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Under-keel Clearance
In seafaring, under keel clearance (UKC) is the vertical distance between seabed and the keel or hull of a ship. It is used to ensure sufficient navigable water is available for ships at sea. Master mariners should ensure there is sufficient minimum UKC for their ships; ports should ensure sufficient minimum UKC for the type and draft of ships due to arrive in the port. Ships typically calculate their UKC to meet criteria for ports to minimise the risk of maritime incidents. The minimum UKC determined includes a safety margin. Methods of calculation At a basic level, it is typically calculated in metres using the formula: :UKC = Charted Depth − Draft -/+ Height of Tide Ship masters and deck officers can obtain the depth of water from Electronic navigational charts. More dynamic or advanced calculations include safety margins for manoeuvring effects and squat. Computer systems and software can be used to manage and calculate UKC for ships and ports. These include systems that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seamanship
Seamanship is the skill, art, competence (human resources), competence, and knowledge of operating a ship, boat or other craft on water. The'' Oxford Dictionary of English, Oxford Dictionary'' states that seamanship is "The skill, techniques, or practice of handling a ship or boat at sea." It involves topics and development of specialised skills, including navigation and international Admiralty law, maritime law and regulatory knowledge; weather, meteorology and forecasting; watchkeeping; ship-handling and small boat handling; operation of deck equipment, anchors and cables; ropework and line handling; communications; sailing; engines; execution of evolutions such as towing; cargo handling equipment, dangerous cargoes and cargo storage; dealing with emergencies; survival at sea and search and rescue; and fire fighting. The degree of knowledge needed within these areas is dependent upon the nature of the work and the type of vessel employed by a sailor, seafarer. History Shi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Hydrographic Organization
The International Hydrographic Organization (IHO) (French: ''Organisation Hydrographique Internationale'') is an intergovernmental organization representing hydrography. the IHO comprised 102 member states. A principal aim of the IHO is to ensure that the world's seas, oceans and navigable waters are properly surveyed and charted. It does this through the setting of international standards and through its capacity building programs and offices. The IHO enjoys observer status at the United Nations, where it is the recognized competent authority on hydrographic surveying and nautical charting. When referring to hydrography and nautical charting in conventions and similar instruments, it is the IHO standards and specifications that are normally used. History During the 19th century, many maritime nations established hydrographic offices to provide means for improving the navigation of naval and merchant vessels by providing nautical publications, nautical charts, and oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, air navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's Position (geometry), position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and Relative direction, direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nautical Terminology
Seamanship is the skill, art, competence (human resources), competence, and knowledge of operating a ship, boat or other craft on water. The'' Oxford Dictionary of English, Oxford Dictionary'' states that seamanship is "The skill, techniques, or practice of handling a ship or boat at sea." It involves topics and development of specialised skills, including navigation and international Admiralty law, maritime law and regulatory knowledge; weather, meteorology and forecasting; watchkeeping; ship-handling and small boat handling; operation of deck equipment, anchors and cables; ropework and line handling; communications; sailing; engines; execution of evolutions such as towing; cargo handling equipment, dangerous cargoes and cargo storage; dealing with emergencies; survival at sea and search and rescue; and fire fighting. The degree of knowledge needed within these areas is dependent upon the nature of the work and the type of vessel employed by a sailor, seafarer. History Shi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Canal
The Panama Canal () is an artificial waterway in Panama that connects the Caribbean Sea with the Pacific Ocean. It cuts across the narrowest point of the Isthmus of Panama, and is a Channel (geography), conduit for maritime trade between the Atlantic and Pacific Oceans. Lock (water navigation), Locks at each end lift ships up to Gatun Lake, an artificial fresh water lake Above mean sea level, above sea level, created by damming the Chagres River and Lake Alajuela to reduce the amount of excavation work required for the canal. Locks then lower the ships at the other end. An average of of fresh water is used in a single passing of a ship. The canal is threatened by low water levels during droughts. The Panama Canal shortcut greatly reduces the time for ships to travel between the Atlantic and Pacific oceans, enabling them to avoid the lengthy, hazardous route around the southernmost tip of South America via the Drake Passage, the Strait of Magellan or the Beagle Channel. Its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MS Stena Performer
MS ''Performance'' is a ro-ro freight ferry that entered service with Seatruck Ferries April in 2012. She currently operates for CLdN. The vessel was on charter to Stena Line for 6 years from Seatruck Ferries, during which she was named ''Stena Performer''. In September 2022, CLdN bought out Seatruck Ferries' shares from the Clipper Group and as a result the whole fleet was also bought. Seatruck Ferries became defunct in February 2024, with all vessels being incorporated into the CLdN fleet. She was renamed Performance in April 2025 to be fully incorporated into the CLdN branding. History She is one of four ships built by Flensburger Schiffbau-Gesellschaft, Germany. The vessel is the third newbuild to be completed. The vessel was launched in January 2012. The vessel was christened by Virginia O'Reilly, the wife of O'Reilly Transport Ltd (Ireland)'s managing director Eugene O'Reilly. The ship was completed and handed over on 16 April 2012. ''Seatruck Performance'' entered servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Accident Investigation Branch
The Marine Accident Investigation Branch (MAIB) is a UK government organisation, authorised to investigate all maritime accidents in UK waters and accidents involving UK registered ships worldwide. Investigations are limited to establishing cause, promoting awareness of risks and preventing recurrence. It may also participate in other maritime investigations where British citizens are involved or where the UK has a substantial interest. History The Marine Accident Investigation Branch (MAIB) was established in 1989 as a result of a recommendation of the public enquiry into the '' Herald of Free Enterprise'' disaster in 1987, when a ro-ro passenger ferry capsized off Zeebrugge, leading to the loss of 193 lives, many of them British citizens. Responsibilities The MAIB is an independent branch of the United Kingdom Department for Transport which can investigate any accident occurring in UK waters, regardless of the nationality of the vessel(s) involved, and accidents involving U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Grounding
Ship grounding or ship stranding is the impact of a ship on seabed or waterway side. It may be intentional, as in beaching (nautical), beaching to land crew or cargo, and careening, for maintenance or repair, or unintentional, as in a marine accident. In accidental cases, it is commonly referred to as "running aground". When unintentional, grounding may result simply in stranding, with or without damage to the submerged part of the ship's hull. Breach of the hull may lead to significant flooding, which in the absence of containment in watertight bulkheads may substantially compromise the ship's structural integrity, stability, and safety. As hazard Severe grounding applies extreme loads upon ship structures. In less severe accidents, it might result only in damage to the hull; however, in most serious accidents, it might lead to hull breaches, cargo spills, total loss of the vessel, and, in the worst cases, human casualties. Grounding accounts for about one-third of commercia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waves And Shallow Water
When waves travel into areas of shallow water, they begin to be affected by the ocean bottom. The free orbital motion In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an obj ... of the water is disrupted, and water particles in orbital motion no longer return to their original position. As the water becomes shallower, the swell becomes higher and steeper, ultimately assuming the familiar sharp-crested wave shape. After the wave breaks, it becomes a wave of translation and erosion of the ocean bottom intensifies. Cnoidal waves are exact periodic solutions to the Korteweg–de Vries equation in shallow water, that is, when the wavelength of the wave is much greater than the depth of the water. See also * * * * * * * * References External links Exploring the World OceanThe Oc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torres Strait
The Torres Strait (), also known as Zenadh Kes ( Kalaw Lagaw Ya#Phonology 2, [ˈzen̪ad̪ kes]), is a strait between Australia and the Melanesian island of New Guinea. It is wide at its narrowest extent. To the south is Cape York Peninsula, the northernmost extremity of the Australian mainland. To the north is the Western Province (Papua New Guinea), Western Province of Papua New Guinea. It is named after the Spanish navigator Luís Vaz de Torres, who sailed through the strait in 1606. History Pre-colonisation The islands of the Torres Strait have been inhabited by humans for at least 2,500 years and possibly much longer. The various Torres Strait Islanders, Torres Strait Islander communities have a unique culture and long-standing history with the islands and nearby coastlines. Their maritime-based trade and interactions with the Papuans to the north and the Australian Aborigines, Australian Aboriginal communities have maintained a steady cultural diffusion among the th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Maritime Safety Authority
Australian Maritime Safety Authority (AMSA) is an Australian statutory authority responsible for the regulation and safety oversight of Australia's shipping fleet and management of Australia's International Maritime Organization, international maritime obligations. The authority has jurisdiction over Australia's exclusive economic zone which covers an area of . AMSA maintains Australia's ship registration, shipping registries: the generalAMSARegister a vessel/ref> and the international shipping registers.AMSAAustralian international shipping register/ref> AMSA was established in 1990 under the ''Australian Maritime Safety Authority Act 1990'' and governed by the ''Commonwealth Authorities and Companies Act 1997''. As at 2024, AMSA is a statutory authority within the Department of Infrastructure, Transport, Regional Development, Communications and the Arts. Directors are appointed by the minister. The international treaties which AMSA administers include the ''Navigation Act 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Pilot
A maritime pilot, marine pilot, harbor pilot, port pilot, ship pilot, or simply pilot, is a mariner who has specific knowledge of an often dangerous or congested waterway, such as harbors or river mouths. Maritime pilots know local details such as depth, currents, and hazards. They board and temporarily join the crew to safely guide the ship's passage, so they must also have expertise in handling ships of all types and sizes. Obtaining the title "maritime pilot" requires being licensed or authorised by a recognised pilotage authority. History The word ''pilot'' is believed to have come from the Middle French, ''pilot'', ''pillot'', from Italian, ''pilota'', from Late Latin, ''pillottus''; ultimately from Ancient Greek πηδόν (pēdón, "blade of an oar, oar"). The work functions of the pilot can be traced back to Ancient Greece and Ancient Rome, Rome, when locally experienced harbour captains, mainly local fishermen, were employed by incoming ships' captains to bring t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
