Finland's Containerships has added two options to its series of dual-fuel vessels being built in China.

The company said it now has a deal in place for four firm boxships plus four options at Guangzhou Wenchong Shipyard.

The new 1,400-teu units, partially powered by LNG, are being built in co-operation with shipmanagement company Nordic Hamburg.

Containerships is the main owner of the first four units.

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