The Canadian Coast Guard says it is closely monitoring problems affecting components on all three of its new offshore fisheries science vessels.
Two different components — a propulsion shaft tube and valves controlling seawater intake — have needed repair or replacement on coast guard ships John Franklin, Jacques Cartier and John Cabot.
The "class-wide" problems included corrosion, premature wear or mislabelling.
The ships have a one-year warranty after delivery.
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