Some Covid-positive mariners broke MIQ rules during their stay in Wellington

There were two instances of bubble breaches by Viking Bay mariners the day the crew members entered the Grand Mercure hotel on July 13.

They included one mariner entering another's room, and another knocking on the door of a room and passing an item through.

An MIQ spokesperson says both breaches were detected by CCTV and the mariners were spoken to by interpreters.

They say language can be a barrier in managed isolation, and there can be a few teething problems in the first few days of a stay.

Fifteen of the Viking Bay's 20 crew are back on board the vessel, which remains in quarantine at Wellington's Queens Wharf - with the last five crew still in MIQ.