Chinese box ship operator SITC has executed options for the construction of another two 2,400TEU container ships.
They are priced at US$25 million each.
The options are part of the newbuilding contract signed at the end of November for two 2,400TEU container vessels.
To be built at Jiangsu Yangzijiang Shipbuilding and Jiangsu New Yangzijiang Shipbuilding, the ships will be delivered in February and April 2020.
The first two vessels are due for delivery in October and December 2019.
In August SITC also ordered four 1,011TEU box ships at South Korea's Dae Sun Shipbuilding for a total cost of US$68 million. They will be delivered in 2019.