ECS North Star was a starship in the Earth Cargo Service that operated in the first part of the 22nd century. Former ECS Fortunate first officer Matthew Ryan grew up on the North Star, living with his parents on board that ship.
Some time prior to 2151, the ECS North Star was nearly destroyed. Ryan's parents were among the casualties in this disaster. After being rescued Ryan transferred to the Fortunate, where he eventually became the first officer. (ENT episode: "Fortunate Son")