D. Vessel. Every type of water craft, other than a seaplane on the water, used or capable of being used as a means of transportation on the water. IV. DEFINITIONS A. Cruise Plan. B. Limnology. Any scheduled voyage. Scientific study of physical, chémical, meteorological, and biological conditions in fresh water, especially of ponds and lakes. C. Logbook. An official record for entries with respect to time of departures/arrivals, tests, drills, and inspection, fuel oil data, drafts, change of personnel assignments, casualties (personnel and material), unusual occurences, etc. Such logs or records shall be retained for the life of the vessel. D. Master (Qualified and Licensed). A person responsible for the operation of the vessel and who has had experience with similar vessels on a body of water like that on which the individual expects to operate and who holds a validated operator's or a superior license. E. Marine Supervisor. A person responsible for the state of readiness of the vessel and crews, scheduling tests and repairs, maintaining all records pertaining to vessels, and procuring supplies. F. Markings. Identification of emergency equipment, instructions and controls for the guidance of the persons on board in case of an-emergency. G. Owners Certificate. A letter, certificate or plaque certifying that the vessel is operated as an oceanographic research vessel under the laws of the United States. H. Oceanographic Research Vessel. A vessel.employed exclusively in oceanography or limnology, or both, or exclusively in oceanographic research, Fe 9008615 Page * of 29