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33-601: RV Neil Armstrong (AGOR-27) is the designation for a new oceanographic research ship , first of the Neil Armstrong -class research vessels , to be owned by the United States Navy and operated by Woods Hole Oceanographic Institution . Secretary of the Navy Ray Mabus announced on September 24, 2012, that the research vessel was to be named after Neil Armstrong , the first person to walk on

66-503: A flash evaporation desalination system. This oceanography article is a stub . You can help Misplaced Pages by expanding it . This article about a specific ship or boat of the United States Armed Forces is a stub . You can help Misplaced Pages by expanding it . Oceanographic research ship The research ship had origins in the early voyages of exploration. By the time of James Cook 's Endeavour ,

99-489: A hazard to navigation such as rocks, shoals , reefs and other features that obstruct ship passage. Bottom measurements also include collection of the nature of the bottom as it pertains to effective anchoring. Unlike oceanography, hydrography will include shore features, natural and manmade, that aid in navigation. Therefore, a hydrographic survey may include the accurate positions and representations of hills , mountains and even lights and towers that will aid in fixing

132-434: A hydrographic survey vessel is CCGS Frederick G. Creed . For an example of the employment of a survey ship see HMS  Hydra . Oceanographic research vessels carry out research on the physical , chemical , and biological characteristics of water , the atmosphere , and climate , and to these ends carry equipment for collecting water samples from a range of depths, including the deep seas, as well as equipment for

165-421: A preference for multi-use surveys, so that the same data collected for nautical charting purposes can also be used for bathymetric portrayal. Even though, in places, hydrographic survey data may be collected in sufficient detail to portray bottom topography in some areas, hydrographic charts only show depth information relevant for safe navigation and should not be considered as a product that accurately portrays

198-621: A remit to gather and distribute charts to HM Ships. Within a year existing charts from the previous two centuries had been collated, and the first catalog published. The first chart produced under the direction of the Admiralty , was a chart of Quiberon Bay in Brittany , and it appeared in 1800. Under Captain Thomas Hurd the department received its first professional guidelines, and the first catalogs were published and made available to

231-640: A sectional flow rate of moving water through a section and or current. Uncrewed Surface Vessels (USVs) and are commonly used for hydrographic surveys - they are often equipped with some sort of sonar. Single-beam echosounders, multibeam echosounders , and side scan sonars are all frequently used in hydrographic applications. The knowledge gained from these surveys aid in disaster planning, port and harbor maintenance, and various other coastal planning activities. Hydrographic services in most countries are carried out by specialized hydrographic offices . The international coordination of hydrographic efforts lies with

264-488: A ship's position, as well as the physical aspects of the sea and seabed. Hydrography, mostly for reasons of safety, adopted a number of conventions that have affected its portrayal of the data on nautical charts. For example, hydrographic charts are designed to portray what is safe for navigation, and therefore will usually tend to maintain least depths and occasionally de-emphasize the actual submarine topography that would be portrayed on bathymetric charts . The former are

297-496: Is more commonly called hydrometry or hydrology . Hydrography of rivers and streams is also an integral part of water management. Most reservoirs in the United States use dedicated stream gauging and rating tables to determine inflows into the reservoir and outflows to irrigation districts, water municipalities and other users of captured water. River/stream hydrographers use handheld and bank mounted devices, to capture

330-409: Is powered by a multi-drive low-voltage diesel electric propulsion system for efficiency and lower maintenance and fuel costs. Both Neil Armstrong -class ships have state of the art oceanographic equipment allowing deep ocean mapping and information technology for ship monitoring and worldwide land-based communication. Neil Armstrong has more than 130 square meters of adjustable lab space, supplied by

363-491: The Endurance and Terra Nova . The names of early research vessels have been used to name later research vessels, as well as Space Shuttles . A hydrographic survey ship is a vessel designed to conduct hydrographic research and survey . Nautical charts are produced from this information to ensure safe navigation by military and civilian shipping . Hydrographic survey vessels also conduct seismic surveys of

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396-516: The Antarctic , where they function also as polar replenishment and supply vessels to the Antarctic research bases. Examples of polar research vessels include USCGC Polar Star , RSV Aurora Australis and RSV Nuyina . Oil exploration is performed in a number of ways, one of the most common being mobile drilling platforms or ships that are moved from area to area as needed to drill into

429-630: The International Hydrographic Organization . The United Kingdom Hydrographic Office is one of the oldest, supplying a wide range of charts covering the globe to other countries, allied military organizations and the public. In the United States, the hydrographic charting function has been carried out since 1807 by the Office of Coast Survey of the National Oceanic and Atmospheric Administration within

462-614: The NOAAS Ronald H. Brown and the Chilean Navy Cabo de Hornos . A fisheries research vessel requires platforms capable of towing different types of fishing nets , collecting plankton or water samples from a range of depths, and carrying acoustic fish-finding equipment. Fisheries research vessels are often designed and built along the same lines as a large fishing vessel , but with space given over to laboratories and equipment storage, as opposed to storage of

495-471: The hydrographic sounding of the seabed, along with numerous other environmental sensors. These vessels often also carry scientific divers and unmanned underwater vehicles . Since the requirements of both oceanographic and hydrographic research are very different from those of fisheries research, these boats often fulfill dual roles. Recent oceanographic research campaigns include GEOTRACES and NAAMES . Examples of an oceanographic research vessel include

528-422: The mariner 's tools to avoid accident. The latter are best representations of the actual seabed, as in a topographic map, for scientific and other purposes. Trends in hydrographic practice since c. 2003–2005 have led to a narrowing of this difference, with many more hydrographic offices maintaining "best observed" databases, and then making navigationally "safe" products as required. This has been coupled with

561-632: The Moon and a former naval aviator who served in the Korean War . The ship was ordered in May 2010 as a replacement for RV  Knorr , operated by Woods Hole Oceanographic Institution since 1970. The ship was constructed by Dakota Creek Industries of Anacortes, Washington and scheduled for completion in 2014 for entry into service in 2015. It was launched on 29 March 2014, christened by Carol Armstrong, passed sea trials 7 August 2015 and delivered to

594-558: The Navy on 23 September 2015. A sister ship, RV  Sally Ride  (AGOR-28) , was launched 9 August 2014 to be operated by Scripps Institution of Oceanography under a renewable charter-party agreement. Neil Armstrong is a commercially designed mono hull research vessel, capable of coastal and deep ocean oceanography operations, and equipped with cranes and winches for over-the-side loading of research equipment and supplies, as well as accommodations for twenty-four scientists. The ship

627-458: The actual shape of the bottom. The soundings selected from the raw source depth data for placement on the nautical chart are selected for safe navigation and are biased to show predominantly the shallowest depths that relate to safe navigation. For instance, if there is a deep area that can not be reached because it is surrounded by shallow water, the deep area may not be shown. The color filled areas that show different ranges of shallow water are not

660-536: The best data available and will caveat its nature in a caution note or in the legend of the chart. A hydrographic survey is quite different from a bathymetric survey in some important respects, particularly in a bias toward least depths due to the safety requirements of the former and geomorphologic descriptive requirements of the latter. Historically, this could include echosoundings being conducted under settings biased toward least depths, but in modern practice hydrographic surveys typically attempt to best measure

693-579: The catch. An example of a fisheries research vessel is FRV Scotia . Naval research vessels investigate naval concerns, such as submarine and mine detection or sonar and weapons trials. An example of a naval research vessel is the Planet of the German Navy . Polar research vessels are constructed around an icebreaker hull, allowing them to engage in ice navigation and operate in polar waters. These vessels usually have dual roles, particularly in

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726-507: The data are interchangeable, but marine hydrographic data will be particularly directed toward marine navigation and safety of that navigation. Marine resource exploration and exploitation is a significant application of hydrography, principally focused on the search for hydrocarbons . Hydrographical measurements include the tidal , current and wave information of physical oceanography. They include bottom measurements, with particular emphasis on those marine geographical features that pose

759-403: The depths observed, with the adjustments for navigational safety being applied after the fact. Hydrography of streams will include information on the stream bed, flows , water quality and surrounding land. Basin or interior hydrography pays special attention to rivers and potable water although if collected data is not for ship navigational uses, and is intended for scientific usage, it

792-581: The entire world, and produced over 130,000 charts annually, of which about half were sold. The word hydrography comes from the Ancient Greek ὕδωρ ( hydor ), "water" and γράφω ( graphō ), "to write". Large-scale hydrography is usually undertaken by national or international organizations which sponsor data collection through precise surveys and publish charts and descriptive material for navigational purposes. The science of oceanography is, in part, an outgrowth of classical hydrography. In many respects

825-495: The equivalent of contours on a topographic map since they are often drawn seaward of the actual shallowest depth portrayed. A bathymetric chart does show marine topology accurately. Details covering the above limitations can be found in Part ;1 of Bowditch's American Practical Navigator . Another concept that affects safe navigation is the sparsity of detailed depth data from high resolution sonar systems. In more remote areas,

858-849: The essentials of what today we would call a research ship are clearly apparent. In 1766, the Royal Society hired Cook to travel to the Pacific Ocean to observe and record the transit of Venus across the Sun . The Endeavour was a sturdy vessel, well designed and equipped for the ordeals she would face, and fitted out with facilities for her "research personnel", Joseph Banks . As is common with contemporary research vessels, Endeavour also carried out more than one kind of research, including comprehensive hydrographic survey work. Some other notable early research vessels were HMS Beagle , RV Calypso , HMS Challenger , USFC Albatross , and

891-494: The establishment of the United Kingdom Hydrographic Office , Royal Navy captains were responsible for the provision of their own charts. In practice this meant that ships often sailed with inadequate information for safe navigation, and that when new areas were surveyed, the data rarely reached all those who needed it. The Admiralty appointed Alexander Dalrymple as Hydrographer in 1795, with

924-402: The making of charts to aid navigation, by individual mariners as they navigated into new waters. These were usually the private property, even closely held secrets, of individuals who used them for commercial or military advantage. As transoceanic trade and exploration increased, hydrographic surveys started to be carried out as an exercise in their own right, and the commissioning of surveys

957-502: The only available depth information has been collected with lead lines. This collection method drops a weighted line to the bottom at intervals and records the depth, often from a rowboat or sail boat. There is no data between soundings or between sounding lines to guarantee that there is not a hazard such as a wreck or a coral head waiting there to ruin a sailor's day. Often, the navigation of the collecting boat does not match today's GPS navigational accuracies. The hydrographic chart will use

990-467: The public and to other nations as well. In 1829, Rear-Admiral Sir Francis Beaufort , as Hydrographer, developed the eponymous Scale , and introduced the first official tide tables in 1833 and the first " Notices to Mariners " in 1834. The Hydrographic Office underwent steady expansion throughout the 19th century; by 1855, the Chart Catalogue listed 1,981 charts giving a definitive coverage over

1023-640: The seabed and the underlying geology . Apart from producing the charts, this information is useful for detecting geological features likely to bear oil or gas . These vessels usually mount equipment on a towed structure , for example, air cannons used to generate shock waves that sound strata beneath the seabed , or mounted on the keel , for example, a depth sounder . In practice, hydrographic survey vessels are often equipped to perform multiple roles. Some function also as oceanographic research ships. Naval hydrographic survey vessels often do naval research, for example, on submarine detection. An example of

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1056-552: The seabed to find out what deposits lie beneath it. Hydrography Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans , seas , coastal areas , lakes and rivers , as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defense, scientific research, and environmental protection. The origins of hydrography lay in

1089-451: Was increasingly done by governments and special hydrographic offices. National organizations, particularly navies , realized that the collection, systematization and distribution of this knowledge gave it great organizational and military advantages. Thus were born dedicated national hydrographic organizations for the collection, organization, publication and distribution of hydrography incorporated into charts and sailing directions. Prior to

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