Information's coming out on the Interislander's emergency distress call in the Cook Strait on Saturday.

The Kaitaki made a mayday call after losing power.

All 800 passengers donned life jackets, and ambulances waited on the shore - just in case.

The Transport Accident Investigation Commission is investigating.

Interislander General Manager Walter Rushbrooke shared more details with Nick Mills on Wellington Mornings. 

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