Three more Matson Inc. containerships are expected to be built within the next five years, after the Honolulu-based shipping company announced Nov. 2 that its subsidiary, Matson Navigation has inked agreements with Philly Shipyard Inc. for construction of a trio of 3,600-TEU Aloha Class container vessels for ships for about $1 billion.  Philly Shipyard is East Coast builder that constructed Matson’s two other 854-foot Aloha Class vessels, which came into service in 2018 and 2019. Philly Shipyard also built four Jones Act containerships for Matson between 2003 and 2006, the company said. “Our existing Aloha Class ships are among the…