The Island's passenger watchdog TravelWatch has urged the Steam Packet to keep travellers informed about delays caused by the engine problems afflicting its fast craft.
Both the Snaefell and Manannan are running one-engine-down, as a result of crankshaft failure.
Services are being maintained, although crossing times between Douglas and Liverpool are around 30 minutes longer.
Travel Watch chairman Brendan O'Friel says it's very bad luck for the company at the start of the school holiday period.
Mr O'Friel says giving passengers up-to-date information must be a key priority:
Edge: People need to have confidence in elections
Royal assent for legislation tackling period poverty
Youth programmes clear focus for St John Ambulance's new Dame Commander
Next phase of conservation work at Laxey Wheel begins