Tidal conditions in the UK means changes to the Manxman's sailings over the next two days.
The Steam Packet company says her Douglas to Heysham sailing will set out at 8am on Thursday rather than 8.45am.
Her return trip from Lancashire will set off at 1.15pm, an hour earlier than scheduled, while her evening sailing from Douglas will leave at 7.15pm instead of 7.45.
On Friday, the vessel is due to leave Heysham at 2.15am but will now set sail at 1.50am.
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