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OCADSRyofu Maru Vessel Data

Ryofu Maru Vessel Data

Vessel and Contact Information

Ryofu Maru (Japan)

Call Sign:
US NODC Code: 49RY
Owner: Ministry of Transport
Operator: Japan Meteorological Agency
Contact: Mr. I. Eguchi
1-3-4, Otemachi, Chiyoda-Ku
Tokyo 100 Japan
Telephone No.: 03 32114966
Telefax No.: 32112031
Year built: 66

Main vessel activity

Oceanography Meteorological Research
Ocean area where vessel operates: Pacific, Northwest

Main dimensions

Length OA: 79.20m
Breadth: 12.00m
Freeboard to working deck: 2.2m
Max. draft: 4.35m

Capacities and working spaces

Gross tonnage: 1599GRT
Dry cargo holds: 0m3
Fuel: 371m3
Fresh water: 289m3
Wet laboratories (total area): 75m2
Dry laboratories (total area): 81m2
Fresh water generator capacity: 4m3
Free working deck area: 0m2
Space for container laboratory: 0m x 0m

Range, speed and endurance

Range: 15000n. mi.
Cruising speed: 13.0kts.
Max. speed: 16.1kts.
Endurance: 50days


Officers: 11
Other crew: 23
Scientists: 15
Airconditioned: no

Design Particulars

Hull materials:


Energy sources

Main engine(s): number: 1 make: Diesel model:
Power (BHP) each main engine: 3260at 367rpm
Diameter and max. rpm propeller: 2.200m 367rpm
Total power auxiliary diesels: 0HP
Electrical systems
AC Voltage: 0 / 440V, total 495kVA, 3phase, 60Hz
AC Voltage: / 0V, total 0kVA, 0phase, 0Hz
DC Voltage: 0V, total 0V
Stabilized system for scientific equipment: 0VAC 0AMP 0Hz

Fixed equipment

Navigation and communication

Nav. equip: Radar Loran SatNav Gyro EMLog
Comms: Fax
Comm sat:


Echosounders for scientific research: 12kHz
Provisions for silent ship operation:


Oceanographic winches: number: 3
Steel wire length: 2000m, safe working load: 0tons
Conducting cable length: 6000m, safe working load: 1tons
Other, specify: Steel Wire length: 5000m safe working load: 1tons
Winch for bottom sampling, wire length: 8000m, safe working load: 2tons
Clearance above deck: 0m and outboard extension: 0m
Safe working load at max. reach: 0tons
Position: Stern
Clearance above deck: 6m and outboard extension: 3m
Safe working load at max. reach: 1tons
Other winches for instruments or sampling:

Electronic data processing equipment permanently available on board


Vessel construction and maintenance supervision

Construction supervised by:

Classification Society:
Others, specify:

Published vessel data

Last modified: 2021-03-17T18:30:28Z