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Astern propulsion (as applied to a ship) is a maneuver in which a ship's propelling mechanism is used to develop thrust in a retrograde direction. Astern propulsion does not necessarily imply the ship is moving astern ( in reverse ); astern propulsion is used to slow a ship by applying a force in the direction of the bow of the ship, instead of ...
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an ...
Propulsion thrusters are those thrusters which provide longitudinal motion for vessels as an alternative to traditional propellers. There are a variety of types of propulsion thrusters but the most common form is the azimuth thruster, that can rotate 360 degrees on a vertical axis to optionally produce thrust for maneuvering. (Lindborg, 1997).
Pages in category "Marine propulsion" The following 90 pages are in this category, out of 90 total. ... Astern propulsion; Azimuth thruster; Azipod; B. Bank effect;
A guardian valve is a valve used in marine steam turbine propulsion plants to prevent steam from leaking into the astern turbine while the vessel is operating in the ahead mode. It is normally installed between the astern throttle valve and the astern elements of the low pressure (LP) turbine. Typically only the LP turbine of a steam ship's ...
"I am operating astern propulsion." [b] Speed (velocity) in knots T Tango [ˈtaŋ.goʊ] "Keep clear of me [b]; I am engaged in pair trawling." Local time. (The first 2 digits denote hours; the last 2 denote minutes.) U Uniform [ˈjuː.nɪ.fɔːm] "You are running into danger." V Victor [ˈvɪk.tə] "I require assistance." Speed in kilometres ...
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The superiority of electric podded propulsion in icebreaking ships, especially when running astern, was proved when the first propulsion pod was installed on fairway maintenance vessel Seili, owned by the Finnish Maritime Administration, in 1990. Before the conversion the ship could not break ice astern at all, but after the propeller and ...