Abstract : Funds submitted 2001 - 2005 to implement and sustain and ocean observing system for the Gulf of Maine have resulted in the organization widely known as GoMOOS. The technical program, implemented by scientists at University of Maine, Bigelow Laboratory of Ocean Sciences, Bedford Institute of Oceanography and Woods Hole Oceanographic Institution, includes 10 buoys collecting real-time observations of the ocean and atmosphere, predictive models of waves and circulation, testing of new technologies for monitoring nutrients and zooplankton, coordination of a variety of satellite measurements, a data management system to integrate all the data streams, a website to disseminate the information, a non-profit organization with over 40 member institutions representing the wide variety of users who need the data, and a headquarters in Portland, Maine that coordinates all the activities.