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:
'Suicide awareness isn't just one day - it's everyday"
Island's collective effort to mark World Suicide Prevention Day
ManxPACT calls on new MHKs to support mental health issues
Founder writing to election candidates to highlight 'horrendous' problem
Last chance for off-Island voters to register for postal ballot
Those elsewhere in the British Isles on election day must sign up for postal vote today
Great North Air Ambulance Service gets a 'super response' from Manx residents
Vital emergency service marks Air Ambulance WeekÂ
