The Ben my Chree will leave later for Douglas today.
The vessel is covering the Heysham route for the Manxman while she undergoes repairs, maintenance and trials on Merseyside.
She's due to leave Lancashire at 2.15 this afternoon, but will now set off at 3.15pm.
Her Douglas to Heysham crossing at 7.45pm will also be delayed and set off at 8.30pm.
Could you take over this former restaurant?
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