O 2-class submarine
The O 2-class submarine consisted of four submarines built by Koninklijke Maatschappij De Schelde in Flushing for the Royal Netherlands Navy. Used for patrols in the Dutch home waters. The class comprised O 2, O 3, O 4 and O 5. Its diving depth was ; during trials with no crew on board a depth of  was reached. Construction

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External links
Description of class