This document discusses factors that will influence which ship types and routes are early adopters of LNG fuel, including ship volume and weight limitations, voyage length, fuel price savings potential, gas availability, and cargo space requirements. It presents a matrix positioning different ship types based on these attributes, and suggests that container ships, car carriers, ferries, and cruise ships may be early adopters, while bulkers and tankers may be last or slow to adopt LNG fuel due to challenges around space requirements and gas availability on global routes.