Only able to travel at 14-15 knots rather than the normal 18 knots
The Ben-my-Chree is currently having to operate its engines at less than half its usual capacity.
It's because of energy efficiency restrictions that have been placed on the vessel.
The treasury minister has been responding to a question in the House of Keys.
Dr Alex Allinson says its hoped the impact on sail times - if it was needed - would be minimal:
Whistleblowing committee chair says protecting Island's reputation is 'most important'
Committee is now calling for evidence as part of investigation
People advised to stick to a budget ahead of festive sales
The Debt Advice Service is free for anyone who is worried about bills that are in arrears or struggling to meet regular monthly payments.
Meeting to discuss Minimum Wage increase
Businesses invited to event hosted by Local Economy Forum tonight
Collaboration event to focus on Manx Care's 'Home First' model
MCALS hosting two-day event at The Roundhouse in Braddan