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ARCTIC OCEAN
NORTHWEST PASSAGE
*ARCTIC REGIONS
6
NORTHERN SEA ROUTE
5
Geography
4
Government and Political Science
4
Ice and Permafrost
4
Snow
4
CLIMATE CHANGE
3
Meteorology
3
NATURAL RESOURCES
3
SEA ICE
3
*CLIMATE CHANGE
2
*COAST GUARD
2
*INTERNATIONAL LAW
2
*UNITED STATES GOVERNMENT
2
CANADA
2
COMMERCE
2
DATA ACQUISITION
2
ECONOMIC DEVELOPMENT
2
GREENHOUSE EFFECT
2
MARITIME DOMAIN AWARENESS
2
MARITIME OPERATIONS
2
MILITARY FORCES(UNITED STATES)
2
MILITARY PLANNING
2
Military Forces and Organizations
2
Military Operations
2
NATIONAL SECURITY
2
NAVAL OPERATIONS
2
POLICIES
2
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