With Russia laying stake to the North Pole and running an armada of 40 ships capable of plowing through the frigid Arctic waters year-round, the White House said its ailing fleet of three icebreakers would be updated and expanded.
The announcement coincides with President Barack Obama's visit to Alaska, around a third of which is north of the Arctic Circle.
The United States will bring forward the replacement of a new heavy icebreaker to take over from the ramshackle "Polar Sea" by two years to 2020, and plan to build more.
The rapid melting of polar ice has sent activity in the inhospitable region into overdrive -- as nations eye newly viable oil, gas deposits, mineral deposits and shipping routes like the Northwest Passage.
But there is a complex web of territorial claims with Canada, Denmark, Finland, Iceland, Norway, Russia, Sweden and the United States all claiming a stake in portions of the Arctic.
Non-polar nations like China, which also has its own icebreaker, have also been exploring the viability of trans-Arctic shipping routes.
"Meeting these challenges requires the United States to develop and maintain capacity for year-round access to greater expanses within polar regions."
Members of the Senate Arctic Caucus, Angus King of Maine and Lisa Murkowski of Alaska, described the move as a modest step in the right direction, stressing it would have to be backed by resources.
"What the president did today was less a plan than an acknowledgement that these needs must be addressed, falling short of any hard commitments made," Murkowski's office said in a statement.
