A suspected chimney stack lagging fire was detected on the Ben-my-Chree this morning.
It's estimated to have started at around 8:45am on the crossing from Douglas to Heysham.
Steam Packet engineers have since contained the blaze, completed their investigations and gave the vessel the go-ahead to continue on with her journey.
No passengers or crew have been injured and there's no significant damage.
The ship is now travelling to Belfast as scheduled.
Fuel price hit may last into winter, says government
Further temporary speed limits on TT course
Western homes to be without water tomorrow
Co-Op ordered to hand over evidence in blind worker's tribunal
Who'll be getting meningitis vaccines?
New atlas shows dramatic fall in Island birth rate
Autocar lavishes praise on Island's roads
Super Unleaded hits almost 165p a litre