London-headquartered containership owner Global Ship Lease (GSL) has sealed a deal to acquire four 5,470 TEU Panamax containerships for $148m.

The vessels, which have an average age of around 11 years, are scheduled for delivery in the third quarter and will be chartered to a liner operator for a firm period of three years, with options for an additional three years.

GSL says the vessels will generate an adjusted EBITDA of around $124.4m over the firm charter period.

Earlier in the month, GSL agreed on a deal with Borealis Finance to acquire 12 containerships for a total of $233.9m. Once both acquisitions are finalized, GSL will own a fleet of 66 containerships.