Global Ship Lease (GSL) is looking to acquire more secondhand boxships after buying seven older post-panamaxes last month in a $116m sale-and-leaseback deal with AP Moller-Maersk.

The latest en-bloc purchase brings the New York-listed owner's fleet count to 50 ships, but the Ian Webber-led company is still on the prowl for more used assets in today's "hot" market.

"We will be focusing on midsize, middle-aged ships rather than young ships," executive chairman George Youroukos said on Thursday during a fourth-quarter call with analysts.