Mystic Cruises, the Portuguese expedition cruise operator, has placed an order for four expedition cruise ships at the West Sea shipyard in Portgual, the shipyard’s parent company said in a statement.

The total price of the order is €286.7 million and it brings the number of expedition cruise ships mystic Cruises has ordered from the same builder to seven. World Explorer, the first of these9,500 gross ton ships, entered service last year.

“The Polar Expedition vessels of the Explorer series are Cruise Class and will be built based on the Polar Code (ice class) and equipped with a hybrid propulsion system. Each one will have the capacity to accommodate 200 passengers and 112 crew members, with the highest quality and comfort standards,” said Martifer SGPS that owns the West Sea shipyard.