At least two investigations are underway following the Connemara ship's power failure in Cook Strait overnight.
The ferry lost power at about half past ten, not long after leaving Wellington harbour.
CentrePort's tugs - the Tapuhi and then the Tiaki - were able to tow it back to the Pipitea wharf early this morning, with 88 people on board.
The Wellington Harbourmaster, Grant Nalder, told Morning Report it was fortunate mild weather conditions meant there was no risk of it drifting into land.
But he says it is worrying yet another ferry has broken down during its sailing, and as the ferries get older, the concern will continue to rise.
Mr Nalder says there is not very good support for ferries out in Cook Strait, though improvements have been made to tugs and the sailing route since the Kaitaki lost power in 2023.
Kathryn talks first to the Maritime Union's national secretary Carl Findlay.
Bluebridge Connemara ferry back in Wellington after drifting in Cook Strait for hours. Photo: RNZ / Ben Strang
