More sailings on Thursday are under threat from bad weather which is being forecast.
Voyages to Heysham tonight at 7.45pm and back to the Island at 2.15am tomorrow are already in doubt and now Thursday's 8.45am and 2.15pm services are also looking at potential disruption.
A final decision on this evenings crossing and early on Thursday will be made by 5.30pm today.
Meanwhile, a verdict on the services at 8.45am and 2.15pm on Thursday will be made no later than 7am tomorrow.
Manx community spirit shines through during Island storms
Free period products law receives Royal Assent
How are Islanders supported while waiting for benefits?
Specialist vans to survey Isle of Man roads next month
Great Laxey Wheel upgrades to see old ticket office removed
MHK to question plans for improving Island's mental health services
Colby Glen path shut until next April
If you Trick Or Treat, don't trouble the street!