Type A Kō-hyōteki-class submarine

The No.1-class landing ship was a class of amphibious assault ships of the Imperial Japanese Navy (IJN), serving during and after World War II. The IJN also called them 1st class transporter .

A conning tower is a raised platform on a ship or submarine, often armoured, from which an officer in charge can conn the vessel, controlling movements of the ship by giving orders to those responsible for the ship's engine, rudder, lines, and ground tackle. It is usually located as high on the ship as practical, to give the conning team good visibility of the entirety of the ship, ocean conditions, and other vessels.

The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the U.S. naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00 a.m. on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.

The Type 97 was a 17.7 inches (45 cm) diameter torpedo used by the Imperial Japanese Navy during World War II. Intended for use with Japan's Kō-hyōteki-class midget submarines, the torpedo was based on the 24-inch diameter Type 93 "Long Lance" used by Japanese surface vessels, but redesigned to meet the smaller 18-inch physical dimensions of the midgets' two torpedo tubes. Larger Japanese submarines were armed with the 21-inch Type 95 torpedo.

The Type 91 was an aerial torpedo of the Imperial Japanese Navy. It was in service from 1931 to 1945. It was used in naval battles in World War II and was specially developed for attacks on ships in shallow harbours.

A suicide weapon is a weapon designed to be used in a suicide attack, typically based on explosives.

USS Current (ARS-22) was a Diver-class rescue and salvage ship commissioned by the U.S. Navy during World War II. Her task was to come to the aid of stricken vessels.

The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the U.S. naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00 a.m. on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.

Kazuo Sakamaki was a Japanese naval officer who became the first prisoner of war of World War II to be captured by U.S. forces.

A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500, or roughly three percent, of over 90,000 places listed on the country's National Register of Historic Places are recognized as National Historic Landmarks.

Fredericksburg is the seat of Gillespie County, in the U.S. state of Texas. As of the 2010 Census, this city had a population of 10,530.

Etajima base in Etajima city, Hiroshima prefecture is in the Etajima-cho government building and is the base of the Japan Maritime Self-Defense Force. Beside housing the 1st Technical School and the Officer Candidates School, it is home to the local Kure Naval District, LCAC training facilities, and Self-Defense Force oil storage. In addition, the Special Forces of the Maritime Self Defense Force is here.

USS Curtiss (AV-4) was the first purpose-built seaplane tender constructed for the United States Navy. She was named for Glenn Curtiss, an American naval aviation pioneer that designed the Curtiss NC-4, the first aircraft to fly across the Atlantic Ocean.

USS Monaghan (DD-354) was the last ship built of the Farragut-class destroyer design. She was named for Ensign John R. Monaghan. Monaghan was laid down on November 21, 1933 at the Boston Navy Yard, and launched on January 9, 1935. She was sponsored by Miss Mary F. Monaghan, niece of Ensign Monaghan, and commissioned on 19 April 1935. During the next few years Monaghan operated primarily in the North Atlantic, training US Navy personnel who served in World War II. Monaghan was present during the Pearl Harbor raid on December 7, 1941. She participated in the Battle of the Coral Sea and the Battle of Midway in 1942. Monaghan was sunk in Typhoon Cobra east of the Philippines in 1944.

Ford Island is an islet in the center of Pearl Harbor, Oahu, in the U.S. state of Hawaii. It has been known as Rabbit Island, Marín's Island, and Little Goats Island, and its native Hawaiian name is Mokuʻumeʻume. The island had an area of 334 acres (135 ha) when it was surveyed in 1825, which was increased during the 1930s to 441 acres (178 ha) with fill dredged out of Pearl Harbor by the United States Navy to accommodate battleships.

The Hawaii Undersea Research Laboratory (HURL) is a regional undersea research program within the School of Ocean and Earth Science and Technology (SOEST) at University of Hawaiʻi at Mānoa, in Honolulu. It is considered one of the more important of the independently run undersea research laboratories in the U.S. HURL operates two deep diving submersibles, the Pisces IV and Pisces V and specializes in supporting scientific ocean research and exploration. HURL is actively involved in monitoring deep-sea ecosystems, including coral habitats and fisheries, and conducts maritime archaeology research including documenting World War II wreckage from the Attack on Pearl Harbor in 1941.

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. Prior to this smaller cruisers had been of the protected cruiser model, possessing armored decks only. While lighter and smaller than other contemporary ships they were still true cruisers, retaining the extended radius of action and self-sufficiency to act independently around the world. Through their history they served in a variety of roles, primarily as convoy escorts and destroyer command ships, but also as scouts and fleet support vessels for battle fleets.

USS St. Louis, eighth of nine Brooklyn-class light cruisers, was the fifth ship of the United States Navy named after the city of St. Louis, Missouri. Commissioned in 1939, she was very active in the Pacific during World War II, earning eleven battle stars.

In late May and early June 1942, during World War II, Imperial Japanese Navy submarines made a series of attacks on the Australian cities of Sydney and Newcastle. On the night of 31 May – 1 June, three Ko-hyoteki-class midget submarines, each with a two-member crew, entered Sydney Harbour, avoided the partially constructed Sydney Harbour anti-submarine boom net, and attempted to sink Allied warships. Two of the midget submarines were detected and attacked before they could engage any Allied vessels. The crew of M-14 scuttled their submarine, whilst M-21 was successfully attacked and sunk. The crew of M-21 killed themselves. These submarines were later recovered by the Allies. The third submarine attempted to torpedo the heavy cruiser USS Chicago, but instead sank the converted ferry HMAS Kuttabul, killing 21 sailors. This midget submarine's fate was unknown until 2006, when amateur scuba divers discovered the wreck off Sydney's northern beaches.

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, and mountain ranges in the south-east.

A flotilla, or naval flotilla, is a formation of small warships that may be part of a larger fleet.

The Sydney Harbour Bridge is a steel through arch bridge in Sydney, spanning Sydney Harbour from the central business district (CBD) to the North Shore. The view of the bridge, the harbour, and the nearby Sydney Opera House is widely regarded as an iconic image of Sydney, and of Australia itself. Nicknamed "The Coathanger" because of its arch-based design, the bridge carries rail, vehicular, bicycle and pedestrian traffic.

HMAS Kuttabul, formerly SS Kuttabul, was a Royal Australian Navy depot ship, converted from a Sydney Ferries Limited ferry.

The Royal Australian Navy (RAN) is the naval force of the Australian Defence Force (ADF). The professional head of the RAN is Chief of Navy (CN) Vice Admiral Mark Hammond AM, RAN. CN is also jointly responsible to the Minister of Defence (MINDEF) and the Chief of Defence Force (CDF). The Department of Defence as part of the Australian Public Service administers the ADF.

The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service.

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

New South Wales is a state on the east coast of Australia. It borders Queensland to the north, Victoria to the south, and South Australia to the west. Its coast borders the Coral and Tasman Seas to the east. The Australian Capital Territory and Jervis Bay Territory are enclaves within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. In December 2021, the population of New South Wales was over 8 million, making it Australia's most populous state. Just under two-thirds of the state's population, 5.3 million, live in the Greater Sydney area.

South Australia is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of 984,321 square kilometres (380,048 sq mi), it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233.

The Australian War Memorial is Australia's national memorial to the members of its armed forces and supporting organisations who have died or participated in wars involving the Commonwealth of Australia and some conflicts involving personnel from the Australian colonies prior to Federation. Opened in 1941, the memorial includes an extensive national military museum.

Canberra is the capital city of Australia. Founded following the federation of the colonies of Australia as the seat of government for the new nation, it is Australia's largest inland city and the eighth-largest Australian city overall. The city is located at the northern end of the Australian Capital Territory at the northern tip of the Australian Alps, the country's highest mountain range. As of June 2021, Canberra's estimated population was 453,558.

The Battle of Madagascar was a British campaign to capture the Vichy French-controlled island Madagascar during World War II. The seizure of the island by the British was to deny Madagascar's ports to the Imperial Japanese Navy and to prevent the loss or impairment of the Allied shipping routes to India, Australia and Southeast Asia. It began with Operation Ironclad, the seizure of the port of Diego-Suarez near the northern tip of the island, on 5 May 1942.

A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as boats rather than ships irrespective of their size.

Madagascar, officially the Republic of Madagascar is a sovereign island country in the Indian Ocean, approximately 400 kilometres off the coast of East Africa across the Mozambique Channel. At 592,800 square kilometres (228,900 sq mi), it is the world's second-largest island country, after Indonesia. Its capital and largest city is Antananarivo.

The Revenge class, sometimes referred to as the Royal Sovereign class or the R class, consisted of five superdreadnought battleships built for the Royal Navy in the 1910s. All of the ships were completed to see service during the First World War. There were originally to have been eight of the class, but two were later redesigned, becoming the Renown-class battlecruisers, while the other, which was to have been named HMS Resistance, was cancelled outright. The design was based on that of the preceding Queen Elizabeth class, but with reductions in size and speed to make them more economical to build.

HMS Ramillies was one of five Revenge-class super-dreadnought battleships built for the Royal Navy during the First World War. They were developments of the Queen Elizabeth-class battleships, with reductions in size and speed to offset increases in the armour protection whilst retaining the same main battery of eight 15-inch (381 mm) guns. Completed in late 1917, Ramillies saw no combat during the war as both the British and the German fleets had adopted a more cautious strategy by this time owing to the increasing threat of naval mines and submarines.

A harbor, harbour, or haven is a sheltered body of water where ships, boats, and barges can be docked. The term harbor is often used interchangeably with port, which is a man-made facility built for loading and unloading vessels and dropping off and picking up passengers. Ports usually include one or more harbors. Alexandria Port in Egypt is an example of a port with two harbors.

A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war.

An oil tanker, also known as a petroleum tanker, is a ship designed for the bulk transport of oil or its products. There are two basic types of oil tankers: crude tankers and product tankers. Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries. Product tankers, generally much smaller, are designed to move refined products from refineries to points near consuming markets.

Durban, nicknamed Durbs, is the third most populous city in South Africa after Johannesburg and Cape Town and the largest city in KwaZulu-Natal. Durban forms part of the eThekwini Metropolitan Municipality, which includes neighbouring towns and has a population of about 3.44 million, making the combined municipality one of the largest cities on the Indian Ocean coast of the African continent. Durban was also one of the host cities of the 2010 FIFA World Cup.

Plymouth is a port city and unitary authority in South West England. It is located on the south coast of Devon, aplocal caves, and artefacts dating from the Bronze Age to the Middle Iron Age have been found at Mount Batten, showing that it was one of few principal trading ports of pre-Roman Britannia dominating continental trade with Armorica. An unidentified settlement named TAMARI OSTIA is listed in Ptolemy's Geographia and is presumed to be located in the area of the modern city. An ancient promontory fort was located at Rame Head at the mouth of Plymouth Sound with ancient hillforts located at Lyneham Warren to the east, Boringdon Camp and Maristow Camp to the north.

The Corps of Royal Marines (RM), also known as the Royal Marines Commandos, are the UK's special operations capable commando force, amphibious light infantry and also one of the five fighting arms of the Royal Navy. The Corps of Royal Marines can trace their origins back to the formation of the "Duke of York and Albany's maritime regiment of Foot" on 28 October 1664, and can trace their commando origins to the formation of the 3rd Special Service Brigade, now known as 3 Commando Brigade on 14 February 1942, during the Second World War.

The knot is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h. The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization (ICAO). The knot is a non-SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.

A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such a device was called an automotive, automobile, locomotive, or fish torpedo; colloquially a fish. The term torpedo originally applied to a variety of devices, most of which would today be called mines. From about 1900, torpedo has been used strictly to designate a self-propelled underwater explosive device.

The Type 97 was a 17.7 inches (45 cm) diameter torpedo used by the Imperial Japanese Navy during World War II. Intended for use with Japan's Kō-hyōteki-class midget submarines, the torpedo was based on the 24-inch diameter Type 93 "Long Lance" used by Japanese surface vessels, but redesigned to meet the smaller 18-inch physical dimensions of the midgets' two torpedo tubes. Larger Japanese submarines were armed with the 21-inch Type 95 torpedo.

Kure Naval Arsenal was one of four principal naval shipyards owned and operated by the Imperial Japanese Navy.

Kure is a port and major shipbuilding city situated on the Seto Inland Sea in Hiroshima Prefecture, Japan. With a strong industrial and naval heritage, Kure hosts the second-oldest naval dockyard in Japan and remains an important base for the Japan Maritime Self-Defence Force (JMSDF) named, JMSDF Kure Naval Base. As of 1 May 2015, the city has an estimated population of 228,030 and a population density of 646 persons per km2. The total area is 352.80 km2.

Kiska is one of the Rat Islands, a group of the Aleutian Islands of Alaska. It is about 22 miles (35 km) long and varies in width from 1.5 to 6 miles. It is part of Aleutian Islands Wilderness and as such, special permission is required to visit it. The island has no permanent population.

The Aleutian Islands, also called the Aleut Islands or Aleutic Islands and known before 1867 as the Catherine Archipelago, are a chain of 14 large volcanic islands and 55 smaller islands. Most of the Aleutian Islands belong to the U.S. state of Alaska, but some belong to the Russian federal subject of Kamchatka Krai. They form part of the Aleutian Arc in the Northern Pacific Ocean, occupying a land area of 6,821 sq mi (17,666 km2) and extending about 1,200 mi (1,900 km) westward from the Alaska Peninsula toward the Kamchatka Peninsula in Russia, and act as a border between the Bering Sea to the north and the Pacific Ocean to the south. Crossing longitude 180°, at which point east and west longitude end, the archipelago contains both the westernmost part of the United States by longitude and the easternmost by longitude. The westernmost U.S. island in real terms, however, is Attu Island, west of which runs the International Date Line. While nearly all the archipelago is part of Alaska and is usually considered as being in the "Alaskan Bush", at the extreme western end, the small, geologically related Commander Islands belong to Russia.

The United States Navy Submarine Force Library and Museum is located on the Thames River in Groton, Connecticut. It is the only submarine museum managed exclusively by the Naval History & Heritage Command division of the Navy, and this makes it a repository for many special submarine items of national significance, including USS Nautilus (SSN-571). Visitors may take a 30-minute self-guided audio tour of the Nautilus.

Etajima base in Etajima city, Hiroshima prefecture is in the Etajima-cho government building and is the base of the Japan Maritime Self-Defense Force. Beside housing the 1st Technical School and the Officer Candidates School, it is home to the local Kure Naval District, LCAC training facilities, and Self-Defense Force oil storage. In addition, the Special Forces of the Maritime Self Defense Force is here.

The HA. 19 is a historic Imperial Japanese Navy Type A Kō-hyōteki-class midget submarine that was part of the Japanese attack on Pearl Harbor on 7 December 1941. The submarine's crew was ordered to enter Pearl Harbor, attack the moored American warships with its two torpedoes and then scuttle her with explosives. However, the crew was unable to enter the harbor due to navigational difficulties, and the submarine ran aground and was captured by American forces.

The National Museum of the Pacific War is located in Fredericksburg, Texas, the boyhood home of Fleet Admiral Chester W. Nimitz. Nimitz served as commander in chief, United States Pacific Fleet (CinCPAC), and was soon afterward named commander in chief, Pacific Ocean Areas, during World War II. The six-acre site includes the Admiral Nimitz Museum, which is housed in the old Nimitz Hotel and tells the story of Nimitz beginning with his life as a young boy through his naval career as well as the evolution of the old hotel.

The Australian War Memorial is Australia's national memorial to the members of its armed forces and supporting organisations who have died or participated in wars involving the Commonwealth of Australia and some conflicts involving personnel from the Australian colonies prior to Federation. Opened in 1941, the memorial includes an extensive national military museum.