Leading boxship owner Seaspan has returned to the newbuilding market with an order for five 12,200-teu containerships.

The company is ordering the neopanamax vessels on the back of an 18-year time charter to an unnamed liner company.

It said the charters will bring approximately $910m of contracted cash flows over the period.

The newbuilds are to be financed from additional borrowings as well as cash-on-hand.