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USCGC Alert (WMEC-127)
USCGC ''Alert'' (WMEC-127) was a United States Coast Guard medium endurance cutter and was the fourth cutter to carry the name. She was launched on 30 November 1926, commissioned 27 January 1927, and finally decommissioned 10 January 1969. The ship was brought to Portland, Oregon Portland (, ) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populou ... in 2006 and moored at Hayden Island with plans to turn it into a museum ship. Walt James, the founder of the nonprofit Columbia Watershed Environmental Advocates had planned to restore it but died before that could occur and the group was waived of responsibility for it, according to the U.S. Coast Guard. While moored at Hayden Island, the ''Alert'' was part of a growing homeless encampment, named the "Pirates of the Columbia", due to criminal activity a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Call Sign
Maritime call signs are call signs assigned as unique identifiers to ships and boats. All radio transmissions must be individually identified by the call sign. Merchant and naval vessels are assigned call signs by their national licensing authorities. History One of the earliest applications of radiotelegraph operation, long predating broadcast radio, were marine radio stations installed aboard ships at sea. In the absence of international standards, early transmitters constructed after Guglielmo Marconi's first trans- Atlantic message in 1901 were issued arbitrary two-letter calls by radio companies, alone or later preceded by a one-letter company identifier. These mimicked an earlier railroad telegraph convention where short, two-letter identifiers served as Morse code Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3"/23 Caliber Gun
The 3"/23 caliber gun (spoken "three-inch-twenty-three-caliber") was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm) in diameter, and the barrel was 23 calibers long (barrel length is 3" x 23 = 69" or 1.75 meters.) Description The built-up gun with vertical sliding breech block weighed about 531 pounds (241 kg) and used fixed ammunition (case and projectile handled as a single assembled unit) with a 13-pound (6 kg) projectile at a velocity of 1650 feet per second (500 m/s).Campbell 1985 p.146 Range was 10100 yards (9235 meters) at 45 degrees elevation. Ceiling was 18000 feet (5500 meters) at the maximum elevation of 75 degrees.Campbell 1985 p.146 History The 3"/23 caliber cannon was the first purposely-designed anti-aircraft cannon to reach operational service in the US military, and was a further development of a 1 poun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depth Charge
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. Depth charges were developed during World War I, and were one of the first viable methods of attacking a submarine underwater. They were widely used in World War I and World War II, and remained part of the anti-submarine arsenals of many navies during the Cold War, during which they were supplemented, and later largely replaced, by anti-submarine homing torpedoes. A depth charge fitted with a nuclear warhead is also known as a " nuclear depth bomb". These were designed to be dropped from a patrol plane or deployed by an anti-submarine missile from a surface ship, or a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bofors 40 Mm Automatic Gun L/60
The Bofors 40 mm Automatic Gun L/60 (often referred to simply as the "Bofors 40 mm gun", the "Bofors gun" and the like, see name) is an anti-aircraft autocannon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. The gun was designed as an intermediate anti-aircraft gun, filling the gap between fast firing close-range small calibre anti-aircraft guns and slower firing long-range high calibre anti-aircraft guns, a role which previously was filled by older outdated guns. The Bofors 40 mm L/60 was for its time perfectly suited for this role and outperformed competing designs in the years leading up to World War II in both effectiveness and reliability. It entered the export market around 1932 and was in service with 18 countries by 1939. Throughout World War II it became one of the most popular and widespread medium-weight anti-aircraft guns. It was used by the majority of the western Allies and some Axis powers such as Nazi Germany and Hungary. In th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20 Mm Oerlikon
The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used today. Blowback-operated models History Origins During World War I, the German industrialist Reinhold Becker developed a 20 mm caliber cannon, known now as the 20 mm Becker using the advanced primer ignition blowback (API blowback) method of operation. This used a 20×70mmRB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a limited scale as an aircraft gun on ''Luftstreitkräfte'' warplanes, and an anti-aircraft gun towards the end of that war. Because the Treaty of Versailles banned further production of such weapons in Germany, the patents and design works were transferred in 1919 to the Swiss firm SEMAG (''Seebac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mousetrap (weapon)
Mousetrap (ASW Marks 20 and 22) was an anti-submarine rocket used mainly during World War II by the United States Navy and Coast Guard. Its development began in 1941 as a replacement for Hedgehog, a British-made projector, which was the first forward-throwing ASW weapon. Those, however, were spigot A tap (also spigot or faucet: see usage variations) is a valve controlling the release of a liquid or gas. Nomenclature United Kingdom * Tap is used in the United Kingdom and most of the Commonwealth for any everyday type of valve, parti ...-launched, placing considerable strain on the launching vessel's deck (ship), deck, whereas Mousetrap was rocket-propelled. As a result, Mousetrap's four or eight rails for rockets saved weight and were easier to install. The rockets weighed each, with a Torpex warhead and contact pistol, exactly like Hedgehog. By the end of the war, over 100 Mousetrap Mark 22s were mounted in U.S. Navy ships, including three each on 12 destroyers, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, multi-mission service unique among the United States military branches for having a maritime law enforcement mission with jurisdiction in both domestic and international waters and a federal regulatory agency mission as part of its duties. It is the largest and most powerful coast guard in the world, rivaling the capabilities and size of most navies. The U.S. Coast Guard is a humanitarian and security service. It protects the United States' borders and economic and security interests abroad; and defends its sovereignty by safeguarding sea lines of communication and commerce across vast territorial waters spanning 95,000 miles of coastline and its Exclusive Economic Zone. With national and economic security depending upon open global t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium Endurance Cutter
The Medium Endurance Cutter or WMEC is a type of United States Coast Guard Cutter mainly consisting of the Famous- and ''Reliance''-class cutters. These larger cutters are under control of Area Commands (Atlantic Area or Pacific Area). These cutters have adequate accommodations for crew to live on board and can do 6 to 8 week patrols. Other ships in the WMEC classification are the , and the now-decommissioned , and , and which began as the United States Navy launched in 1943. There are 13 vessels in the Famous class, and 14 vessels still in active US service in the ''Reliance'' class. The Coast Guard plans to eventually phase out the vessels in both of these cutter classes and replace them with the Offshore Patrol Cutter as part of the Integrated Deepwater System Program. History After World War II, the United States Coast Guard used the US Navy hull classification system. The large, sea-going cutters were classified primarily as Coast Guard gunboats (WPG), destroyer e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland, Oregon
Portland (, ) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populous county in Oregon. Portland had a population of 652,503, making it the 26th-most populated city in the United States, the sixth-most populous on the West Coast, and the second-most populous in the Pacific Northwest, after Seattle. Approximately 2.5 million people live in the Portland metropolitan statistical area (MSA), making it the 25th most populous in the United States. About half of Oregon's population resides within the Portland metropolitan area. Named after Portland, Maine, the Oregon settlement began to be populated in the 1840s, near the end of the Oregon Trail. Its water access provided convenient transportation of goods, and the timber industry was a major force in the city's early economy. At the turn of the 20th centu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hayden Island
Hayden Island is an island in the Columbia River between Vancouver, Washington, and Portland, Oregon. The wide main channel of the Columbia (and the Washington–Oregon state line) passes north of the island. To the south, sheltered by the island, is a smaller channel known as North Portland Harbor. Much of Hayden Island (and connected Tomahawk Island to the east) is within Portland city limits, and recognized as one of its 95 neighborhoods. Interstate 5 provides the only roadway connection to the island, via the northernmost Oregon exit, to the rest of North Portland and, with the Interstate Bridge, to Vancouver to the north. The BNSF Railway crosses North Portland Harbor (via the Oregon Slough Railroad Bridge) and the western part of the island to the west of I-5, before crossing the Columbia via the Burlington Northern Railroad Bridge 9.6. The east end of the island, often called Jantzen Beach, has highly developed retail areas near the freeway, hotels, offices, manufactured ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ships Of The United States Coast Guard
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity, and purpose. Ships have supported exploration, trade, warfare, migration, colonization, and science. After the 15th century, new crops that had come from and to the Americas via the European seafarers significantly contributed to world population growth. Ship transport is responsible for the largest portion of world commerce. The word ''ship'' has meant, depending on the era and the context, either just a large vessel or specifically a ship-rigged sailing ship with three or more masts, each of which is square-rigged. As of 2016, there were more than 49,000 merchant ships, totaling almost 1.8 billion dead weight tons. Of these 28% were oil tankers, 43% were bulk carriers, and 13% were c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active-class Patrol Boats
The ''Active''-class frigate was a 32-gun fifth-rate frigate class of eight ships designed by Edward Hunt to replace the design, which they resembled with a distinct midsection. Due to poor performance of the ''Active'' class, orders continued for the ''Amazon'' class. Description The ''Active'' class was designed with a gundeck, measuring at the keel, at the beam, and a draught of . They displaced tons burthen. The class was designed with an armament of 26 cannon on the gundeck, four guns on the quarterdeck with four carronades, and two 6 pdr guns and two 24 pdr carronades on the forecastle. Ships in class * - wrecked attempting to exit Castle Harbour, Bermuda, via Castle Roads Castle Roads is the primary channel by which vessels enter Castle Harbour, Bermuda, from the Atlantic Ocean. Although little used, today, except by pleasure boats, Castle Harbour was once an important anchorage, and an access route used by ships ... * – wrecked on Anticosti Island in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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