fe D. Vessel. Every type of water craft, other than a scaplane on the water, used or capable of being used as a means of transportation on the water. IV. DEFINITIONS A. CruisePlan. B. Limnology, Any scheduled voyage. Scientific study of physical, chemical, meteorological, and biological conditions in fresh water, especially of ponds and lakes. ~ C.Y Logbook. An official record for entries with respect to time of departures/arrivals, tests, drills, and inspection, fuel ofl data, drafts, change of personnel assignwents, casualties (personnel and material), unusual ceurences, etc. Such logs or records shall be retained for the life of the veecel. os 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 holis a validated operator's or a superior license. E. MarineSupervisor. 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. OwnersCertificate. 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, Page 4 gp 30 S052u24