Several inquiries are underway after a suspected steering problem saw the Interisland ferry Aratere run aground near Picton.
On Friday night, the ship became grounded.
It was re-floated successfully last night on the high tide.
Maritime Union spokesperson Victor Billot believes it could be a while before the ship is back sailing.
"They're going to have to look at the steering system, obviously, they're going to have to look the hull...it's going to be a long time."
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