Two crossings brought forward and will now be operated by Manannan
Two of Tuesday's sailings have been rearranged due to scheduled maintenance on Manxman.
The Steam Packet Company says Manannan will now operate the Heysham route in the morning.
As a result, the 8.30am crossing has been brought forward to 7.30am, while the return journey at 2.15pm will now depart at 11.30.
A coach transfer for passengers coming from Heysham will depart from Lancaster station at 10am.
Any passengers wishing to amend their booking can do so through the Steam Packet's website, or by calling the operator's reservations team on 661661.

"We do have a housing crisis on the Isle of Man" says expert
Bill banning sale of nicotine pouches to under 18s due to get Royal Assent in November
Government funds 'not being allocated properly'
EAC to host special Hop-Tu-Naa screening of horror classic