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Melbourne–Voyager Collision
The ''Melbourne''–''Voyager'' collision, also known as the ''Melbourne''–''Voyager'' incident or simply the ''Voyager'' incident, was a collision between two warships of the Royal Australian Navy (RAN); the aircraft carrier and the destroyer . On the evening of 10 February 1964, the two ships were performing manoeuvres off Jervis Bay. ''Melbourne'' aircraft were performing flying exercises, and ''Voyager'' had been given the task of plane guard, and was positioned behind and to port (left) of the carrier in order to rescue the crew of any ditching or crashing aircraft. After a series of turns effected to reverse the courses of the two ships, ''Voyager'' ended up ahead and to starboard (right) of the carrier. The destroyer was ordered to resume plane guard position, which would involve turning to starboard, away from the carrier, then looping around behind. Instead, ''Voyager'' began a starboard turn, but then came around to port. The bridge crew on ''Melbourne'' correctly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jervis Bay
Jervis Bay () is a oceanic bay and village in the Jervis Bay Territory and on the South Coast (New South Wales), South Coast of New South Wales, Australia. A area of land around the southern headland of the bay, known as the Jervis Bay Territory, is not a part of the Australian Capital Territory (which it is administered by). The Territory includes the settlements of Jervis Bay Village and Wreck Bay Village. The Royal Australian Navy (RAN) base, , is in the Jervis Bay Territory between Jervis Bay Village and Greenpatch Point. History Archaeological finds at Burrill Lake, New South Wales, Burrill Lake, 55 kilometres south of Jervis Bay, provide evidence of Aboriginal occupation dating back 20,000 years. In the Dhurga language, spoken by local Aboriginal Australians, Aboriginal inhabitants, the bay was known as "Booderee", meaning "bay of plenty". Jervis Bay was sighted by Lieutenant (navy), Lieutenant James Cook aboard on 25 April 1770, two days after Saint George's Day, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Displacement (ship)
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used. Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below. Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage. Calculation The process of determining a vessel's displacement begins with measuring its draft.George, 2005. p. 5. This is accomplished by means of its "draft marks". A merchant vessel has t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operations Room
A control room or operations room is a central space where a large physical facility or physically dispersed service can be monitored and controlled. It is often part of a larger command center. Overview A control room's purpose is production control, and serves as a central space where a large physical facility or physically dispersed service can be monitored and controlled. Central control rooms came into general use in factories during the 1920s. Control rooms for vital facilities are typically tightly secured and inaccessible to the general public. Multiple electronic displays and control panels are usually present, and there may also be a large wall-sized display area visible from all locations within the space. Some control rooms are themselves under continuous video surveillance and recording, for security and personnel accountability purposes. Many control rooms are occupied on a " 24/7/365" basis, and may have multiple people on duty at all times (such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superstructure
A superstructure is an upward extension of an existing structure above a baseline. This term is applied to various kinds of physical structures such as buildings, bridges, or ships. Aboard ships and large boats On water craft, the superstructure consists of the parts of the ship or a boat, including sailboats, fishing boats, passenger ships, and submarines, that project above her main deck. This does not usually include its Mast (sailing), masts or any armament gun turret, turrets. Note that, in modern times, turrets do not always carry naval artillery. They can also carry missile launchers and/or antisubmarine warfare weapons. The size of a watercraft's superstructure can have many implications in the performance of ships and boats, since these structures can alter their structural rigidity, their displacements, and/or stability. These can be detrimental to any vessel's performance if they are taken into consideration incorrectly. The height and the weight of superstructure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMAS Melbourne Damage
His Majesty's Australian Ship (HMAS) (or Her Majesty's Australian Ship when the monarch is female) is a ship prefix used for commissioned units of the Royal Australian Navy (RAN). This prefix is derived from HMS (Her/His Majesty's Ship), the prefix used by the Royal Navy of the United Kingdom, and can be equally applied to warships and shore bases (as Australia follows the British tradition of referring to naval establishments as stone frigates). By the early 21st century, especially when RAN vessels were deployed as part of international coalitions, an unofficial, alternative prefix was sometimes used: "Australian navy ship" (which was not abbreviated). This was typically used in communications at sea with other navies or merchant vessels. This avoided any confusion that may have resulted from RAN ("HMAS") vessels serving alongside British RN ("HMS)" vessels and/or those of other Commonwealth navies. On 10 July 1911, King George V granted the title of Royal Australian Navy to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelorus (instrument)
In marine navigation, a pelorus is a reference tool for maintaining bearing of a vessel at sea. It is a "simplified compass" without a directive element, suitably mounted and provided with vanes to permit observation of relative bearings. The instrument was named for one Pelorus, said to have been the pilot for Hannibal, circa 203 BC. Ancient use Harold Gatty described the use of a pelorus by Polynesians before the use of a compass. In equatorial waters the nightly course of stars overhead is nearly uniform during the year. This regularity simplified navigation for the Polynesians using a pelorus, or dummy compass: Reading from North to South, in their rising and setting positions, these stars are:List comes from Tolmacheva (1980:p. 183), based "with some reservations" on Tibbets (1971: p. 296, n. 133). The sidereal rose given in Lagan (2005p.66 has some differences, e.g. placing Orion's belt in East and Altair in EbN. : The true position of these stars is only approxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Night Vision
Night vision is the ability to see in low-light conditions, either naturally with scotopic vision or through a night-vision device. Night vision requires both sufficient spectral range and sufficient intensity range. Humans have poor night vision compared to many animals such as cats, dogs, foxes and rabbits, in part because the human eye lacks a tapetum lucidum, tissue behind the retina that reflects light back through the retina thus increasing the light available to the photoreceptors. Types of ranges Spectral range Night-useful spectral range techniques can sense radiation that is invisible to a human observer. Human vision is confined to a small portion of the electromagnetic spectrum called visible light. Enhanced spectral range allows the viewer to take advantage of non-visible sources of electromagnetic radiation (such as near-infrared or ultraviolet radiation). Some animals such as the mantis shrimp and trout can see using much more of the infrared and/or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Officer Of The Watch
Watchkeeping or watchstanding is the assignment of sailors to specific roles on a ship to operate it continuously. These assignments, also known at sea as ''watches'', are constantly active as they are considered essential to the safe operation of the vessel and also allow the ship to respond to emergencies and other situations quickly. These watches are divided into work periods to ensure that the roles are always occupied at all times, while those members of the crew who are assigned to work during a watch are known as ''watchkeepers''. On a typical seafaring vessel, be it naval or merchant, personnel "keep a watch" in various locations and duties across the ship, such as the Bridge (nautical), bridge and engine room. Typical bridge watchkeepers include a lookout and a deck officer who is responsible for the safe navigation of the ship; whereas in the engine room, an engine officer ensures that running machinery continues to operate within tolerances. Types of watches A wide v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zig-zag
A zigzag is a pattern made up of small corners at variable angles, though constant within the zigzag, tracing a path between two parallel lines; it can be described as both jagged and fairly regular. In geometry, this pattern is described as a skew apeirogon. From the point of view of symmetry, a regular zigzag can be generated from a simple motif like a line segment by repeated application of a glide reflection. Although the origin of the word is unclear, its first printed appearances were in French-language books and ephemera of the late 17th century. Examples of zigzags * The trace of a triangle wave or a sawtooth wave is a zigzag. * Pinking shears are designed to cut cloth or paper with a zigzag edge, to lessen fraying. * In sewing, a ''zigzag stitch'' is a machine stitch in a zigzag pattern. * The zigzag arch is an architectural embellishment used in Islamic, Byzantine, Norman and Romanesque architecture. * In seismology, earthquakes recorded in a "zigzag line" form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Williamstown Naval Dockyard
Williamstown Dockyard was one of Australia's principal ship building yards at Williamstown, Victoria, Australia. The Colony of Victoria decided to construct a large slipway at Williamstown to provide ship repair facilities in 1856 and the Government Patent Slip was opened in 1858. Slip Pier was built in 1858 and was used in conjunction with the Government Patent Slip. The Slip Pier was later known as the Lady Loch Jetty after the similarly named Government steamer. The pier and Government Patent Slipway were demolished in 1919. In 1858, the Colony of Victoria decided to build a graving dock and dockyard. Construction commenced in 1868, and was completed in February 1874. The Alfred Graving Dock, named after Alfred, Duke of Edinburgh, was built at a cost of £300,000. The graving dock was in length, wide, deep. The dock was designed by William Wardell for the Public Works Department (Victoria), and it was the largest structure of its type in the southern hemisphere. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Far East Strategic Reserve
The British Commonwealth Far East Strategic Reserve (commonly referred to as the ''Far East Strategic Reserve'' or the ''FESR'') was a joint military force of the British, Australian, and New Zealand armed forces. Created in the 1950s and based in Malaya, the FESR was conceived as a forward defence point for Australia and New Zealand, while protecting Commonwealth interests in the Southeast Asian region from both internal and external communist threats. The FESR was made up of an infantry brigade and an aircraft carrier group, supported by squadrons of aircraft. Creation The FESR originated from a June 1953 letter from Harold Alexander, the British Minister of Defence, to Philip McBride and Tom Macdonald, his equivalents in Australia and New Zealand ministries, respectively.Pfennigwerth, 2008, p. 55 The letter suggested the creation of a joint military force based in South-East Asia and tasked with protecting strategically important Commonwealth interests in the region (name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cockatoo Island Dockyard
The Cockatoo Island Dockyard was a major dockyard in Sydney, Australia, based on Cockatoo Island. The dockyard was established in 1857 to maintain Royal Navy warships. It later built and repaired military and battle ships, and played a key role in sustaining the Royal Australian Navy. The dockyard was closed in 1991, and its remnants are heritage listed as the Cockatoo Island Industrial Conservation Area. Colonial ownership It was established by the colonial Government of New South Wales, commencing operations in December 1857 with the opening of Fitzroy Dock. Planning had begun as early as May 1846, when Governor George Gipps had recommended the construction of a dry dock at Cockatoo Island to the British government to service Royal Navy vessels. Construction had begun in 1851, with Captain Gother Mann as engineer-in-chief, and taken six years. It was known as the Government Dockyard – Biloela while in colonial control. Shipbuilding facilities, such as slipways and workshop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
