A submarine is fully autonomous, meaning it is capable of renewing its power supply and breathable air. A submersible however is not self sustaining and needs to be connected to another vessel for support.
Submarines were sometimes referred to as submersibles.
Modern submarines are designed to go much faster submerged. This design also limits their surface speed capability. WW1 and WW2 submarines were not considered true submersibles by today's standards. They were essentially surface vessels that had the capability of limited submerged operations. As such, their design and propulsion made them faster on the surface and much slower underwater. Modern submarines are true submersibles in that their only limitation is that of their crews.
With submersibles, sonar, magnetometers, and satellites.
Narrowboats are one example.Nissan is a car maker.Nuclear submarines are military submersibles.
They come in different shapes and sizes
Submarines can be manned or robotic submersibles. In the undersea universe they can be used to explore the deepest points on Earth such as the Marianna Trenches. Within the Solar System the possibility of using robotic submarines may allow us to explore the Europa's under ice ocean.
The U.S. Navy's Alvin (DSV-2) is not a mini-submarine; it is a submersible.The technical difference between submarines and submersibles is that submersibles like Alvin require support vessels (surface or submarines) to transport them to their site of operations, launch / recover them, and replenish power, water, air, etc. after each use. They are also limited in space and air supply, which curtails their submerged operational time. These multiple factors are whey they are limited in their operational scope.Submarines are self-supporting units; while they may require support for repair and replenishment of crew needs (e.g., food), they do not require the type of support that submersibles do.
YES, most true submersibles have a 'pilot' and a systems operator. The submersibles that do not carry people are usually called ROV's or AUV's
Very small, if it even exists. Most submersibles do not carry cargo
Deep sea submersibles help get research from the ocean floor.
Submarines of WWI and WWII vintage were not true submersibles like today's modern submarines. They were surface ships that had limited submergence capability for attack and evasion. Many battles were actually fought on the surface with both torpedo attacks and deck guns.Modern submarines are true submersibles in every sense of the word, even modern Diesel Electric boats. Nuclear Power has become the preferred method of power generation, and such engineering means a boat's submerged operations is limited only by crew supplies (food, etc.). DE's can remain submerged for weeks today, where in the past they could only remain submerged for hours.
alvin