A number of Sunday's sailings are subject to possible disruption or cancellation.
The Ben-my-Chree and Manannan crossings are all at risk due to the forecast adverse weather.
The 2:15am and 8pm Manxman sailings are not thought to be affected.
A final decision on the Ben-my-Chree will be made by 7am on Sunday, and the Manannan by 11:30am.
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