Ammonia bulker start-up Viridis Bulk Carriers has signed up another charterer as it eyes its first vessel orders in 2023.

UK aggregates shipper Stema Shipping has become the eighth cargo owner to join the Norwegian Flexbulk-NH3 power project.

Viridis is a joint venture between Norwegian shipowner Mosvolds Rederi and its green shipping spin-off Amon Maritime, in partnership with Faroese owner Navigare Logistics.