Only one submarine left to defend Australia

Submarine woes have hit a new low with just one of six Collins Class craft fit for service.

Experts differ on the security risk this poses for the nation, but they agree that having just one boat available to defend the nation is a terrible return on a $10 billion taxpayer investment.

With HMAS Waller tied up at the Henderson shipyard south of Perth for urgent battery repairs, the only seaworthy sub is HMAS Farncomb.

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