The Steam Packet company says four sailings tomorrow have been rescheduled and two called off in the face of bad weather.
The Manannan's 7.15am sailing to Liverpool and 11.15am return will both leave an hour earlier.
Meanwhile the Manxman's 8.30am Heysham run will leave half an hour late - with her 2.15pm return voyage now scheduled for 1.45am on Sunday.
And the Manannan's 3pm trip to Liverpool and 8pm return have both been called off.
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