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The US Navy has started to deploy underwater drones beneath the arctic ice both to study the deterioration of the ice sheet due to climate change and to help plan for anticipated increases in traffic as previously frozen waterways open up.
In terms of environmental monitoring, the drones will measure salinity and temperature, for instance, which will help scientists create more accurate models to predict future rates of melting.

But the plans are also meant to address the “security implications” of the opening up of the Arctic waters, according to the Navy’s Arctic Roadmap, updated in 2014 to adapt to changing Arctic conditions. Part of that plan, which spans 2014-2030, is to increase the number of ships in the region, Martin Jeffries, science advisor to the Office of Naval Research, or ONR, told Military​.com.

http://sputniknews.com/military/20150…