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ANTARCTICA
7
CONTINENT >
7
ECHO SOUNDERS
GEOGRAPHIC REGION >
7
HEARD AND MCDONALD ISLANDS
MACQUARIE ISLAND
OCEAN >
POLAR
SHIPS
SOUTHERN OCEAN >
7
oceans
7
EARTH SCIENCE
6
BATHYMETRY
5
BATHYMETRY/SEAFLOOR TOPOGRAPHY
5
SEAFLOOR TOPOGRAPHY
5
SOUTHERN OCEAN
5
WATER DEPTH
5
AMD
4
AMD/AU
4
CEOS
4
R/V AA >
3
R/V Aurora Australis
3
Soundings
3
ACOUSTIC ATTENUATION/TRANSMISSION
2
ACOUSTIC FREQUENCY
2
ACOUSTIC REFLECTIVITY
2
ACOUSTIC SCATTERING
2
ACOUSTIC TOMOGRAPHY
2
ACOUSTIC VELOCITY
2
AIR TEMPERATURE
2
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