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It is an art because of the skill that the navigator must have to avoid the dangers of navigation, and it is a science because it is based on physical, mathematical, oceanographic, cartographic, astronomical, and other knowledge. Marine navigation can be surface or submarine.
In the European medieval period, navigation was considered part of the set of seven mechanical arts, none of which were used for long voyages across open ocean. Polynesian navigation is probably the earliest form of open-ocean navigation; it was based on memory and observation recorded on scientific instruments like the Marshall Islands Stick Charts of Ocean Swells.
The Bangladesh Navy (Bengali: বাংলাদেশ নৌবাহিনী) is the naval warfare branch of the Bangladesh Armed Forces, responsible for the defence of Bangladesh's 118,813 square kilometres (45,874 sq mi) of maritime territorial area from any external threat, the security of sea ports and exclusive economic zones of Bangladesh. [5]
In his notes on Ptolemy's geography, Johannes Werner of Nuremberg wrote in 1514 that the cross-staff was a very ancient instrument, but was only beginning to be used on ships. [ 36 ] Prior to 1577, no method of judging the ship's speed was mentioned that was more advanced than observing the size of the vessel's bow wave or the passage of sea ...
On 12 April 2018, the police said that Rakesh Kumar, who leaked the class 12 economics paper, had leaked class 10 mathematics paper also. [40] Consequently, the Central Board of Secondary Education has put in place a system of "encrypted" question papers, which are supposed to be printed by the schools half an hour before the exam starts. [41]
Maritime history dates back thousands of years. In ancient maritime history, [1] evidence of maritime trade between civilizations dates back at least two millennia. [2] The first prehistoric boats are presumed to have been dugout canoes which were developed independently by various Stone Age populations.
The approved major overhaul of the current curriculum is about to be implemented nationwide for classes 1–12 starting from classes 6 and 7 in 2023, [27] classes 8 and 9 in 2024, class 10 in 2025, class 11 in 2026, and class 12 in 2027.
Ships are typically larger than boats, but there is no universally accepted distinction between the two. Ships generally can remain at sea for longer periods of time than boats. [3] A legal definition of ship from Indian case law is a vessel that carries goods by sea. [4] A common notion is that a ship can carry a boat, but not vice versa. [5]