The Manxman's had to return to Douglas because of a medical emergency on board.
A spokesperson for the Steam Packet said it was quicker for the ferry to turn around and come back to port in this situation.
The Manxman left Douglas at 7.55am this morning, Tuesday, December 16, bound for Heysham.
The company said an update on the incident would follow.
Weather warning for storm Dave this weekend
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Roads to close for music festival this weekend
Roads in Ramsey will be closed for a day this weekend for a Manx music and dance festival.
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How long do patients generally spend in the mental health ward during a crisis?
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Framework of new Sea Services Agreement ready, says minister
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Attorney General says he's stepping down
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Road closures in two towns for running event this week
Roads in two towns will close for a running event this week.
Six weekend ferry crossings could face disruption
A series of sailings this weekend could be at risk of cancellation.
