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2. Heckler & Koch P11 - Wikipedia

   en.wikipedia.org/wiki/Heckler_&_Koch_P11

   Since ordinary-shaped rounds are inaccurate and have a very short range when used underwater, this pistol fires steel darts underwater or traditional bullets above water. [ 2 ] [ 1 ] It has five barrels, each of which is loaded with a cartridge , giving the gun a pepper-box appearance, and it is electrically ignited from a battery pack in the ...

3. Underwater thruster - Wikipedia

   en.wikipedia.org/wiki/Underwater_thruster

   BlueROV2 with electric thrusters. Electric thrusters are mainly used on battery operated underwater robots such as AUVs, submarines, and electric ROVs. Electric thrusters usually use brushless DC or permanent magnet synchronous motors (PMSM). These motors may be sealed within air- or oil-filled cavities, or use a flooded design that allows ...

4. Rinspeed sQuba - Wikipedia

   en.wikipedia.org/wiki/Rinspeed_SQuba

   The sQuba is a zero-emission, [4] all electric vehicle which uses three electric motors, one for land travel, two for water. It drives on land powered by its electric rear-wheel drive powertrain, using rechargeable lithium-ion batteries. Upon entering water, it floats on the surface until the operator floods the interior to submerge it.

5. Electro-hydraulic actuator - Wikipedia

   en.wikipedia.org/wiki/Electro-hydraulic_actuator

   Electro-hydraulic actuators (EHAs), replace hydraulic systems with self-contained actuators operated solely by electrical power. EHAs eliminate the need for separate hydraulic pumps and tubing, because they include their own pump, [1] simplifying system architectures and improving safety and reliability. This technology originally was developed ...

6. Submarine power cable - Wikipedia

   en.wikipedia.org/wiki/Submarine_power_cable

   A submarine power cable is a transmission cable for carrying electric power below the surface of the water. [1] These are called "submarine" because they usually carry electric power beneath salt water (arms of the ocean, seas, straits, etc.) but it is also possible to use submarine power cables beneath fresh water (large lakes and rivers).

7. Greater Underwater Propulsion Power Program - Wikipedia

   en.wikipedia.org/wiki/Greater_Underwater...

   The batteries were of a new design. Compared with the original Sargo battery, the Guppy battery used a greater number of thinner plates that would generate higher current for a longer time. However, these batteries had a shorter life, 18 months versus the five years of the Sargo battery, and took longer to charge. They also required ventilation ...