• Swedish Navy submarine HMS Gotland off San Diego during trials with the US Navy. The submarine is one of three to undergo a mid-life ugrade upgrade similar to that projected for Australia's Collins class boats. Photo: US Navy
    Swedish Navy submarine HMS Gotland off San Diego during trials with the US Navy. The submarine is one of three to undergo a mid-life ugrade upgrade similar to that projected for Australia's Collins class boats. Photo: US Navy
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