It was designed to complement the PBY Catalina in service. A total of 1,366 were built, with the first example flying on 18 February 1939 and the type entering service in September 1940.-Design and...

 and Consolidated
Consolidated Aircraft
The Consolidated Aircraft Corporation was founded in 1923 by Reuben H. Fleet, the result of the Gallaudet Aircraft Company's liquidation and Fleet's purchase of designs from the Dayton-Wright Company as the subsidiary was being closed by its parent corporation, General Motors. Consolidated became...

 PBY Catalina
PBY Catalina
The Consolidated PBY Catalina was an American flying boat of the 1930s and 1940s produced by Consolidated Aircraft. It was one of the most widely used multi-role aircraft of World War II. PBYs served with every branch of the United States Armed Forces and in the air forces and navies of many other...

 flying boat
Flying boat
A flying boat is a fixed-winged seaplane with a hull, allowing it to land on water. It differs from a float plane as it uses a purpose-designed fuselage which can float, granting the aircraft buoyancy. Flying boats may be stabilized by under-wing floats or by wing-like projections from the fuselage...

s conducting "Black Cat" night-fighting, air-search, and reconnaissance
Reconnaissance
Reconnaissance is the military term for exploring beyond the area occupied by friendly forces to gain information about enemy forces or features of the environment....

 missions.

With VP-101 and assigned crash boats, San Pablo formed Task Group 73.1 and established a seaplane
Seaplane
A seaplane is a fixed-wing aircraft capable of taking off and landing on water. Seaplanes that can also take off and land on airfields are a subclass called amphibian aircraft...

 base by charting the bay
Bay
A bay is an area of water mostly surrounded by land. Bays generally have calmer waters than the surrounding sea, due to the surrounding land blocking some waves and often reducing winds. Bays also exist as an inlet in a lake or pond. A large bay may be called a gulf, a sea, a sound, or a bight...

, setting out mooring and marker buoy
Buoy
A buoy is a floating device that can have many different purposes. It can be anchored or allowed to drift. The word, of Old French or Middle Dutch origin, is now most commonly in UK English, although some orthoepists have traditionally prescribed the pronunciation...

s, and constructing quarters for squadron personnel at nearby Honey Hollow. They also built an advanced base at Samarai
Samarai
Samarai is an island and former administrative capital in Milne Bay Province, Papua New Guinea. Located off the south-eastern tip of New Guinea in the China Strait Samarai has an area of just ....

 in Papua New Guinea
Papua New Guinea
Papua New Guinea , officially the Independent State of Papua New Guinea, is a country in Oceania, occupying the eastern half of the island of New Guinea and numerous offshore islands...

. For the next several months, the "Black Cats" operated from these bases, attacking on Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese shipping along the coasts of New Guinea
New Guinea
New Guinea is the world's second largest island, after Greenland, covering a land area of 786,000 km2. Located in the southwest Pacific Ocean, it lies geographically to the east of the Malay Archipelago, with which it is sometimes included as part of a greater Indo-Australian Archipelago...

, New Britain
New Britain
New Britain, or Niu Briten, is the largest island in the Bismarck Archipelago of Papua New Guinea. It is separated from the island of New Guinea by the Dampier and Vitiaz Straits and from New Ireland by St. George's Channel...

, and New Ireland
New Ireland (island)
New Ireland is a large island in Papua New Guinea, approximately 7,404 km² in area. It is the largest island of the New Ireland Province, lying northeast of the island of New Britain. Both islands are part of the Bismarck Archipelago, named after Otto von Bismarck, and they are separated by...

, and in the Bismarck Sea
Bismarck Sea
The Bismarck Sea lies in the southwestern Pacific Ocean to the north of the island of Papua New Guinea and to the south of the Bismarck Archipelago and Admiralty Islands. Like the Bismarck archipelago, it is named in honour of the German chancellor Otto von Bismarck...

. They inflicted great losses on Japanese inter-island barge
Barge
A barge is a flat-bottomed boat, built mainly for river and canal transport of heavy goods. Some barges are not self-propelled and need to be towed by tugboats or pushed by towboats...

 traffic as well as to heavy shipping, harassed Japanese troops with night bombing and strafing
Strafing
Strafing is the practice of attacking ground targets from low-flying aircraft using aircraft-mounted automatic weapons. This means, that although ground attack using automatic weapons fire is very often accompanied with bombing or rocket fire, the term "strafing" does not specifically include the...

 missions; conducted photographic
Photography
Photography is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light-sensitive material such as photographic film...

 intelligence
Military intelligence
Military intelligence is a military discipline that exploits a number of information collection and analysis approaches to provide guidance and direction to commanders in support of their decisions....

 operations, provided at-sea search-and-rescue support for downed United States Army Air Forces
United States Army Air Forces
The United States Army Air Forces was the military aviation arm of the United States of America during and immediately after World War II, and the direct predecessor of the United States Air Force....

 fliers and sailors of sunken vessels, and carried high-ranking officers, Allied
Allies of World War II
The Allies of World War II were the countries that opposed the Axis powers during the Second World War . Former Axis states contributing to the Allied victory are not considered Allied states...

 coast watchers, and native guerrilla units. While continuously on the alert for enemy air attack, San Pablo sailors worked around the clock to fuel, repair, arm, and control the seaplanes and to feed and care for their crews. On 9 October 1943, San Pablo was relieved at Nouméa by seaplane tender USS Half Moon (AVP-26)
USS Half Moon (AVP-26)
USS Half Moon was a seaplane tender that served in the United States Navy from 1943 to 1946.-Construction and early deployment:Half Moon was laid down as a small seaplane tender on 10 March 1942 by Lake Washington Shipyards, Houghton, Washington, and was launched as such on 12 July 1942,...

 and sailed to Brisbane for long-needed repair, replenishment, and shore leave.

San Pablo returned to Nouméa on 20 December 1943 and resumed operations, this time with Patrol Squadron 52 (VP-52).

Operations in the New Guinea campaign

During January 1944, she gave direct support to the force which occupied Finschhafen
Finschhafen
Finschhafen is a district on the northeast coast of the Morobe province of Papua New Guinea. It is named after the port of the same name.The port was discovered in 1884 by the German researcher Otto Finsch. In 1885 the German colony of German New Guinea created a town on the site and named it...

, New Guinea, and helped to establish a new advance base at Langemak Bay
Langemak Bay
Langemak Bay is a bay north of Finschhafen, on the north east coast of Papua New Guinea. Langemak Bay saw extensive naval operations in World War II, including a landing beach at the western end of the bay for the embarkation of the 2/24th Australian Infantry Battalion....

, New Guinea. At times, she also tended the planes of Patrol Squadron 34 (VP-34), then flying rescue missions for the United States Army Air Forces Fifth Air Force
Fifth Air Force
The Fifth Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Yokota Air Base, Japan....

 from Port Moresby
Port Moresby
Port Moresby , or Pot Mosbi in Tok Pisin, is the capital and largest city of Papua New Guinea . It is located on the shores of the Gulf of Papua, on the southeastern coast of the island of New Guinea, which made it a prime objective for conquest by the Imperial Japanese forces during 1942–43...

, New Guinea. She once temporarily based two Vought
Vought
Vought is the name of several related aerospace firms. These have included, in the past, Lewis and Vought Corporation, Chance Vought, Vought Sikorsky, LTV Aerospace , Vought Aircraft Companies, and the current Vought Aircraft Industries. The first incarnation of Vought was established by Chance M...

 OS2U Kingfisher
OS2U Kingfisher
The Vought OS2U Kingfisher was an American catapult-launched observation floatplane. It was a compact mid-wing monoplane, with a large central float and small stabilizing floats. Performance was modest, because of its light engine...

 floatplane
Floatplane
A floatplane is a type of seaplane, with slender pontoons mounted under the fuselage; only the floats of a floatplane normally come into contact with water, with the fuselage remaining above water...

s from light cruiser
Light cruiser
A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

 USS Boise (CL-47)
USS Boise (CL-47)
USS Boise was a United States Navy Brooklyn-class light cruiser. The cruiser was named for Boise, the capital city of the state of Idaho....

. From Langemak Bay, San Pablos planes helped to prevent the Japanese from supplying their garrison
Garrison
Garrison is the collective term for a body of troops stationed in a particular location, originally to guard it, but now often simply using it as a home base....

s on Rabaul
Rabaul
Rabaul is a township in East New Britain province, Papua New Guinea. The town was the provincial capital and most important settlement in the province until it was destroyed in 1994 by falling ash of a volcanic eruption. During the eruption, ash was sent thousands of metres into the air and the...

 and Kavieng
Kavieng
Kavieng is the capital of the Papua New Guinean province of New Ireland and the largest town on the island of the same name. The town is located at Balgai Bay, on the northern tip of the island. As of 2000, it had a population of 10,600....

.

On 25 February 1944, relieved again by Half Moon, San Pablo returned to Nouméa for repairs by destroyer tender
Destroyer tender
A destroyer tender is a ship designed to provide maintenance support to a flotilla of destroyers or other small warships. The use of this class has faded from its peak in the first half of the 20th century as the roles of small combatants have evolved .Due to the increased size and automation of...

 Dobbin (AD-3)
USS Dobbin (AD-3)
USS Dobbin is the name of a United States Navy destroyer tender of World War II, named after James Cochrane Dobbin, the Secretary of the Navy from 1853 to 1857.The USS Dobbin was launched on 5 May 1921 by the Philadelphia Navy Yard...

. During the work, she assisted in removing a propeller
Propeller
A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and a fluid is accelerated behind the blade. Propeller dynamics can be modeled by both Bernoulli's...

 from destroyer
Destroyer
In naval terminology, a destroyer is a fast and maneuverable yet long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller, powerful, short-range attackers. Destroyers, originally called torpedo-boat destroyers in 1892, evolved from...

-minelayer
Minelayer
Minelaying is the act of deploying explosive mines. Historically this has been carried out by ships, submarines and aircraft. Additionally, since World War I the term minelayer refers specifically to a naval ship used for deploying naval mines...

 USS Aaron Ward (DM-34)
USS Aaron Ward (DM-34)
The third ship named USS Aaron Ward in honor of Rear Admiral Aaron Ward was a Robert H. Smith-class destroyer minelayer in the service of the United States Navy....

 using her seaplane winch
Winch
A winch is a mechanical device that is used to pull in or let out or otherwise adjust the "tension" of a rope or wire rope . In its simplest form it consists of a spool and attached hand crank. In larger forms, winches stand at the heart of machines as diverse as tow trucks, steam shovels and...

. This speeded repairs to Aaron Ward and allowed her to reach Ulithi Atoll in time to prepare for the forthcoming Okinawa campaign.

By 24 March 1944, San Pablo was conducting operations at Seeadler Harbor
Seeadler Harbor
Seeadler Harbor, also known as Port Seeadler, is located on Manus Island, Admiralty Islands, Papua New Guinea and played an important role in World War II...

 in the Admiralty Islands
Admiralty Islands
The Admiralty Islands are a group of eighteen islands in the Bismarck Archipelago, to the north of New Guinea in the south Pacific Ocean. These are also sometimes called the Manus Islands, after the largest island. These rainforest-covered islands form part of Manus Province, the smallest and...

 with planes of Patrol Squadron 33 (VP-33) and VP-52 planes. They carried out night bombing missions in the Caroline Islands
Caroline Islands
The Caroline Islands are a widely scattered archipelago of tiny islands in the western Pacific Ocean, to the north of New Guinea. Politically they are divided between the Federated States of Micronesia in the eastern part of the group, and Palau at the extreme western end...

 and search flights by day. The pace had so quickened by the end of March 1944 that seaplane tender USS Tangier (AV-8)
USS Tangier (AV-8)
The second USS Tangier was a cargo ship, converted to a seaplane tender in the United States Navy during World War II.Tangier laid down under a Maritime Commission contract as Sea Arrow on 18 March 1939 at Oakland, California by Moore Dry Dock Company; launched on 15 September 1939; sponsored by...

 was brought in to help carry the load.

On 13 May 1944, San Pablo and Tangier moved to Hollandia
Jayapura
Jayapura City is the capital of Papua province, Indonesia, on the island of New Guinea. It is situated on Yos Sudarso Bay . Its approximate population in 2002 was 200,000....

, New Guinea, to patrol the approaches to Wakde Island prior to Allied landings there. Relieved by seaplane tender USS Orca (AVP-49)
USS Orca (AVP-49)
The second USS Orca was a United States Navy seaplane tender in commission from 1944 to 1947 and from 1951 to 1960.-Construction, commissioning, and shakedown:...

 on 26 May 1944, San Pablo then refueled PT boat
PT boat
PT Boats were a variety of motor torpedo boat , a small, fast vessel used by the United States Navy in World War II to attack larger surface ships. The PT boat squadrons were nicknamed "the mosquito fleet". The Japanese called them "Devil Boats".The original pre–World War I torpedo boats were...

s at Humboldt Bay
Teluk Yos Sudarso
Yos Sudarso Bay also known earlier as Humboldt Bay is a small bay in Indonesia. It is on the north coast of New Guinea, about 50 kilometers west of the border between Indonesia's province of Papua and the country of Papua New Guinea...

, New Guinea, and transported personnel and cargo between Manus Island
Manus Island
Manus Island is part of Manus Province in northern Papua New Guinea and is the largest island of the Admiralty Islands. It is the fifth largest island in Papua New Guinea with an area of 2,100 km², measuring around 100 km × 30 km. According to the 2000 census, Manus Island had a...

, Seeadler Harbor, Emirau, and Mios Woendi
Mios Woendi
Mios Woendi is the name of an island and was a forward base for United States Navy during World War II. The US Navy code word for the base located in Schouten Islands, was Stinker...

. On 19 August 1944, she commenced antisubmarine
Anti-submarine warfare
Anti-submarine warfare is a branch of naval warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines....

 patrols with Patrol Squadron 11 (VP-11) planes at Mios Woendi and, during October and November 1944, conducted antisubmarine operations off Morotai
Morotai
Morotai Island Regency is a regency of North Maluku province, Indonesia, located on Morotai Island. The population was 54,876 in 2007.-History:...

 and Hollandia.

Operations in the Philippines campaign

Relieved by seaplane tender USS San Carlos (AVP-51)
USS San Carlos (AVP-51)
USS San Carlos was a built for the United States Navy during World War II. San Carlos, named after San Carlos Bay, Florida, was in commissioned from 1944 to 1947 and earned three battle stars for service in the Pacific during World War II...

, San Pablo moved to Anibongon Bay at Leyte
Leyte
Leyte is a province of the Philippines located in the Eastern Visayas region. Its capital is Tacloban City and occupies the northern three-quarters of the Leyte Island. Leyte is located west of Samar Island, north of Southern Leyte and south of Biliran...

 in the Philippine Islands to support planes conducting search missions in the Philippines.

On 8 December 1944, San Pablo received survivors of destroyer
Destroyer
In naval terminology, a destroyer is a fast and maneuverable yet long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller, powerful, short-range attackers. Destroyers, originally called torpedo-boat destroyers in 1892, evolved from...

 USS Mahan (DD-364)
USS Mahan (DD-364)
The second USS Mahan was the lead ship of her class of destroyers in the United States Navy during World War II. She was named for Rear Admiral Alfred Thayer Mahan.-History:...

 who had been picked up by one of San Pablos PBMs after that Mahan had been hit by three kamikaze
Kamikaze
The were suicide attacks by military aviators from the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, designed to destroy as many warships as possible....

suicide aircraft and sank in Ormoc Bay
Ormoc Bay
Ormoc Bay is a bay on the island of Leyte in the Philippines. The bay is an inlet of the Camotes Sea. The city of Ormoc lies at the head of the bay and exports rice, copra and sugar. The World War II Battle of Ormoc Bay took place from November 11 until mid-December in Ormoc Bay during late 1944....

.

In late December 1944, San Pablo joined Convoy
Convoy
A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support, though it may also be used in a non-military sense, for example when driving through remote areas.-Age of Sail:Naval...

 "Uncle plus 15" en route to Mindoro
Mindoro
Mindoro is the seventh-largest island in the Philippines. It is located off the coast of Luzon, and northeast of Palawan. The southern coast of Mindoro forms the northeastern extremum of the Sulu Sea.-History:...

 and came under severe attack by suicide planes for three consecutive days. Most of the kamikazes were beaten off by antiaircraft fire from the convoy screen or by combat air patrol
Combat air patrol
Combat air patrol is a type of flying mission for fighter aircraft.A combat air patrol is an aircraft patrol provided over an objective area, over the force protected, over the critical area of a combat zone, or over an air defense area, for the purpose of intercepting and destroying hostile...

 fighters. However, one hit an ammunition ship
Ammunition ship
An ammunition ship is a warship specially configured to carry ammunition, usually for Navy ships and aircraft. Their cargo handling systems, designed with extreme safety in mind, include ammunition hoists with airlocks between decks, and mechanisms for flooding entire compartments with sea water in...

, which completely disintegrated in a tremendous explosion, and another crashed into a Liberty ship
Liberty ship
Liberty ships were cargo ships built in the United States during World War II. Though British in conception, they were adapted by the U.S. as they were cheap and quick to build, and came to symbolize U.S. wartime industrial output. Based on vessels ordered by Britain to replace ships torpedoed by...

 and caused severe damage. On 30 December 1944 at Mindoro, an Aichi D3A
Aichi D3A
The , Allied reporting name "Val") was a World War II carrier-borne dive bomber of the Imperial Japanese Navy . It was the primary dive bomber in the Imperial Japanese Navy, and participated in almost all actions, including Pearl Harbor....

 "Val" dive bomber
Dive bomber
A dive bomber is a bomber aircraft that dives directly at its targets in order to provide greater accuracy for the bomb it drops. Diving towards the target reduces the distance the bomb has to fall, which is the primary factor in determining the accuracy of the drop...

 barely passed astern of San Pablo and crashed into motor torpedo boat tender
Motor torpedo boat tender
Motor torpedo boat tender is a type of ship used by the U.S. Navy during World War II. The Motor torpedo boat tender's task was to act as a tender in remote areas for patrol boats and to provide the necessary fuel and provisions for the torpedo boats she was responsible for...

 Orestes (AGP-10)
USS Orestes (AGP-10)
USS Orestes was a motor torpedo boat tender that served in the United States Navy from 1944 to 1946.Orestes was laid down as landing ship tank USS LST–135 at Chicago Bridge and Iron Company, Seneca, Illinois, on 8 July 1943, and launched on 16 November 1943, sponsored by Mrs. Bernard Sharp...

, wounding four San Pablo men with shrapnel. On 31 December 1944, a Mitsubishi G4M
Mitsubishi G4M
The Mitsubishi G4M 一式陸上攻撃機, 一式陸攻 Isshiki rikujō kōgeki ki, Isshikirikkō was the main twin-engine, land-based bomber used by the Imperial Japanese Navy Air Service in World War II. The Allies gave the G4M the reporting name Betty...

 "Betty" bomber
Bomber
A bomber is a military aircraft designed to attack ground and sea targets, by dropping bombs on them, or – in recent years – by launching cruise missiles at them.-Classifications of bombers:...

 bombed nearby tanker
Tanker (ship)
A tanker is a ship designed to transport liquids in bulk. Major types of tankship include the oil tanker, the chemical tanker, and the liquefied natural gas carrier.-Background:...

 USS Porcupine (IX-126)
USS Porcupine (IX-126)
USS Porcupine , an Armadillo-class tanker designated an unclassified miscellaneous vessel, was the second ship of the United States Navy to be named for the porcupine....

 and then crashed into destroyer USS Gansevoort (DD-608)
USS Gansevoort (DD-608)
USS Gansevoort was a Benson-class destroyer in the United States Navy during World War II. She was named for Commodore Guert Gansevoort....

.

Through January and early February 1945, San Pablo supported Patrol Bombing Squadron 25 (VPB-25) and VP-33 as their aircraft conducted search missions in the South China Sea
South China Sea
The South China Sea is a marginal sea that is part of the Pacific Ocean, encompassing an area from the Singapore and Malacca Straits to the Strait of Taiwan of around...

 and along the China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 coast. On 13 February 1945, she was relieved by Tangier and returned to Leyte.

Through April 1945, San Pablo escorted landing ship tank USS LST-777, gasoline tanker USS Chestatee (AOG-49)
USS Chestatee (AOG-49)
USS Chestatee was a acquired by the U.S. Navy for the dangerous task of transporting gasoline to warships in the fleet, and to remote Navy stations....

, and various merchant ships operating as transports between Leyte and Palawan
Palawan
Palawan is an island province of the Philippines located in the MIMAROPA region or Region 4. Its capital is Puerto Princesa City, and it is the largest province in the country in terms of total area of jurisdiction. The islands of Palawan stretch from Mindoro in the northeast to Borneo in the...

. She then steamed, via Morotai, to Manus Island. At the end of June 1945, she moved to Samar
Samar
Samar, formerly and also known as Western Samar, is a province in the Philippines located in the Eastern Visayas region. Its capital is Catbalogan City and covers the western portion of Samar as well as several islands in the Samar Sea located to the west of the mainland...

 and the Lingayen Gulf
Lingayen Gulf
The Lingayen Gulf is an extension of the South China Sea on Luzon in the Philippines stretching . It is framed by the provinces of Pangasinan and La Union and sits between the Zambales Mountains and the Cordillera Central...

 area for air search and rescue operations in the South China Sea and Formosa
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

 area. These lasted until 15 August 1945 when she received orders to cease offensive operations upon the cessation of hostilities with Japan.

On 2 September 1945, the day of Japan's formal surrender ceremony, San Pablo was in Lingayen Gulf, with her seaplanes providing antisubmarine patrols to cover occupation convoys bound for Japan.

Inactivation and decommissioning

After attempting to aid the disabled Boeing 314
Boeing 314
The Boeing 314 Clipper was a long-range flying boat produced by the Boeing Airplane Company between 1938 and 1941 and is comparable to the British Short S.26. One of the largest aircraft of the time, it used the massive wing of Boeing’s earlier XB-15 bomber prototype to achieve the range necessary...

 flying boat Honolulu Clipper
Honolulu Clipper
Honolulu Clipper was the prototype Boeing 314 flying boat designed for Pan American Airways. It entered service in 1939 flying trans-Pacific routes.Like other long range Clipper aircraft in Pan-Am it aided US military during World War II...

650 miles (1,046.1 km) east of Oahu San Pablo arrived at Bremerton
Bremerton, Washington
Bremerton is a city in Kitsap County, Washington, United States. The population was 38,790 at the 2011 State Estimate, making it the largest city on the Olympic Peninsula. Bremerton is home to Puget Sound Naval Shipyard and the Bremerton Annex of Naval Base Kitsap...

, Washington, on 17 November 1945 to prepare for inactivation. She moved to Alameda
Alameda, California
Alameda is a city in Alameda County, California, United States. It is located on Alameda Island and Bay Farm Island, and is adjacent to Oakland in the San Francisco Bay. The Bay Farm Island portion of the city is adjacent to the Oakland International Airport. At the 2010 census, the city had a...

, California, on 25 March 1946 and remained idle there until decommissioned
Ship decommissioning
To decommission a ship is to terminate her career in service in the armed forces of her nation. A somber occasion, it has little of the elaborate ceremony of ship commissioning, but carries significant tradition....

 and placed in reserve on 13 January 1947.

Conversion and recommissioning

Following conversion to a hydrographic
Hydrography
Hydrography is the measurement of the depths, the tides and currents of a body of water and establishment of the sea, river or lake bed topography and morphology. Normally and historically for the purpose of charting a body of water for the safe navigation of shipping...

 survey ship, San Pablo was recommissioned on 17 September 1948 at San Francisco
San Francisco, California
San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

, California, with Commander T. E. Chambers in command. She conducted shakedown training off San Diego from 29 October 1948 to 15 November 1948 and was then ordered to report to the Norfolk Naval Shipyard
Norfolk Naval Shipyard
The Norfolk Naval Shipyard, often called the Norfolk Navy Yard and abbreviated as NNSY, is a U.S. Navy facility in Portsmouth, Virginia, for building, remodeling, and repairing the Navy's ships. It's the oldest and largest industrial facility that belongs to the U.S. Navy as well as the most...

 at Portsmouth
Portsmouth, Virginia
Portsmouth is located in the Hampton Roads metropolitan area of the U.S. Commonwealth of Virginia. As of 2010, the city had a total population of 95,535.The Norfolk Naval Shipyard, often called the Norfolk Navy Yard, is a historic and active U.S...

, Virginia
Virginia
The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

. She reached Portsmouth on 14 December 1948 and completed fitting out.

Initial operations 1949

On 3 February 1949, San Pablo departed in company with hydrographic survey ship USS Rehoboth (AVP-50)
USS Rehoboth (AVP-50)
The second USS Rehoboth was in commission in the United States Navy as a seaplane tender from 1944 to 1947 and as an oceanographic survey ship from 1948 to 1970.-Construction, commissioning, and shakedown:...

, also a converted Barnegat-class seaplane tender, for oceanographic
Oceanography
Oceanography , also called oceanology or marine science, is the branch of Earth science that studies the ocean...

 work in the western approaches to the Mediterranean Sea
Mediterranean Sea
The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Anatolia and Europe, on the south by North Africa, and on the east by the Levant...

. Calling at Ponta Delgada
Ponta Delgada
Ponta Delgada is a city and municipality on the island of São Miguel in the archipelago of the Azores, an autonomous region of Portugal. It includes 44,403 residents in the urban area, and approximately 20,113 inhabitants in the three central parishes that comprise the historical city: São Pedro,...

 in the Azores
Azores
The Archipelago of the Azores is composed of nine volcanic islands situated in the middle of the North Atlantic Ocean, and is located about west from Lisbon and about east from the east coast of North America. The islands, and their economic exclusion zone, form the Autonomous Region of the...

, at Plymouth in England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

, at Gibraltar
Gibraltar
Gibraltar is a British overseas territory located on the southern end of the Iberian Peninsula at the entrance of the Mediterranean. A peninsula with an area of , it has a northern border with Andalusia, Spain. The Rock of Gibraltar is the major landmark of the region...

, and at Bermuda
Bermuda
Bermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...

, she returned to the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, arriving at Philadelphia
Philadelphia, Pennsylvania
Philadelphia is the largest city in the Commonwealth of Pennsylvania and the county seat of Philadelphia County, with which it is coterminous. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States,...

, Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

, on 18 April 1949.

Later in 1949, San Pablo conducted two similar cruises to survey and measure ocean current
Ocean current
An ocean current is a continuous, directed movement of ocean water generated by the forces acting upon this mean flow, such as breaking waves, wind, Coriolis effect, cabbeling, temperature and salinity differences and tides caused by the gravitational pull of the Moon and the Sun...

s. During the last of these voyages, she also made a study of the North Atlantic Current
North Atlantic Current
The North Atlantic Current is a powerful warm ocean current that continues the Gulf Stream northeast. West of Ireland it splits in two; one branch, the Canary Current, goes south, while the other continues north along the coast of northwestern Europe...

. She included in her ports of call Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

 in the Orkney Islands
Orkney Islands
Orkney also known as the Orkney Islands , is an archipelago in northern Scotland, situated north of the coast of Caithness...

, Oslo
Oslo
Oslo is a municipality, as well as the capital and most populous city in Norway. As a municipality , it was established on 1 January 1838. Founded around 1048 by King Harald III of Norway, the city was largely destroyed by fire in 1624. The city was moved under the reign of Denmark–Norway's King...

, Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

, and Copenhagen
Copenhagen
Copenhagen is the capital and largest city of Denmark, with an urban population of 1,199,224 and a metropolitan population of 1,930,260 . With the completion of the transnational Øresund Bridge in 2000, Copenhagen has become the centre of the increasingly integrating Øresund Region...

, Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

.

Redesignation

San Pablo was redesignated AGS-30, reflecting her 1948 conversion and change of mission, on 25 August 1949.

Later operations 1950-1968

Beginning 18 January 1950, San Pablo conducted a survey of the Gulf Stream
Gulf Stream
The Gulf Stream, together with its northern extension towards Europe, the North Atlantic Drift, is a powerful, warm, and swift Atlantic ocean current that originates at the tip of Florida, and follows the eastern coastlines of the United States and Newfoundland before crossing the Atlantic Ocean...

 and, from 5 June 1950 to 26 June 1950, served as survey headquarters
Headquarters
Headquarters denotes the location where most, if not all, of the important functions of an organization are coordinated. In the United States, the corporate headquarters represents the entity at the center or the top of a corporation taking full responsibility managing all business activities...

 ship for a group of American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Canadian
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 vessels engaged in broad-coverage behavioral studies of that massive current. After a cruise to Casablanca
Casablanca
Casablanca is a city in western Morocco, located on the Atlantic Ocean. It is the capital of the Grand Casablanca region.Casablanca is Morocco's largest city as well as its chief port. It is also the biggest city in the Maghreb. The 2004 census recorded a population of 2,949,805 in the prefecture...

, French Morocco
French Morocco
French Protectorate of Morocco was a French protectorate in Morocco, established by the Treaty of Fez. French Morocco did not include the north of the country, which was a Spanish protectorate...

, in July and August 1950, she returned to the United States East Coast to conduct survey operations between New London
New London, Connecticut
New London is a seaport city and a port of entry on the northeast coast of the United States.It is located at the mouth of the Thames River in New London County, southeastern Connecticut....

, Connecticut
Connecticut
Connecticut is a state in the New England region of the northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, and the state of New York to the west and the south .Connecticut is named for the Connecticut River, the major U.S. river that approximately...

, and Key West
Key West, Florida
Key West is a city in Monroe County, Florida, United States. The city encompasses the island of Key West, the part of Stock Island north of U.S. 1 , Sigsbee Park , Fleming Key , and Sunset Key...

, Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

, for the remainder of 1950.

During 1951, San Pablo conducted oceanographic studies during various cruises, ranging from Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 to the Mediterranean Sea and along the New England
New England
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

 coast in the Narragansett Bay
Narragansett Bay
Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound. Covering 147 mi2 , the Bay forms New England's largest estuary, which functions as an expansive natural harbor, and includes a small archipelago...

 area. Her tasks included making accurate profile studies of the ocean
Ocean
An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.More than half of this area is over 3,000...

 bottom for the purpose of evaluating new sonar
Sonar
Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

 devices.

In 1952, she spent the majority of her time in the North Atlantic Ocean, and devoted the latter part of the year to training operations out of Norfolk
Norfolk, Virginia
Norfolk is an independent city in the Commonwealth of Virginia in the United States. With a population of 242,803 as of the 2010 Census, it is Virginia's second-largest city behind neighboring Virginia Beach....

, Virginia.

From 1953 through 1968, San Pablo alternated between the North Atlantic and the Caribbean Sea
Caribbean Sea
The Caribbean Sea is a sea of the Atlantic Ocean located in the tropics of the Western hemisphere. It is bounded by Mexico and Central America to the west and southwest, to the north by the Greater Antilles, and to the east by the Lesser Antilles....

, conducting studies on salinity
Salinity
Salinity is the saltiness or dissolved salt content of a body of water. It is a general term used to describe the levels of different salts such as sodium chloride, magnesium and calcium sulfates, and bicarbonates...

, sound
Sound
Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.-Propagation of...

 reflectivity
Reflection (physics)
Reflection is the change in direction of a wavefront at an interface between two differentmedia so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves...

, underwater photography techniques, deep-bottom core sampling
Core sample
A core sample is a cylindrical section of a naturally occurring substance. Most core samples are obtained by drilling with special drills into the substance, for example sediment or rock, with a hollow steel tube called a core drill. The hole made for the core sample is called the "core hole". A...

, bottom profile mapping, and subsurface wave
Wave
In physics, a wave is a disturbance that travels through space and time, accompanied by the transfer of energy.Waves travel and the wave motion transfers energy from one point to another, often with no permanent displacement of the particles of the medium—that is, with little or no associated mass...

 phenomena, as well as work on secret topics. For several months during 1965, she used the port and docking facilities at Rosyth, Scotland, as a temporary home port, courtesy of the British
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

.

Inactivation, decommissioning, and final disposition

From 1 January 1969 to 29 May 1969, San Pablo underwent inactivation at Philadelphia. She was decommissioned on 29 May 1969 and struck from the Naval Vessel Register
Naval Vessel Register
The Naval Vessel Register is the official inventory of ships and service craft in custody of or titled by the United States Navy. It contains information on ships and service craft that make up the official inventory of the Navy from the time a vessel is authorized through its life cycle and...

 on 1 June 1969.

San Pablo was loaned for a time to the Ocean Sciences Center of the Atlantic
Skidaway Institute of Oceanography
The Skidaway Institute of Oceanography is an internationally renowned marine science research institute located on the northern end of Skidaway Island near Savannah, Georgia, USA. Founded in 1968, it is part of the University System of Georgia as an independent research unit...

 in Savannah
Savannah, Georgia
Savannah is the largest city and the county seat of Chatham County, in the U.S. state of Georgia. Established in 1733, the city of Savannah was the colonial capital of the Province of Georgia and later the first state capital of Georgia. Today Savannah is an industrial center and an important...

, Georgia
Georgia (U.S. state)
Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...

, after which she was sold on 14 September 1971 to Mrs. Margo Zahardis of Vancouver
Vancouver, Washington
Vancouver is a city on the north bank of the Columbia River in the U.S. state of Washington. Incorporated in 1857, it is the fourth largest city in the state with a 2010 census population of 161,791 as of April 1, 2010...

, Washington.
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