Complex sentence: Four Wärtsilä 12V46C generate a power of more than 51,000 kW, which allow the ship to reach a top speed of 29 knots (53.70 km/h).
Split into simpler sentences: Four Wärtsilä 12V46C engines generate a power of more than 51,000 kW. These engines allow the ship to reach a top speed of 29 knots (53.70 km/h).