Seaspan says it will have to find new charters for ships redelivered from collapsed containership operator Hanjin or it may be forced into early repayment of debt on the ships.

The disclosure came in a prospectus for a $150m offering of preferred shares led by investment bank FBR.

Seaspan said the three 10,000-teu vessels returned from Hanjin accounted for contracted future revenue of $361.8m