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2. Ship measurements - Wikipedia

   en.wikipedia.org/wiki/Ship_measurements

   Shaft Horsepower (SHP) – The amount of mechanical power delivered by the engine to a propeller shaft. One horsepower is equivalent to 746 watts. Tonnage – A number derived from any of several methods to calculate the volume or other number indicative of a ship's cargo carrying capacity.

3. Variable-pitch propeller (marine) - Wikipedia

   en.wikipedia.org/wiki/Variable-pitch_propeller...

   In marine propulsion, a variable-pitch propeller is a type of propeller with blades that can be rotated around their long axis to change the blade pitch. Reversible propellers—those where the pitch can be set to negative values—can also create reverse thrust for braking or going backwards without the need to change the direction of shaft revolution.

4. Azimuth thruster - Wikipedia

   en.wikipedia.org/wiki/Azimuth_thruster

   English inventor Francis Ronalds described what he called a propelling rudder in 1859 that combined the propulsion and steering mechanisms of a boat in a single apparatus. . The propeller was placed in a frame having an outer profile similar to a rudder and attached to a vertical shaft that allowed the device to rotate in plane while spin was transmitted to the propell

5. Ultim (trimaran sailboat class) - Wikipedia

   en.wikipedia.org/wiki/Ultim_(trimaran_sailboat...

   On the occasion of the Route du Rhum 2010, the organization of the race decided to group together in a new category all the multihulls of 60 feet and more, with no maximum limit of size. The aim was to succeed the ORMA class of the 60-foot trimarans, to wait for the construction of the MOD 70 for the year 2011 and to open the race for large ...

6. Propeller - Wikipedia

   en.wikipedia.org/wiki/Propeller

   An advanced type of propeller used on the American Los Angeles-class submarine as well as the German Type 212 submarine is called a skewback propeller. As in the scimitar blades used on some aircraft, the blade tips of a skewback propeller are swept back against the direction of rotation. In addition, the blades are tilted rearward along the ...

7. Ducted propeller - Wikipedia

   en.wikipedia.org/wiki/Ducted_propeller

   A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter. It was developed first by Luigi Stipa (1931) and later by Ludwig Kort (1934). The Kort nozzle is ...