Fuzzy Logic has found significant interest in the context of global shipping networks due to its applicability to uncertain decision making environments. Its use has been particularly important when solving location and equipment selection problems. While being applicable as a stand-alone technique, Fuzzy Logic has become increasingly interesting as an added feature within classic Operational Research techniques. This paper gives an outline of the methodological relevance of Fuzzy Logic at a strategic, tactical and operational level for maritime operations. In addition, a general classification of decision problems in maritime logistics is presented, extending previous classifications in the literature to the wider context of multiple port networks.