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ALTITUDE
2
Aircraft
2
Comment
2
DATE/TIME
2
Hydrurga leptonyx
2
Identification
2
LATITUDE
2
LONGITUDE
2
Length
2
Leptonychotes weddellii
2
Lobodon carcinophaga
2
Marine Mammal Tracking MMT
Ommatophoca rossii
2
Seals, unidentified
Side
2
Brash ice coverage
1
Cake ice coverage
1
Census strip-width
1
Contrast
1
Date/time end
1
Distance
1
Gear
1
Glare
1
Ice coverage
1
Ice floe coverage
1
Latitude 2
1
Longitude 2
1
Speed
1
Temperature, air
1
Time of day
1
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