This document summarizes a probabilistic analysis of marine fuel options in emission controlled areas. It outlines the methodology used, which involved deterministic and probabilistic decision analyses of three fuel alternatives: a two-stroke diesel engine with scrubbers, an LNG-fueled engine, and a dual-fuel engine. The analysis found the optimal decision was diesel under deterministic analysis but changed to LNG when accounting for uncertainties in fuel prices, regulations, and other factors. Sensitivity analysis showed LNG became optimal with small changes to diesel and LNG prices or engine downtime. Risk analysis found the optimal decision shifted from diesel to LNG to dual-fuel as risk aversion increased.