Water depth in the Rove tunnel is 4m, and 12m in the Stad tunnel. They don't say at what state of the tide that is though, which I would have thought affects th

Water depth in the Rove tunnel is 4m, and 12m in the Stad tunnel. They don't say at what state of the tide that is though, which I would have thought affects the size of ship that can pass through significantly (unless it has locks either end I suppose). From Wikipedia: Rove: Length - 7,120 metres (23,360 ft) long Clearance - 15 m (49 ft) Width - 22 m (72 ft) Stad: Length - 1800 metres Clearance - 49 metres Width - 37 metres Boat-passable - 16 metres Depth of tunnel below water level - 12 metres