More than a dozen Steam Packet sailings have been rescheduled over the weekend and next week because of tidal conditions in Douglas.
Four Manxman sailings on Saturday have been rescheduled along with another four on Sunday.
The disruption continues into next week, with three crossings affected on Monday followed by another three on Tuesday.
Sailing times for a number of trips have also been extended, with the 4.15pm crossing on Tuesday now expected to take five hours.
The Manannan, now back in service on the Liverpool route, is unaffected.
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