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.
Avoid Fairy Bridge after crash, say police
Man can sue DHSC over respite care PTSD allegations
More EV chargers at Sea Terminal?
Company warns over fake delivery emails
Should dangerous drivers who kill face life in jail?
Police dealing with crash in Colby
Stop falsely accusing youngsters of vandalising skate park!
Plans to make northern school more accessible