Observatory / Research Vessel
“Lake Biwa, Seta River Observatory” was completed along Seta River on February 16, 2008 as hub of investigation, research and observation in Lake Biwa and Seta River. It is equipped with laboratory and stockyard on the first floor for investigation and research, the classroom for lecture, practice, and workshop with a capacity of around twenty persons on the second floor, and the pier to moor two research vessels.

◆About Research Vessel
Research Center for Sustainability and Environment, Shiga University currently owns 2 research vessels, “Seiryu III ” and “Kosei III ”. They are actively utilized for investigation and research activities in Lake Biwa, experimental practices for both undergraduate and graduate students, training for students in elementary, junior high, and senior high schools, in-service teachers and general citizens.

 〈 Seiryu III 〉

High-speed water quality research vessel, “Seiryu III ” had been utilized by Center for Environmental Education and Lake Science during 1989 to 2003, but was remodeled as “Seiryu Ⅲ” and newly launched in March, 2006. After establishment of Research Center for Sustainability and Environment, “Seiryu III ” has been managed under control of the center, and used for various research project activities.
Its maximum number of passengers is 24, and investigations of water quality profiles such as water temperature, electrical conductivity, vertical distribution of turbidity, transparency, and pH are available. Observation of aquatic organisms and benthos is conducted after sampling of plankton and sediment. Sampling of deep-water is also available.
The vessel is made of corrosion-resistant aluminum alloy with which safety, sea worthiness, sea kindliness, and maneuverability are considered when being designed and constructed. Its stability is also fully taken notice. In addition, it is well environmentally friendly designed with fuel-efficiency performance and with minimum generation of nitrogen oxide and sulfur oxide in exhaust gas of the engine.

●≪ Features of Research Vessel ≫
Total Length
Main Engine
Diesel Engine
Total Widt
Cruising Distance
Propulsion Engine
3blades integral-type propeller
Total Depth
Fuel Tank
800L (diesel oil)
Over 25knot at maximum Over 20knot at a cruise condition


●≪ Main Equipments ≫
Fish finder (FURUNO FCV-1200L) True Wind Vane Anemometer (FURUNO FW-250)
Ekman-Birge type bottom sampler Liquid-crystal Color Video Plotter (FURUNO MODEL-1943C)
Plankton Net Wireless Equipment (Oki Electric Industry VM1135T)
Binocular Stereoscopic Microscope Current Meter for Towing Vessel (RD Instruments ADCP 600 kHz)
Laptop Van-Dorn Water Sampler (for 20Litter)
Page Printer Satellite Compass (FURUNO SC-50)
Head (Recirculation Type) Digital Water Temperature Meter (FURUNO TI-20E)
Refrigerator (DC24V-15W) Air-Conditioning and Heating Equipments
Inboard Broadcast Facilities (Amplifier, Radio, Indoor-Speaker, Outdoor-Speaker, Microphone)
Hydraulic Wire Winch (Larboard side: Lifting speed is variable. Load is over 100kg. )

Electric Capstan 2 pieces (in the center of front deck and starboard side: Load is over 200kg.)

●≪ Safe Fixings ≫
Life Ring
Life Jacket
Life Float
Powder Extinguisher
Marine Horn
Hygrothermograph etc.

●≪ Exterior Design ≫
   Yoshio YONOICHI, Assistant Professor

 〈 Kosei III 〉

“Kosei III ”, which launched on March 21st , 1997, was designed with importance attached to its speed and turning capability and with expected great performance during survey activities in waterweed growing areas and sublittoral zones. It runs with the speed of approximately 18knots, and is favorably compared with “ Seiryu “. The hull is smaller (about 3 tons) than “ Seiryu “, but it shows excellent turning characteristics with a short turning radius. The most distinctive feature is that it is navigable in shallow areas since introduction of the outdrive makes it possible to move up and down the screw and the helm with one push of a button.

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