The Steam Packet's services to Liverpool will resume as normal today.
All Manannan's sailings to and from Liverpool were cancelled yesterday, due to a generator failure mid-voyage in the morning crossing.
The company said engineers worked through the night to fix the problem with the fast craft's generators.
After testing overnight was successful, it says the sailing will depart as scheduled at 7.15am.
Framework of new Sea Services Agreement ready, says minister
Attorney General says he's stepping down
Road closures in two towns for running event this week
Six weekend ferry crossings could face disruption
President of Tynwald announces retirement
Police close Mountain road
Fuel firm says "fingers crossed" for calmer energy costs
Ring doorbells will need data protection registration - but shouldn't cost you money