This in from Wightlink in their own words. Ed
Wightlink regretfully announce the temporary withdrawal from service of one of our car ferries, due to an ongoing mechanical failure.
This unfortunately means we are unable at present to offer a half hourly schedule.
Customers with bookings at half past the even hours from Gunwharf and half past the odd hours ex Fishbourne, are advised to contact our Reservations Office on 02392 827761, for further information.
Wightlink apologise to all of our customers for any inconvenience caused and thank you all for your understanding.
Image: Secret Pilgrim under CC BY-SA 2.0