The Steam Packet Company says it's activated emergency plans after its newest ferry suffered damage in an incident overnight.
The Marine Accident Investigation Branch is investigating after the Manxman was damaged at Heysham.
In a statement, the Steam Packet says the Ben-my-Chree and Arrow will maintain passenger and freight services.
The Manxman will need repairs before she can re-enter service, and in the meantime the Manannan will continue as normal.
MHK to quiz minister over bus facilities
Harbour 2 Harbour entries now open
Castle Rushen designs 'ongoing', says minister
Two sailings cancelled, a further two at risk
Will the airport get a facelift soon?
Clocks go forward tonight!
Possible oil price hikes prompt Keys question
Government considers tourism tax to boost hospitality