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They are used for scientific research as well as warfare. Smaller submarines were used for scientific research (underwater animals, plants, etc.)
Most submarines have propellers that spin, pushing them forward. A few smaller research submarines use a water jet for propulsion.
Civilian-Under water research. Military-Stealth
Submarines that do science.Most scientific submarines conduct oceanographic research. The Ben Franklin drifted in the Gulf Stream conducting research on currents. The Alvin and the US Navy's NR-1 conduct wreck dives and deep-sea research.The ocean is the last frontier on Earth that has not been fully explored, submarines are slowly helping to roll back the veil of the unknown.
The term submarine combines the term "marine" and the prefix "sub" to form the word. Marine is a term that applies to the ocean or the sea, and the prefix sub means beneath or below. The submarine operates beneath the sea.
they can be in different sizes such as being long or short or huge and small
Some common features of submarines is an adaptation to allow humans to survive and carry out our missions of research, pleasure or combat. I hope that I help you.. haha :)
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As far as civilian submarines, technically no, as tourist submarines aren't actually transporting from point A to point B. For military submarines, absolutely. People using submarines as transport vessels are Special Forces (e.g., SEAL's), Navy research scientists (Polar Expeditions), and other individuals designated as required.
they are called "grants" cw: In the old days, SBIR -- Small Business Innovative Research -- was one term used by smaller businesses in the federal system.
case study
The submarines in WW2 are different from now. I have done research and back then submarines were easily sunk and were ran differently ! How were they ran differently ? Back then in WW2 the submarines used, were smaller ... They were ran by Diesel engines which allowed them to high surface speed and long range, but underwater it was very difficult and the speed and range wasn't the same from out of the water.