Alternative term: Ocean Data Acquisition Systems buoy
A buoy intended for the collection of data on properties of the ocean. It may be moored or free-floating. It is not an aid to navigation but is classified as a special buoy in the IALA Maritime Buoyage System.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM