The data below is included for archival purposes. 

The most current data that we have is available via our new searchable
database of ships at:
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Yoko-Maru

Ship Name: Yoko-Maru (Japan)                           US NODC Code: 49YK           Ministry of Agriculture, Forestry and Fisheries

Contact: Dir. Research Planning Division
Operator: Seikai National Fisheries Research Laboratory
         49 Kokubu-Machi
         Nagasaki-Shi 850  Japan
  Phone: 958 22-8158
    Fax: 21-4494
  Cable:
  Email:

Length (M):  49.00       Range (n. mi.):      6700        Crew:           17
Beam (M):     9.20 

      Endurance (days):      30        Officers:        9
Draft (M):    4.35       Cruise speed (kt):   12.0        Scientists:      6
Gross Tons:    500       Max. speed (kt):     14.1        Air Cond.:     yes
Power (HP):   1600       Aux. Power (HP):      270

Main vessel activity
     Oceanography Fisheries Hydrography
     Year built: 79
     Ocean area where vessel operates: Yellow Sea; East China Sea
Capacities and working spaces
     Dry cargo holds:                     0m3
     Fuel:                              157m3
     Fresh water:                       108m3
     Wet laboratories (total area):      14m2
     Dry laboratories (total area):      14m2
     Fresh water generator capacity:      5m3
     Freeboard to working deck:         0.0m
     Free working deck area:              0m2
     Space for container laboratory:      0m x     0m
Design Particulars
     Hull materials: Steel
Energy sources
     Main engine(s): number:  1 make: Diesel    model:
     Power (BHP) each main engine:   1600 at    720rpm
     Diameter and max. rpm propeller:      2.700m     233rpm
     Total power auxiliary diesels:    270HP
Electrical systems
     AC Voltage:      0/   450V, total    300kVA,      3phase,     60Hz
     AC Voltage:      0/   450V, total    225kVA,      3phase,     60Hz
     DC Voltage:     24V, total     15V
     Stabilized system for scientific equipment:    100VAC     50AMP     60Hz
Fixed equipment
     Navigation and communication
     Nav. equip: Radar Loran SatNav Gyro DopLog
     Comms: Fax
     Comm sat:
     GPS:
Acoustic
     Echosounders for scientific research:     50kHz    200kHz
     Sonar: Sector-scan
     Provisions for silent ship operation: Silent Ship
Oceanographic
     Oceanographic winches:   number:  3
       Steel wire length:         5000m, safe working load:      0tons
       Conducting cable length:   1500m, safe working load:      0tons
       Trawl winch length:        1500m, safe working load:      2tons
       Other, specify:
                   length:        2000m, safe working load:      0tons
     Gantry
       Position:
       Clearance above deck:   0m and outboard extension:   0m
       Safe working load at max. reach:     0tons
     Crane
       Position:
       Clearance above deck:   0m and outboard extension:   0m
       Safe working load at max. reach:     0tons
     Other winches for instruments or sampling: Larvae Sampling Winch,1500 M.

Electronic data processing equipment permanently available on board
     Computer: NEC 9801:
Vessel construction and maintenance supervision
     Construction supervised by:
       Classification Society:
       Others, specify: MINISTRY OF TRANSPORT
Published vessel data
     Magazine: Yoko-Maru Chosa Kenkyu Houkoku       Issue:            14  Date: 01-dec-1991