Beginning with the upcoming launch of the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), there should be almost continuous measurements of ocean color for nearly 20 years if all of the presently planned national and international missions are implemented. This data set will present a unique opportunity to understand the coupling of physical and biological processes in the world ocean. The presence of multiple ocean color sensors will allow the eventual development of an ocean color observing system that is both cost effective and scientifically based. This report discusses the issues involved and makes recommendations intended to ensure the maximum scientific return from this unique set of planned ocean color missions. An executive summary is included with this document which briefly discusses the primary issues and suggested actions to be considered. Abbott, Mark R. and Brown, Otis B. and Evans, Robert H. and Gordon, Howard R. and Carder, Kendall L. and Mueller-Karger, Frank E. and Esaias, Wayne E. and Hooker, Stanford B. and Firestone, Elaine R. Goddard Space Flight Center ...