Mannanan will be taken out of service next Tuesday for repairs to be made following damage caused during TT week.
The fast craft is operating on reduced power after ingesting discarded fishing gear which damaged a shaft bearing one of the four engines.
She'll only be out of action for a day - but on Wednesday the Ben-my-Chree will then go into dry dock to have work done to fix a stabilising fin, damaged during the heavy weather earlier in the year.
Both vessels will be back operating by the end of next week in time for the busy summer season.
Steam Packet brings out the Ben-my-Chree as a contingency
Post affected by Manxman cancellations
MGP rider says 'I'll be back' following crash on Sunday
Manxman wins extreme triathlon in Norway
New café tenants have moved in to The Roundhouse
Authorities urge cyclists to get off their bikes through pedestrian zones
Booklet launched to protect the Island's sea-life
Emergency response activated as smoke detected onboard the Manxman
