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Italian Submarine Gemma
Italian submarine ''Gemma'' was a built for the Royal Italian Navy (''Regia Marina'') during the 1930s. Her name in Italian means a gemstone or jewel. Design and description The ''Perla''-class submarines were essentially repeats of the preceding . The modifications that were made compared to the boats of the previous series were mostly of upgrade nature. Among them were enlargement of the false tower at the top, more modern engines, installation of a radiogoniometer that could be controlled from inside the ship. Improvements and the installation of new air conditioning equipment meant a slight increase in displacement, and increase in the fuel stowage also increased the autonomy of these boats compared to the previous series.Pollina, p.155 Their designed full load displacement was surfaced and submerged, but varied somewhat depending on the boat and the builder. The submarines were long, had a beam of and a draft of to .Bagnasco, p. 153Pollina, pp.152-153 For surface runni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemma Smg
Gemma or GEMMA may refer to: People and fictional characters * Gemma (given name), includes a list of people and fictional characters with the name * Gemma (surname), includes a list of people with the name Science and technology Biology * Gemma (botany), an asexual reproductive structure in plants and fungi * A monotypic genus of the Veneridae family of saltwater clams ** ''Gemma gemma'', the type species * A bud-like appendage in ants of the ''Diacamma'' genus Other uses in science and technology * Walter Gemma, a radial aero engine manufactured by Walter Aircraft Engines in the early 1930 * Gas phase electrophoretic molecular mobility analysis (GEMMA), a chemical analysis technique * Gemma, the traditional name for the binary star Alpha Coronae Borealis * Gemma, an Arduino-compatible microcontroller designed by Limor Fried Ships * Italian submarine ''Gemma'' * , a Dutch coastal tanker lost in 1951 * , a German cargo ship in service during 1928 Other uses * Gemma (organisat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam (nautical)
The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer extremities of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water. Generally speaking, the wider the beam of a ship (or boat), the more initial stability it has, at the expense of secondary stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. A ship that heels on her ''beam ends'' has her deck beams nearly vertical. Typical values Typical length-to-beam ratios ( aspect ratios) for small sailboats are from 2:1 (dinghies to trailerable sailboats around ) to 5:1 (racing sailboats over ). Large ships have widely varying beam ratios, some as large as 20:1. Rowing shells designed for flatwater racing may have length to beam ratios as high as 30:1, while a cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Ocean
The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by the Southern Ocean or Antarctica, depending on the definition in use. Along its core, the Indian Ocean has some large marginal or regional seas such as the Arabian Sea, Laccadive Sea, Bay of Bengal, and Andaman Sea. Etymology The Indian Ocean has been known by its present name since at least 1515 when the Latin form ''Oceanus Orientalis Indicus'' ("Indian Eastern Ocean") is attested, named after Indian subcontinent, India, which projects into it. It was earlier known as the ''Eastern Ocean'', a term that was still in use during the mid-18th century (see map), as opposed to the ''Western Ocean'' (Atlantic Ocean, Atlantic) before the Pacific Ocean, Pacific was surmised. Conversely, Ming treasure voyages, Chinese explorers in the Indian Oce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eritrea
Eritrea ( ; ti, ኤርትራ, Ertra, ; ar, إرتريا, ʾIritriyā), officially the State of Eritrea, is a country in the Horn of Africa region of Eastern Africa, with its capital and largest city at Asmara. It is bordered by Ethiopia in the south, Sudan in the west, and Djibouti in the southeast. The northeastern and eastern parts of Eritrea have an extensive coastline along the Red Sea. The nation has a total area of approximately , and includes the Dahlak Archipelago and several of the Hanish Islands. Human remains found in Eritrea have been dated to 1 million years old and anthropological research indicates that the area may contain significant records related to the evolution of humans. Contemporary Eritrea is a multi-ethnic country with nine recognised ethnic groups. Nine different languages are spoken by the nine recognised ethnic groups, the most widely spoken language being Tigrinya, the others being Tigre, Saho, Kunama, Nara, Afar, Beja, Bilen and Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massawa
Massawa ( ; ti, ምጽዋዕ, məṣṣəwaʿ; gez, ምጽዋ; ar, مصوع; it, Massaua; pt, Maçuá) is a port city in the Northern Red Sea region of Eritrea, located on the Red Sea at the northern end of the Gulf of Zula beside the Dahlak Archipelago.Matt Phillips, Jean-Bernard Carillet, ''Lonely Planet Ethiopia and Eritrea'', (Lonely Planet: 2006), p.340. It has been a historically important port for many centuries. Massawa was the capital of the Italian Colony of Eritrea until the seat of the colonial government was moved to Asmara in 1897. Massawa has an average temperature of nearly , which is one of the highest experienced in the world, and is "one of the hottest marine coastal areas in the world." History Massawa was originally a small seaside village, lying in lands coextensive with the Kingdom of Axum—also known as Kingdom of Zula in antiquity—and overshadowed by the nearby port of Adulis about to the south. Massawa has been ruled or occupied by a successi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Sea
The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; Tigrinya: ቀይሕ ባሕሪ ''Qeyih Bahri''; ) is a seawater inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab el Mandeb strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez (leading to the Suez Canal). It is underlain by the Red Sea Rift, which is part of the Great Rift Valley. The Red Sea has a surface area of roughly 438,000 km2 (169,100 mi2), is about 2250 km (1398 mi) long, and — at its widest point — 355 km (220.6 mi) wide. It has an average depth of 490 m (1,608 ft), and in the central ''Suakin Trough'' it reaches its maximum depth of . The Red Sea also has exten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augusta, Sicily
Augusta (, archaically ''Agosta''; scn, Austa ; Greek and la, Megara Hyblaea, Medieval: ''Augusta'') is a town and in the province of Syracuse, located on the eastern coast of Sicily (southern Italy). The city is one of the main harbours in Italy, especially for oil refineries ( Sonatrach and others as part of the complex Augusta-Priolo) which are in its vicinity. Geography The city is situated in the province of Syracuse and faces the Ionian Sea. The old town is an island, made in the 16th century by cutting an isthmus and is connected to the mainland by two bridges. One bridge was built recently (Viaduct Frederick II of Swabia) and the other was built when the city was founded and is called the Porta Spagnola. Augusta is home to two ports. History Founded 27 centuries ago, Megara Hyblaea is one of the oldest Greek colonies of Sicily. It was destroyed by its rival Syracuse, was raised from its ruins, then taken by the Romans together with Syracuse during the Second Punic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanish Civil War
The Spanish Civil War ( es, Guerra Civil Española)) or The Revolution ( es, La Revolución, link=no) among Nationalists, the Fourth Carlist War ( es, Cuarta Guerra Carlista, link=no) among Carlists, and The Rebellion ( es, La Rebelión, link=no) or The Uprising ( es, La Sublevación, link=no) among Republicans. was a civil war in Spain fought from 1936 to 1939 between the Republicans and the Nationalists. Republicans were loyal to the left-leaning Popular Front government of the Second Spanish Republic, and consisted of various socialist, communist, separatist, anarchist, and republican parties, some of which had opposed the government in the pre-war period. The opposing Nationalists were an alliance of Falangists, monarchists, conservatives, and traditionalists led by a military junta among whom General Francisco Franco quickly achieved a preponderant role. Due to the international political climate at the time, the war had many facets and was variously viewed as cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strait Of Sicily
The Strait of Sicily (also known as Sicilian Strait, Sicilian Channel, Channel of Sicily, Sicilian Narrows and Pantelleria Channel; it, Canale di Sicilia or the Stretto di Sicilia; scn, Canali di Sicilia or Strittu di Sicilia, ar, مضيق صقلية ' or ') is the strait between Sicily and Tunisia. The strait is about wide and divides the Tyrrhenian Sea and the western Mediterranean Sea, from the eastern Mediterranean Sea. The maximum depth is . Deep currents in the strait flow from east to west, and the current nearer the surface travels from west to east. This unusual water flow is of interest to oceanographers. There are regular ferries between Sicily and Tunis across the Strait of Sicily. The island of Pantelleria lies in the middle of the strait. The Strait of Sicily is located between, at the eastern side, Tunisia and the Malta Bank and on the northern side, Sicily, Italy. Within the Central Mediterranean sea it is one of the topographically complex regions. With ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dodecanese
The Dodecanese (, ; el, Δωδεκάνησα, ''Dodekánisa'' , ) are a group of 15 larger plus 150 smaller Greek islands in the southeastern Aegean Sea and Eastern Mediterranean, off the coast of Turkey's Anatolia, of which 26 are inhabited. This island group generally defines the eastern limit of the Sea of Crete. They belong to the wider Southern Sporades island group. Rhodes has been the area's dominant island since antiquity. Of the others, Kos and Patmos are historically the more important; the remaining twelve are Agathonisi, Astypalaia, Halki, Kalymnos, Karpathos, Kasos, Leipsoi, Leros, Nisyros, Symi, Tilos, and Kastellorizo. Other islands in the chain include Alimia, Arkoi, Farmakonisi, Gyali, Kinaros, Levitha, Marathos, Nimos, Pserimos, Saria, Strongyli and Syrna. Name The name "Dodecanese" (older form ἡ Δωδεκάνησος, ''hē Dōdekanēsos''; modern τα Δωδεκάνησα, ''ta Dōdekanēsa''), meaning "The Twelve Islands", or ''Oniki Adalar'' in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Messina
Messina (, also , ) is a harbour city and the capital of the Italian Metropolitan City of Messina. It is the third largest city on the island of Sicily, and the 13th largest city in Italy, with a population of more than 219,000 inhabitants in the city proper and about 650,000 in the Metropolitan City. It is located near the northeast corner of Sicily, at the Strait of Messina and it is an important access terminal to Calabria region, Villa San Giovanni, Reggio Calabria on the mainland. According to Eurostat the FUA of the metropolitan area of Messina has, in 2014, 277,584 inhabitants. The city's main resources are its seaports (commercial and military shipyards), cruise tourism, commerce, and agriculture (wine production and cultivating lemons, oranges, mandarin oranges, and olives). The city has been a Roman Catholic Archdiocese and Archimandrite seat since 1548 and is home to a locally important international fair. The city has the University of Messina, founded in 1548 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Naming And Launching
Ceremonial ship launching involves the performance of ceremonies associated with the process of transferring a vessel to the water. It is a nautical tradition in many cultures, dating back thousands of years, to accompany the physical process with ceremonies which have been observed as public celebration and a solemn blessing, usually but not always, in association with the launch itself. Ship launching imposes stresses on the ship not met during normal operation and, in addition to the size and weight of the vessel, represents a considerable engineering challenge as well as a public spectacle. The process also involves many traditions intended to invite good luck, such as christening by breaking a sacrificial bottle of champagne over the bow as the ship is named aloud and launched. Methods 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 used is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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