New York-listed Seaspan plans to stay in its containership wheelhouse following its multimillion-dollar investment in privately held OSV owner Swiber Holdings.

"This I'd view as a one-off opportunity," Matt Borys, Seaspan head of investor relations, told TradeWinds.

"We're not going to get into offshore construction."

Borys said Seaspan will continue its focus on the boxship sector while Swiber will remain an OSV owner.