The engines were fitted with oversized flywheels to increase the inertia of the propulsion system against ice impact .
The main engines were supercharged 12 - cylinder MaK 12M453 medium - speed diesel engines rated at 4,800 hp ( 3,600 kW ) each .
The diesel engines were fitted with oversized flywheels to increase the inertia of the propulsion system against ice impact .
The main engines were supercharged 12 - cylinder MaK 12M453 medium - speed diesel engines rated at 4,800 hp ( 3,600 kW ) each .