Supporting a gas-fuelled future with STQ

Following the dual-fuel LNG ferry F.-A.-Gauthier, LR is classing two more LNG-fuelled ferries for Canada’s Société des traversiers du Québec (STQ).

STQ ferry case study

T he 92-metre dual-fuel ferries will  serve the vital Tadoussac – Baie Sainte  Catherine route across the mouth of  the Saguenay River, and will be powered  by Wärtsilä gas engines. They represent  new generation technology to support  STQ’s public service mandate and vision  to support society by offering effective  transport infrastructure in Québec.

The ferries are being constructed at Chantier Davie in Québec – Canada’s largest shipbuilding facility – and will have Wärtsilä 20DF units of varying sizes in arrangements that provide total redundancy under ‘safe return to port’ requirements. Other factors include ice protection to cope with the harsh winter conditions – the ferries have podded propulsion units with ice class IAS while the hull is ice class 1A.

Our solution

We helped STQ complete a full risk assessment to decide on the ships’ dual fuel arrangement.

Transport Canada, the federal  authority for transportation, which  has the responsibility for making vital  regulatory framework decisions is also associated with this project. Lloyd’s  Register plays an active role in helping  develop risk management approaches  and providing clarity to help with the  regulatory process. One of the vital  steps being taken is to train the crews  and shore staff to ensure that they are  equipped to deal with LNG.

The needs of the local communities, visiting tourists and environment have been taken into account as well. The emissions from the ferries will be free of particulates and sulphur, and will have vastly reduced NOx. And noise and vibration has been addressed to help ensure the whales which visit the area are disturbed as little as possible.

Client testimonial - Benoit Cormier, Project Management Office Director for STQ

"We will operate these  vessels for many years – perhaps 35 to  40 – so we wanted to try and find the  most modern technology and to meet  the requirement for cleaner solutions."