I've tried increasing that <Moves> number under Great Admiral and Workboat XML entries in CIV5Units.xml, CIV5Units_Expansion.xml, CIV5Units_Expansion2.xml, and CIV5Units_Inherited_Expansion2.xml but that doesn't seem to do anything. And I've never even figured out where the Embarked setting might be. Does anyone know how to increase Embarked, Great Admiral, and Workboat movement rates?