The Kaiarahi’s arrival was delayed for about three hours while the issue on the Kaitaki was assessed, the spokesman said.
“We appreciate the inconvenience this delay caused passengers on Kaiarahi and thank them for their patience,” an Interislander spokesman said.
“We also apologise for the disruption to our freight customers.”
The spokesman said the issue with Kaitaki’s navigation system is being resolved and the company expects it will resume sailing as soon as possible today.
Both Interislander and rival operator Bluebridge have been hit with breakdowns and engine problems in recent weeks, disrupting the travel plans of thousands of passengers.
Consumer NZ has filed a complaint with the Commerce Commission as it believes the operators are failing to meet their obligations under the Consumer Guarantees Act.
Interislander says the delays are due to a compounding set of factors and its focus was on meeting its obligations under NZ legislation and its own terms and conditions.
Bluebridge has been approached for comment.