One of the ramps at Elizabeth Harbour is broken and can't be fixed until next week at the earliest.
The ramps get vehicles and roll-on roll-off freight off arriving vessels.
The break-down means only one ship can dock at a time, using the only remaining working ramp.
The company which initially built and installed the ramps is sending a team of engineers to the island to make the necessary repairs next week (6 March)
Ports of Jersey say 'minimal disruption' is expected to passenger services.
It's not clear how long the broken ramp will be out of service.

Search for speeding cars out west
More than 2,250 runners taking on Jersey Marathon
Man charged with murder of Hannah Benfield in Alderney
Huge corporate tax windfall will help pay for Overdale Hospital
Hate crime legislation: Liberate CEO 'very encouraged' by Minister's plan
An appeal for apples!
Chris Kamara launches men's mental health initiative in Guernsey
Channel Islands Christmas Lottery tickets on sale