Container ship owner Seaspan Corp has unveiled what it calls a new kind of financing deal worth $838m.

The vessel lessor, part of New York-listed Atlas Corp, said it was providing "fulsome details" of a transaction that has left only 10 ships in its mammoth 70-vessel newbuilding order without funding.

The financing is the first to see Japanese sale and leaseback equity backed by export buyer credit insurance from an export credit agency (ECA).