Bathyscaphe

A bathyscaphe (/ˈbæθɪskeɪf/ or /ˈbæθɪskæf/) is a free-diving self-propelled deep-sea submersible, consisting of a crew cabin similar to a bathysphere, but suspended below a float rather than from a surface cable, as in the classic bathysphere design.[1]

The float is filled with gasoline because it is readily available, buoyant, and, for all practical purposes, incompressible. The incompressibility of the gasoline means the tanks can be very lightly constructed, since the pressure inside and outside the tanks equalises, eliminating any differential. By contrast, the crew cabin must withstand a huge pressure differential and is massively built. Buoyancy at the surface can be trimmed easily by replacing gasoline with water, which is denser.

Auguste Piccard, inventor of the first bathyscaphe, composed the name bathyscaphe using the Ancient Greek words βαθύς bathys ("deep") and σκάφος skaphos ("vessel"/"ship").

Trieste (23 Jan 1960).jpeg
Bathyscaphe Trieste, before its only dive into the Mariana Trench

Mode of operation

To descend, a bathyscaphe floods air tanks with sea water, but unlike a submarine the water in the flooded tanks cannot be displaced with compressed air to ascend, because the water pressures at the depths for which the craft was designed to operate are too great. For example, the pressure at the bottom of the Challenger Deep is more than seven times that in a standard "H-type" compressed gas cylinder. Instead, ballast in the form of iron shot is released to ascend, the shot being lost to the ocean floor. The iron shot containers are in the form of one or more hoppers which are open at the bottom throughout the dive, the iron shot being held in place by an electromagnet at the neck. This is a fail-safe device as it requires no power to ascend; in fact, in the event of a power failure, shot runs out by gravity and ascent is automatic.

Trieste nh96807
Internal arrangement of Trieste.

History of development

The first bathyscaphe was dubbed FNRS-2, named after the Fonds National de la Recherche Scientifique, and built in Belgium from 1946 to 1948 by Auguste Piccard. (FNRS-1 had been the balloon used for Piccard's ascent into the stratosphere in 1938). Propulsion was provided by battery-driven electric motors.[1] The float held 37,850 litres (8,330 imp gal; 10,000 US gal) of aviation gasoline. There was no access tunnel; the sphere had to be loaded and unloaded while on deck. The first journeys were detailed in the Jacques Cousteau book The Silent World. As described in the book, "the vessel had serenely endured the pressure of the depths, but had been destroyed in a minor squall". FNRS-3 was a new submersible, using the crew sphere from the damaged FNRS-2, and a new larger 75,700 litres (16,700 imp gal; 20,000 US gal) float.

Piccard's second bathyscaphe was actually a third vessel Trieste, which was purchased by the United States Navy from Italy in 1957.[1] It had two water ballast tanks and eleven buoyancy tanks holding 120,000 litres (26,000 imp gal; 32,000 US gal) of gasoline.[2]

Accomplishments

In 1960 Trieste, carrying Piccard's son Jacques Piccard and Lt. Don Walsh, reached the deepest known point on the Earth's surface, the Challenger Deep, in the Mariana Trench.[1]

The onboard systems indicated a depth of 37,800 ft (11,521 m) but this was later corrected to 35,813 ft (10,916 m) by taking into account variations arising from salinity and temperature. Later and more accurate measurements made in 1995 have found the Challenger Deep to be slightly shallower at 35,798 ft (10,911 m).

The bathyscaphe was equipped with a powerful light, which illuminated a small flounder-like fish, putting to rest the question of whether or not there was life at such a depth in the complete absence of light. The crew of the Trieste noted that the floor consisted of diatomaceous ooze and reported observing "some type of flatfish, resembling a sole, about 1 foot long and 6 inches across" lying on the seabed.[3]

Non bathyscaphe deep sea vehicles:

In 1995, the Japanese sent an unmanned submersible to this depth, Kaikō, but it was later lost at sea. In 2009, a team from the Woods Hole Oceanographic Institution sent a robotic submarine named Nereus to the bottom of the trench.[4]

On 25 March 2012, James Cameron reached the Challenger Deep in the Deepsea Challenger submersible.[5][6][7]

See also

References

  1. ^ a b c d Brand, V (1977). "Submersibles – Manned and Unmanned". South Pacific Underwater Medicine Society Journal. 7 (3). ISSN 0813-1988. OCLC 16986801. Archived from the original on 1 August 2008. Retrieved 2008-07-10.
  2. ^ "Chapter 11" (PDF). Wet Paper. Retrieved 2008-09-25.
  3. ^ "To the bottom of the sea" Archived 2008-12-03 at the Wayback Machine, T. A. Heppenheimer, AmericanHeritage.com
  4. ^ "Robot Sub Reaches the World's Deepest Abyss". New Scientist. Archived from the original on 5 June 2009. Retrieved 2009-06-02.
  5. ^ Than, Ker (25 March 2012). "James Cameron Completes Record-Breaking Mariana Trench Dive". National Geographic Society. Retrieved 25 March 2012.
  6. ^ Broad, William J. (25 March 2012). "Filmmaker in Submarine Voyages to Bottom of Sea". The New York Times. Retrieved 25 March 2012.
  7. ^ AP Staff (25 March 2012). "James Cameron has reached deepest spot on Earth". MSNBC. Retrieved 25 March 2012.

External links

Archimède

The bathyscaphe Archimède is a deep diving research submersible of the French Navy. It used 42,000 US gallons (160,000 l) of hexane as the gasoline buoyancy of its float. It was designed by Pierre Willm and Georges Houot. Archimède was the first vehicle to reach the deepest part of the Atlantic Ocean, 27,510 feet (8,390 m) down into the Puerto Rico Trench.Archimède was christened on 27 July 1961, at the French Navy base of Toulon. It was designed to go beyond 30,000 yards (27,000 m), and displaced 61 tons. In October 1961, Archimède passed its first dive tests, diving to 5,000 feet (1,500 m) unmanned. On 27 November 1961, Archimède achieved a speed of 3 knots (5.6 km/h; 3.5 mph), over a distance of 4.5 miles (7.2 km) at a depth of 7,870 feet (2,400 m) in the Mediterranean Sea.On 23 May 1962, Archimède descended to 15,744 feet (4,799 m) off Honshu, Japan, in the Pacific, at the Japan Deep. On 15 July 1962, Archimède descended to 31,350 feet (9,560 m) into the Kurile-Kamchatcha Trench, making it the second deepest dive ever, at that point in time, second only to the Bathyscaphe Trieste dive on the Challenger Deep. On 12 August 1962, Archimède descended to 30,511 feet (9,300 m) in the Japan Deep south of Tokyo.Archimède explored the Mid-Atlantic Ridge jointly with the submarine Cyana and submersible DSV Alvin, in Project FAMOUS (French American Mid Ocean Underwater Survey) in 1974.Archimède operated until the 1970s. As of 2008, it is on operational reserve, at Toulon. Archimède was honoured with a stamp in Palau.

Auguste Piccard

Auguste Antoine Piccard (28 January 1884 – 24 March 1962) was a Swiss physicist, inventor and explorer, known for his record-breaking helium-filled balloon flights, with which he studied the Earth's upper atmosphere. Auguste was also known for his invention of the first bathyscaphe, FNRS-2, with which he made a number of unmanned dives in 1948 to explore the ocean's depths.

Piccard's twin brother Jean Felix Piccard is also a notable figure in the annals of science and exploration, as are a number of their relatives, including Jacques Piccard, Bertrand Piccard, Jeannette Piccard and Don Piccard.

Bathyscaphe Trieste

Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with its crew of two reached a record maximum depth of about 10,911 metres (35,797 ft), in the deepest known part of the Earth's oceans, the Challenger Deep, in the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton.

Trieste was the first manned vessel to have reached the bottom of the Challenger Deep.

Bathyscaphe Trieste II

Trieste II (DSV-1) was the successor to Trieste—the United States Navy's first bathyscaphe purchased from its Swiss designers. The original Trieste design was heavily modified by the Naval Electronics Laboratory in San Diego, California and built at the Mare Island Naval Shipyard. Trieste II incorporated the original Terni, Italian-built sphere used in Trieste, after it was made redundant by the new high-pressure sphere cast by the German Krupp Steelworks. The Trieste sphere was suspended from an entirely new float, more seaworthy and streamlined than the original but operating on identical principles. Completed in early 1964, Trieste II was placed on board USNS Francis X. McGraw (T-AK241) and shipped, via the Panama Canal, to Boston.

Commanded by Lt Comdr. John B. Mooney Jr., with co-pilot Lt. John H. Howland and Capt. Frank Andrews, Trieste II conducted dives in the vicinity of the loss site of Thresher—operations commenced by the first Trieste the year before. She recovered bits of wreckage, positively fixing the remains as that of the lost Thresher, in September 1964.

Between September 1965 and May 1966, Trieste II again underwent extensive modification and conversion at Mare Island Naval Shipyard, but there is no clear record that she was ever operated in that new configuration, i.e., the addition of skegs or outriggers on both sides of the sphere.

During that same time period work was under way on a third configuration of the bathyscaphe. This work resulted in yet a new appearance for the Trieste II, and included the installation of a new pressure sphere, designed for operation to 20,000 feet (6,100 m).

As the bathyscaphe continued her operations as test vehicle for the deep submergence program, she qualified four officers as "hydronauts"—the beginning of a burgeoning oceanographic operation. Trieste II's valuable experience in deep submergence operations has helped in the design and construction of other deep-diving submersibles which could be used in rescuing crews and recovering objects from submarines in distress below levels reachable by conventional methods.

This unique craft was listed only as "equipment" in the Navy inventory until the autumn of 1969. On 1 September 1969, Trieste II was placed in service, with the hull number X-1. She was reclassified as a deep submergence vehicle (DSV) on 1 June 1971.

On 25 April 1972, Trieste II recovered a satellite package called a "bucket" weighing several hundred pounds from a depth of greater than 16,000 feet (4,900 m), a record at the time. Trieste II (DSV-1) continued her active service in the Pacific Fleet into 1980.

The Trieste class DSV were replaced by the Alvin class DSV, as exemplified by the famous Alvin (DSV-2). The Alvins are more capable, more maneuverable, less fragile, but also can not dive as deep, reaching only a maximum of 20,000 feet (for the Sea Cliff (DSV-4)).

Trieste II is now preserved as a museum ship at the Naval Undersea Museum, Keyport, Washington.

Cranchiidae

The family Cranchiidae comprises the approximately 60 species of glass squid, also known as cockatoo squid, cranchiid, cranch squid, or bathyscaphoid squid. Cranchiid squid occur in surface and midwater depths of open oceans around the world. They range in mantle length from 10 cm (3.9 in) to over 3 m (9.8 ft), in the case of the colossal squid. The common name, glass squid, derives from the transparent nature of most species. Cranchiid squid spend much of their lives in partially sunlit shallow waters, where their transparency provides camouflage. They are characterised by a swollen body and short arms, which bear two rows of suckers or hooks. The third arm pair is often enlarged. Many species are bioluminescent organisms and possess light organs on the undersides of their eyes, used to cancel their shadows. Eye morphology varies widely, ranging from large and circular to telescopic and stalked. A large, fluid-filled chamber containing ammonia solution is used to aid buoyancy. This buoyancy system is unique to the family and is the source of their common name "bathyscaphoid squid", after their resemblance to a bathyscaphe. Often the only organ that is visible through the transparent tissues is a cigar-shaped digestive gland, which is the cephalopod equivalent of a mammalian liver. This is usually held in a vertical position to reduce its silhouette and a light organ is sometimes present on the lower tip to further minimise its appearance in the water.Like most squid, the juveniles of cranchiid squid live in surface waters, descending to deeper waters as they mature. Some species live over 2 km below sea level. The body shape of many species changes drastically between growth stages, and many young examples could be confused for different species altogether.

Cranchiid squid represent no interest to commercial fisheries.

The family is named for John Cranch.

DSV Alvin

Alvin (DSV-2) is a manned deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, Massachusetts. The vehicle was built by General Mills' Electronics Group in Minneapolis, Minnesota. Named to honor the prime mover and creative inspiration for the vehicle, Allyn Vine, Alvin was commissioned on 5 June 1964. The submersible is launched from the deep submergence support vessel RV Atlantis (AGOR-25), which is also owned by the U.S. Navy and operated by WHOI. The submersible has made more than 4,400 dives, carrying two scientists and a pilot, to observe the lifeforms that must cope with super-pressures and move about in total darkness, as well as exploring the wreck of Titanic. Research conducted by Alvin has been featured in nearly 2,000 scientific papers.

Deep-sea exploration

Deep-sea exploration is the investigation of physical, chemical, and biological conditions on the sea bed, for scientific or commercial purposes. Deep-sea exploration is considered a relatively recent human activity compared to the other areas of geophysical research, as the depths of the sea have been investigated only during comparatively recent years. The ocean depths still remain a largely unexplored part of the planet, and form a relatively undiscovered domain.

In general, modern scientific Deep-sea exploration can be said to have begun when French scientist Pierre Simon de Laplace investigated the average depth of the Atlantic ocean by observing tidal motions registered on Brazilian and African coasts. He calculated the depth to be 3,962 metres (12,999 ft), a value later proven quite accurate by soundings measurement. Later on, with increasing demand for submarine cables installment, accurate soundings was required and the first investigations of the sea bottom were undertaken. The first deep-sea life forms were discovered in 1864 when Norwegian researchers obtained a sample of a stalked crinoid at a depth of 3,109 m (10,200 ft). The British Government sent out the Challenger expedition (a ship called HMS Challenger) in 1872 which discovered 715 new genera and 4,417 new species of marine organisms over the space of four years.The first instrument used for deep-sea investigation was the sounding weight, used by British explorer Sir James Clark Ross. With this instrument, he reached a depth of 3,700 m (12,139 ft) in 1840. The Challenger expedition used similar instruments called Baillie sounding machines to extract samples from the sea bed.In 1960, Jacques Piccard and United States Navy Lieutenant Donald Walsh descended in the bathyscaphe Trieste into the Mariana Trench, the deepest part of the world's oceans, to make the deepest dive in history: 10,915 m (35,810 ft). On 25 March 2012, filmmaker James Cameron descended into the Mariana Trench and, for the first time, is expected to have filmed and sampled the bottom.Navy Lieutenant Matthew Maury to aid installation of the first trans-continent telegraph cables in 1858, and a few examples of deep marine creatures.From 1872 to 1876, a landmark ocean study was carried out by British scientists aboard HMS Challenger, a sailing vessel that was redesigned into a laboratory ship. The Challenger expedition covered 127,653 kilometres (68,927 nmi), and shipboard scientists collected hundreds of samples, hydrographic measurements, and specimens of marine life. They are also credited with providing the first real view of major seafloor features such as the deep ocean basins. They discovered more than 4,700 new species of marine life, including deep-sea organisms.Deep-sea exploration advanced considerably in the 1900s thanks to a series of technological inventions, ranging from sonar system to detect the presence of objects underwater through the use of sound to manned deep-diving submersibles such as DSV Alvin. Operated by the Woods Hole Oceanographic Institution, Alvin is designed to carry a crew of three people to depths of 4,000 m (13,123 ft). The submarine is equipped with lights, cameras, computers, and highly maneuverable robotic arms for collecting samples in the darkness of the ocean's depths.However, the voyage to the ocean bottom is still a challenging experience. Scientists are working to find ways to study this extreme environment from the shipboard. With more sophisticated use of fiber optics, satellites, and remote-control robots, scientists one day may explore the deep sea from a computer screen on the deck rather than out of a porthole.

Deep-submergence vehicle

A deep-submergence vehicle (DSV) is a deep-diving manned submarine that is self-propelled. Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs (Deep Submergence Rescue Vehicle), which can be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions (primarily installing wiretaps on undersea cables), or both. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.

The real-life feasibility of any DSRV-based rescue attempt is hotly debated, because the few available docking chambers of a stricken submarine may be flooded, trapping the sailors still alive in other dry compartments. The only attempt to rescue a stricken submarine with these so far (the Russian submarine Kursk) ended in failure as the entire crew who survived the explosion had either suffocated or burned to death before the rescuers could get there. Because of these difficulties, the use of integrated crew escape capsules, detachable conning towers, or both have gained favour in military submarine design during the last two decades. DSRVs that remain in use are primarily relegated to clandestine missions and undersea military equipment maintenance. The rapid development of safe, cost-saving ROV technology has also rendered some DSVs obsolete.

Strictly speaking, bathyscaphes are not submarines because they have minimal mobility and are built like a balloon, using a habitable spherical pressure vessel hung under a liquid hydrocarbon filled float drum. In a DSV/DSRV, the passenger compartment and the ballast tank functionality is incorporated into a single structure to afford more habitable space (up to 24 people in the case of a DSRV).

Most DSV/DSRV vehicles are powered by traditional electric battery propulsion and have very limited endurance. Plans have been made to equip DSVs with LOX Stirling engines but none have been realized so far due to cost and maintenance considerations. All DSVs are dependent upon a surface support ship or a mother submarine, that can piggyback or tow them (in case of the NR-1) to the scene of operations. Some DSRV vessels are air transportable in very large military cargo planes to speed up deployment in case of emergency rescue missions.

Don Walsh

Don Walsh (born November 2, 1931) is an American oceanographer, explorer and marine policy specialist. He and Jacques Piccard were aboard the bathyscaphe Trieste when it made a record maximum descent into the Mariana Trench on January 23, 1960, the deepest point of the world's oceans. The depth was measured at 35,813 feet (10,916 m), but later and more accurate measurements have measured it at 35,798 feet (10,911 m).

FNRS-2

The FNRS-2 was the first bathyscaphe. It was created by Auguste Piccard. Work started in 1937 but was interrupted by World War II. The deep-diving submarine was finished in 1948. The bathyscaphe was named after the Belgian Fonds National de la Recherche Scientifique (FNRS), the funding organization for the venture. FNRS also funded the FNRS-1 which was a balloon that set a world altitude record, also built by Piccard. The FNRS-2 set world diving records, besting those of the bathyspheres, as no unwieldy cable was required for diving. It was in turn bested by a more refined version of itself, the bathyscaphe Trieste.

FNRS-2 was built during 1946-1948. She was damaged during sea trials in 1948, off the Cape Verde Islands. FNRS-2 was sold to the French Navy when FNRS funding ran low, in 1948. The French rebuilt and rebaptised her FNRS-3. She was eventually replaced by the FNRS-4. In February 1954 the FNRS-3 reached a depth of 4,050 metres (13,290 ft) in the Atlantic, 160 miles off Dakar, beating Piccard's 1953 record by 900 meters.

FNRS-3

The FNRS-3 or FNRS III is a bathyscaphe of the French Navy. It is currently preserved at Toulon. She set world depth records, competing against a more refined version of her design, the first bathyscaphe Trieste. The French Navy eventually replaced her with the bathyscaphe FNRS-4, in the 1960s.After damage to the FNRS-2 during its sea trials in 1948, FNRS ran out of funding, and the submersible was sold to the French Navy, in 1950. She was subsequently substantially rebuilt and improved at Toulon naval base, and renamed FNRS-3. She was relaunched in 1953, under the command of Georges Houot, a French naval officer.On 15 February 1954, she made a 4,050 metres (13,290 ft) dive 160 miles off Dakar, Senegal in the Atlantic Ocean, beating Piccard's 1953 record, set by the Trieste, by 900 meters. (the floor of the Mediterranean off Naples, 10,392 feet (3,167 m)) This record was not exceeded until a workup dive by Trieste in 1959, working up to the record shattering Challenger Deep dive.

Jacques Piccard

Jacques Piccard (28 July 1922 – 1 November 2008) was a Swiss oceanographer and engineer, known for having developed underwater submarines for studying ocean currents. In the Challenger Deep, he and Lt. Don Walsh of the United States Navy were the first people to explore the deepest part of the world's ocean, and the deepest location on the surface of Earth's crust, the Mariana Trench, located in the western North Pacific Ocean.

Navy Electronics Laboratory

The U.S. Navy Electronics Laboratory (NEL) was created in 1945, with consolidation of the naval radio station, radar operators training school, and radio security activity of the Navy Radio and Sound Lab (NRSL) and its wartime partner, the University of California Division of War Research. NEL’s charter was “to effectuate the solution of any problem in the field of electronics, in connection with the design, procurement, testing, installation and maintenance of electronic equipment for the U.S. Navy.” Its radio communications and sonar work was augmented with basic research in the propagation of electromagnetic energy in the atmosphere and of sound in the ocean.

Rainbowfish-class bathyscaphe

The Rainbowfish class bathyscaphe is a Chinese deep submergence vehicle under development in 2015 and originally scheduled to enter service in 2019. The Rainbowfish is a second generation bathyscaphe designed to be able to dive to a depth of 11 km, effectively covering 100% of the oceanic floor. The general designer is Mr. Cui Weicheng (崔维成), who was the first deputy general designer of the first generation bathyscaphes Sea Pole and Jiaolong. Unlike other Chinese deep submergence vehicles developed earlier, the Rainbowfish was developed under a new business model, raising capital from private enterprise.The Rainbowfish class bathyscaphe is designed to have an endurance of ten hours, with ascent and descent each taking two hours, thus leaving a total of six hours of endurance to conduct research at the sea floor. The bathyscaphe is powered by Lithium-ion batteries and the flotation material is developed by Chinese firm China Haohua Chemical Group, with development successfully completed at the end of 2014. Most of the subsystems of Rainbowfish bathyscaphe such as underwater electric motor, high pressure seawater pump and integrated propulsion system are developed from earlier Jiaolong bathyscaphe. Although many subsystems can be 100% manufactured in China, there are some critical subsystems that had to be manufactured abroad due to the limitation of Chinese industrial and technical bottleneck, despite being indigenously designed in China. One of such subsystem is the capsule housing the crew. During the design stage of the development, it was discovered that the TC4 titanium alloy used on earlier Sea Pole and Jiaolong bathyscaphe are not good candidate for Rainbowfish, because the thickness required would be 110 mm, which would be extremely difficult to build. As a result, alternative material is needed, and the design settled on Martensitic stainless steel. However, existing Chinese capability can only provide the manufacture of capsule capable of diving to a maximum depth of 4500 meter, so foreign assistance was needed with Finnish firm selected due to Finnish experience in construction of deep submergence vehicles. Finnish experts concluded that the Chinese design was feasible after thorough review, both sides are finalizing the deal in the mid 2015, with the completion of the capsule scheduled in 2016. Plans are mde to have future capsules manufactured in China by increasing domestic Chinese capability with governmental support. The mother ship carrying Rainbowfish bathyscaphe will be Chinese oceanographic research ship Zhang Jian.An extremely crude full-scale model was displayed in public in May 2016 and it was reported that launch date had slipped to 2020.

Sea Pole-class bathyscaphe

The Sea Pole (Hai Ji, or Chinese: 海极) class bathyscaphe is a class of bathyscaphe of the People's Republic of China (PRC). They are capable of diving up to 7,000 meters, covering 99.8% of the oceanic floor of the world. Two units of this class are planned, with derivatives to follow and are used by both the civilian and military establishments in China.

Soleidae

The true soles are a family, Soleidae, of flatfishes. It includes saltwater and brackish water species in the East Atlantic, Indian Ocean, and West and Central Pacific Ocean. Freshwater species are found in Africa, southern Asia, New Guinea, and Australia.

In the past, soles of the Americas (both fresh and salt water) were included in this family, but they have been separated to their own family, the American soles (Achiridae). The only true sole remaining in that region is Aseraggodes herrei of the Galápagos and Cocos Island.The true soles are bottom-dwelling fishes feeding on small crustaceans and other invertebrates. The family contains 30 genera and a total of about 180 species.

Soles begin life as bilaterally symmetric larvae, with an eye on each side of the head, but during development, the left eye moves around onto the right side of the head. Adult soles lie on their left (blind) sides on the sea floor, often covered in mud, which in combination with their dark colours, makes them hard to spot.

A flatfish resembling a small halibut or sole was observed by the Bathyscaphe Trieste at the bottom of the Mariana Trench at a depth around 11 km (36,000 ft). This observation has been questioned by fish experts, and recent authorities do not recognize it as valid.Many soles are important food species: the common sole, Solea solea, is popular in northern Europe and the Mediterranean.

The World of Narue

The World of Narue (Japanese: 成恵の世界, Hepburn: Narue no Sekai) is a Sci-Fi manga and anime series about Kazuto Izuka, a fourteen-year-old boy who meets a somewhat weird but cute and independent girl named Narue Nanase, who claims she is an alien. The show is about the trials and tribulations of the young couple as they get to know each other. The title is taken from A. E. van Vogt's The World of Null-A (Japanese title: 非Aの世界 Naru ē no Sekai).

The manga, spanning 12 volumes as of August 2011, is authored by Tomohiro Marukawa and published by Kadokawa Shoten since 2000. The manga was licensed in North America by the now-defunct CPM Manga. In 2014, the manga received the Seiun Award for Best Comic.The anime series ran on MBS between April 4, 2003 and June 28, 2003 and is 12 episodes long. Central Park Media licensed and released it in a four-disc DVD collection in 2004 under their US Manga Corps label. Following the 2009 bankruptcy and liquidation of Central Park Media, ADV Films picked up the anime series for release on July 21, 2009. Following the closure of A.D. Vision, the series is now distributed by successors Section23 Films and Æsir Holdings.

USS Apache (ATF-67)

USS Apache (AT-67/ATF-67) was a Navajo-class fleet tug, later fleet ocean tug, in commission in the United States Navy from 1942 to 1946 and from 1951 to 1974. She saw service in World War II, the Korean War, and the Vietnam War.

USS Wandank (ATA-204)

The second USS Wandank (ATA-204), originally USS ATA-204, was a United States Navy auxiliary ocean tug in commission from 1945 to 1947 and again from 1952 to 1971. The ship is possibly best known for supporting scientific operations in the Marianas, in particular serving as communication relay and support ship for the bathyscaphe Trieste in Project Nekton; she towed the bathyscaphe some 260 nautical miles (482 kilometers) from Guam to the vicinity of the Challenger Deep, where, on 23 January 1960, Trieste descended to a record 37,000 feet (11,278 meters).

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