vessel of opportunity on fixed route A platform repeatedly following a predictable fixed track on the surface of the water column that collects scientific (oceanographic and meteorological) data (e.g. an instrumented ferry). 2006-07-07 10:38:37.0 SDN:L06::35 SDN:L06::35 SDN:L06::35 1 1 2006-07-07 10:38:37.0 accepted false