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Question

whats a device scientist use to map the ocean floor

Answer 1

G'day Princess,

Thank you for your question.

Scientists have used several submersibles such as bathyspheres and Marine Roving Operating Vehicles to map the sea floor.

The bathyshpere is a type of tethered submersible which lacks any self-propulsion. A predecessor of the bathysphere, the diving bell, consists of a chamber with an open bottom simply lowered into the water.

The bathyscaphe is the predecessor to deep submergence vehicles. It has less mobility than deep submergence vehicles, but is untethered, and will use something like a bathysphere for a crew compartment. Because of the extreme depth of operations of a bathyscaphe, its buoyancy is provided by tanks filled with aviation fuel or another light, incompressible fluid. Return to surface is facilitated by jettisoning lead shot or clump weights

Small unmanned submersibles called "marine remotely operated vehicles" or MROVs are widely used today to work in water too deep or too dangerous for divers.

Remotely operated vehicles (ROVs) repair offshore petroleum platforms and attach cables to sunken ships to hoist them. Such remotely operated vehicles are attached by a tether (a thick cable providing power and communications) to control center on a ship. Operators on the ship see video images sent back from the robot and may control its propellers and manipulator arm. The wreck of the Titanic was explored by such a vehicle, as well as by a manned vessel.

Among the most famous submersibles is the deep-submergence research vessel DSV Alvin. Alvin (DSV-2) is a 16-ton, manned deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, Massachusetts. The craft was built by General Mills' Electronics Group in the same factory used to manufacture breakfast cereal-producing machinery in Minneapolis, Minnesota. It's designer originally named it Sea Pup, but when this was deemed undignified they decided to name if after (various stories have it): Alvin the chipmunk, its proponent Allyn Vine, or because the name Alvin meant "Faithful Friend." Alvin was commissioned on June 5, 1964.

The submersible is launched from the deep submergence support vessel Atlantis, which is also owned by the U.S. Navy and operated by WHOI. The submersible has taken 12,000 people on over 4,000 dives to observe the lifeforms that must cope with super-pressures and move about in total darkness. It is said that research conducted by Alvin has been featured in nearly 2,000 scientific papers.

Alvin was designed as a replacement for bathyscaphes and other less maneuverable oceanographic vehicles. Its more nimble design was made possible in part by the development of syntactic foam, which is buoyant and yet strong enough to serve as a structural material at great depths. The three-person vessel allows for two scientists and one pilot to dive for up to nine hours at 4500 meters (15,000 feet). The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The hatch of the vessel is 0.6 meters (two feet) thick, and held in place by the pressure of the water above it (it is tapered, narrower inward).

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Answer 2

Secchi Disk

Answer 3

sonar

Answer 4

wit a mop.



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