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2. 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.

3. Wärtsilä - Wikipedia

   en.wikipedia.org/wiki/Wärtsilä

   The core products of Wärtsilä include technologies for the energy sector, including gas, multi-fuel, liquid fuel and biofuel power plants and energy storage systems; [2] and technologies for the marine sector, including cruise ships, ferries, fishing vessels, merchant ships, navy ships, special vessels, tugs, yachts and offshore vessels.

4. Schottel (company) - Wikipedia

   en.wikipedia.org/wiki/Schottel_(company)

   Schottel is a manufacturer of propulsion and steering systems for ships and offshore applications. The company founder Josef Becker invented the rudderpropeller, a z-drive, in 1950.

5. Toroidal propeller - Wikipedia

   en.wikipedia.org/wiki/Toroidal_propeller

   A simple 3 blade toroidal propeller. A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers.

6. CPP - Wikipedia

   en.wikipedia.org/wiki/CPP

   C++ (file extension: .cpp), a programming language; Carte parallelogrammatique projection, an equirectangular map projection; Chinese postman problem, a mathematical problem in graph theory; meta-Chlorophenylpiperazine, a chemical; Controllable-pitch propeller, is a type of propeller used in Marine propulsion.

7. List of abbreviations in oil and gas exploration and production

   en.wikipedia.org/wiki/List_of_abbreviations_in...

   MOF – marine offloading facility; MOPO – matrix of permitted operations; MOPU – mobile offshore production unit (to describe jack-up production rig, or semi-submersible production rig, or floating production, or storage ship) MOT – materials/marine offloading terminal; MOV – motor operated valve; MPA – micropalaeo analysis report