Energy
The primary energy source of Aurora Botnia is liquified natural gas, LNG. She can also run on marine diesel or liquified biogas. The ferry is bunkered (refueled) with LNG 5-6 times a week. The tanks are located below the waterline.
After mooring, automatic robot arms connect the shore power station with the ferry. While in port, Aurora Botnia uses renewable shore power to keep all necessary equipment running. At the same time, the onboard battery set is being recharged.
Power generation
The Wärtsilä 31 DF engines of Aurora Botnia create electricity instead of manually rotating the propellers. This setup allows flexible engine placement, better fuel efficiency, and lower emissions. It also enables quieter, smoother operation and easier integration with battery or hybrid systems.
The energy can be stored in Aurora Botnia’s battery pack which currently has a capacity of 2.2 MWh. The capacity will be expanded to 12.6 MWh in 2026.
Propulsion
Aurora Botnia is equipped with two ABB Azipod propulsion units. The units have a pod-mounted electric motor that can rotate 360°, allowing ferries to steer without a rudder. The system provides excellent maneuverability, fuel efficiency, and reduced emissions by enabling direct thrust in any direction.
Maneuvering
At the bridge, the captain maneuvers the ferry by rotating the Azipod units to direct thrust in any direction by using a joystick or control panel. Aurora Botnia is also equipped with bow thrusters to allow precise docking.
Navigation
At the bridge, the crew uses equipment such as radars, plotters and navigation computers to keep the ship on optimal course and within a safe distance from other traffic.
Despite the modern systems, the voyage and the surroundings are monitored by the crew at all times.
Stability
Boarding plan is made for every departure. Cars, trucks and other cargo units are strategically loaded to distribute weight evenly across the car deck.
By adding or removing seawater from ballast tanks the crew can adjust the ship’s trim (tilt forward/backward) and heel (tilt side to side). Having the ship leveled improves fuel efficiency and ensures passenger comfort.
