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ABE (automated benthic explorer)

an untethered submersible, equipped with cameras and sensors, that navigates by sound beacons for long periods of time

decompresion chamber

a large portable container that divers can enter after they've surfaced to help their bodies return to normal atmospheric pressure

echo sounder

a device used to determine depth by sound waves

fathom

a unit of measure for ocean depth. One fathom is 6 feet

Oceanography

study and exploration of the world's oceans

ROV (remotely operated vehicle)

unmanned submersible tethered to a mother ship and operated by pilots using a joy stick

scuba (self-contained underwater breathing apparatus)

device that allows divers to breathe underwater for long periods of time

sonar (sound navigation ranging)

a device that determines the distance of an object under water by recording echoes of sound waves

submersible

a small submarine used to explore the ocean depths; equipped with scientific equipment capable of seeing and recording data

abiotic factor

the non-living factors of the environment that an organism lives in

aphotic zone

lowest layer of the ocean where light does not reach

biotic factor

the living organisms of the environment

bioluminescence

production of light through chemical processes

chemosynthesis

production of organic material from chemical reactions

fauna

animals

flora

plants

photic zone

top layer of the ocean where sunlight penetrates

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