Norwegian environmentalist group Bellona has called for more transparency in passengership scrapping after one of two Fred Olsen Cruise Lines vessels sold for further operation wound up in the hands of a Turkish cash buyer.

Sigurd Enge, head of shipping at Oslo-based environmental non-governmental organisation Bellona, said owners that value their green reputation have an added responsibility, especially those with very old ships nearing demolition.

"It's all about the transaction and the transparency," Enge told TradeWinds.