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Bollard pull is a conventional measure of the pulling (or towing) power of a watercraft.It is defined as the force (usually in tonnes-force or kilonewtons (kN)) exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test (but sometimes simulated) under test conditions that include calm water, no tide, level trim, and sufficient ...
Deadweight tonnage is a measure of a vessel's weight carrying capacity, not including the empty weight of the ship. It is distinct from the displacement (weight of water displaced), which includes the ship's own weight, or the volumetric measures of gross tonnage or net tonnage (and the legacy measures gross register tonnage and net register tonnage).
A pusher, pusher craft, [1] pusher boat, pusher tug, or towboat, is a boat designed for pushing barges or car floats. In the United States, the industries that use these vessels refer to them as towboats. These vessels are characterized by a square bow and a shallow draft, and they typically have knees, which are large plates mounted to the bow ...
3. Vessel towing Diamond Tow > 200 m 3. Vessel being towed Diamond Tow > 200 m 4,11. Fishing (with restricted maneuvrability) 2 cones (apexes together) > 20 m (extra cone: gear extending more than 150 metres in that direction) 5. Not under command 2 balls (vert. line) > 12 m 6. Minesweeping 3 balls 7,10. Restricted in ability to manoeuvre
Justine McAllister, a tug boat in New York Harbor, January 2008 The tugboats Reid McAllister and McAllister Responder push the LPG tanker BW Volans into port at Marcus Hook on the Delaware River. A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line.
Catalina 22 A Catalina 22 with a wing keel, on its road trailer.. The Catalina 22 is a recreational keelboat, built predominantly of fiberglass, with teak wood trim. It has a masthead sloop rig, a raked stem, a vertical transom, a large self-bailing cockpit, with under-seat lockers, a transom-hung rudder controlled by a tiller and a fixed fin keel.
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In comparison, the next-largest 47' MLB has a towing capacity of 150 long tons (150 t). [6] To increase their endurance and capabilities, the 52' MLB is equipped with a complete galley and a fire/salvage pump with 250 US gal/min (16 L/s) capacity. [4] In the 21st century, the Korean-war era vessels had to use custom built parts to stay operational.