Tanker brokerage Charles R Weber is unveiling a plan to offer shipowners and charterers voluntary carbon credits on voyages.

Weber co-managing director Christos Papanicolaou said the collaboration with California-based Bluesource comes after nearly a year of studying how to take part in the offsets market as the industry faces mounting regulatory pressures.

"You have to be careful who you team up with. We took almost a year to find the right counterparty, to make sure they stack up, and they do," Papanicolaou said.