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Australia signs $1.4-B deal to upgrade navy submarines

SYDNEY — Australia said on Saturday it had signed a A$2.2 billion ($1.4 billion) four-year contract with state-owned submarine builder ASC to upgrade the navy's Collins class submarines.

The 'sustainment contract' is part of a government pledge to keep the diesel-electric powered Collins-class fleet 'a potent strike and deterrence capability', Defense Industry Minister Pat Conroy said in a statement.