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14 Cards in this Set
- Front
- Back
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SONAR |
- Stands for Sound Navigation And Ranging
- A device sends a sound wave into the ocean, then the sound wave bounces off the ocean floor, creating an echo. |
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RADAR |
- Stands for Radio Detection and Ranging, using waves to help people explore
- A RADAR picks up any echoes that are bounced off an object
- Uses the echoes to tell the distance, speed, direction of motion, and shape of the object.
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Satellite |
- An object in space that only revolves around Earth, or any other planet.
- Most important system is the GPS
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Echo/Echolocation |
- An echo is a sound the repeats, and slowly fades away
- finding the location of objects by reflected sound, in particular used by animals such as dolphins and bats. |
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GPS |
- Stands for Global Positioning System
- It has 24 Orbiting Satellites, is a great navigation system for environments like oceans and deserts.
- Used in cars, boats, helicopters, ships, submarines, and hand held receivers for explorers/hikers |
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ROVs |
- Stands for Remote Operated Vehicle
- Is a submersible that does not carry passengers
- Is operated with a joystick by an oceanographer on board a large research vessel |
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SCUBA |
- Stands for Self-Contained Underwater Breathing Apparatus
- Allows divers to carry their air supply on their backs
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Aqua Lung |
- Jacques Cousteay and Èmme Gagnon invented the Aqua Lung
- Pushes air to a mouth piece, can go down safely to 75 metres.
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Ballast Tank |
- Tanks fulled with water or air
- When the tank is filled with water, the submarine sinks, when the tank is filled with compressed air, the submarine floats to the surface.
- Ballast tanks controls a submarine's buoyancy |
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Buoyancy |
- The ability to float
- A Buoyancy Compensator is a vest that can golf air, to sink, the diver releases air from the vest, to rise up againn, the diver blows air from the compressed air tank into the vest. |
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Submersibles |
- Made out of titanium, a very strong metal
- Submersible are like submarines and ROVs, they are pressurized vehicles, that have normal air pressure inside. |
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Water Pressure |
- Increases as you go deeper underwater
- At just below 10m, the pressure of the water is twice, the atmosphere pressure, at the surface |
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Surviving extreme conditions (darkness, heat, water pressure) |
- Underwater vehicles must have very strong bodies or 'hulls'
-The vehicles contain lights, for darkness, fans for heat, and are pressurized |
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Canada's Contributions |
- Newt Suit: built to withstand the pressure of deep water, developed by Phil Nuytten. Can work at 305m below surface for 8 hours
- Deep Worker: a Canadian designed on-person submersible to explore the underwater world, also know as the under water 'sports car.' Explorers can spend more time underwater than using traditional scuba gear
- Neptune Project: working with the Americans, to give a new understanding of the activity in the Pacific Ocean, knowledge can be applied for many global issues like: predicting earthquakes, tracking marine life, understanding climate change, and finding new energy sources. |
