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Vessel Data and Contact Information for the
Seward Johnson II

Last Updated - 2/3/2005
Main Activities
Capacities & Workspaces
Range, Speed, Endurance
DP Equipment
CTD Specs
Coring Specs
Underwater Vehicles
Diving Capabilities
Engineering Design
Navigation & Communications
Acoustics & Profiling
Winches, Gantries & Cranes
Country: USA

NODC Code:

    Call Sign: WST4798
Owner: Harbor Branch Oceanographic Institution (HBOI)
Operator: Harbor Branch Oceanographic Institution (HBOI)
Contact: Tim Askew
Address: Harbor Branch Oceanographic Institution
5600 U.S. 1 North
Ft. Pierce, FL 34946
Telephone: 772-465-2400 x262
Fax: 772-465-2116
Year Built: 1982
Ship URL: Link to Ship Home Page

Ship Schedule URL:

Ship Schedule via its Home Page

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Main Dimensions

  Length OA: 51.2  m
  Breadth: 11.58  m
  Freeboard to working deck: Unknown
  Max. draft: 3.35  m

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Main Vessel Activity

  Main Activity:
  Operating Area:
  Navy Grids Supported:

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Capacities and Working Spaces

  Gross tonnage: 288.19  GRT
  Dry cargo holds: Unknown
  Fuel: 234.67  m3
  Wet Labs Area: 20.438  m2
  Dry Lab Area: 31.77  m2
  Fresh Water
 Storage Capacity:
147.615  m3
  Fresh Water Generator Capacity: 4.54  m3/day
  Scientific Clean Water Generation: Reverse Osmosis
  Free Working Deck Area: Unknown
  Space for container lab: Unknown
  Radioactive Isotope Work Areas: Unknown

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Range, Speed and Endurance

  Range: 7000  nautical miles
  Cruising Speed: 11  kts.
  Max. Speed: Unknown
  Endurance: Unknown

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  Officers: Unknown
  Other crew: 11
  Scientists: 27
  Air Conditioned:  Yes

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Data Processing Equipment:

  Computers: Unknown
  Printing/Plotting: Unknown

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CTD Specifications:

  CTD Aboard: Optional Seabird 911 CTD/Carousel
  CTD Type: Seabird 911
  CTD Tow able: Unknown
  CTD Oxygen Sensing: Unknown
  CTD Transmissivity: Unknown
  CTD Fluormeter: Unknown
  CTD Rosette: Unknown

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Coring Specifications:

  Coring Capabilities Aboard: Unknown
  Grab Sampler: Unknown
  Box Corer: Unknown
  Gravity Corer: Unknown
  Piston Corer: Unknown
  Multi Corer: Unknown

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Underwater Vehicle Capabilities:

  Underwater Vehicle Support: Unknown
  ROVs: ROV SUpport
  AUVs: Unknown
  Submersibles: Unknown

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Diving Support:

  Diving Capabilities: Diving support

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Engineering Design Particulars


Ice Breaking Ability:


Hull Materials:

  Dynamic Positioning Ability: Unknown
  Engines: Main engine(s): number:  2   make:  16V 149 Detroit Diesel
Power (BHP) each engine:  940 ea at 1800rpm
Propeller Diameter:  Unknown
  m Max. RPM:   Unknown
Total power auxiliary diesels:  190   HP
  Electrical Systems:  


 Voltages: 440/208/110
     kVA: 190
    Phases: 3


60  Hz

Stabilized System:  Unknown  VAC  Unknown  AMPs   Unknown  Hz



  Unknown   Volts with  Unknown  Volts Max


Fixed Equipment

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Navigation and Communication:

  Navigational Equipment: Radar Simrad Enritsu
  Communications Equipment: Nera B Satellite Comm, Drake VHF, SSB, NECODE-Encoder/Decoder
  Satellite Communications Equipment: Inmarsat B
  GPS: Magnavox MX200 GPS

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Acoustics and Profiling:

  Echosounders: 3.5kHz 38kHz 50kHz
  Sonar Type: Unknown
  Sea Surface Mapping System: Unknown
  Side Scanning: Unknown
  Multibeam: Unknown
  Acoustic Doppler Current Profiler: RDI 150 & 600 kHz ADCP
  Silent Ship Operations: Unknown

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  Winches: Unknown  
    Steel Wire Length: Unknown  safe working load:  Unknown
    Conducting Cable Length:  Unknown , safe working load:  Unknown
    Trawl winch length:  Unknown , safe working load:  Unknown
    Other Winches:
      Length:  Unknown , safe working load:  Unknown
  Gantry: Position: Unknown

Clearance above deck:  Unknown , and outboard extension:  Unknown


Safe working load at maximum reach:  Unknown

  Crane: Position: Unknown

Clearance above deck:  Unknown  and outboard extension:  Unknown


Safe working load at maximum reach:  Unknown

  Other:   Unknown

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Vessel Construction and Maintenance Supervision

  Construction Supervised by: Unknown
  Classification Society: ABS: Hull & Machinery
  Others, Specify: Unknown
OCEANIC - Ships Schedules & Information Pages
University of Delaware, College of Earth, Ocean, and Environment
Lewes, Delaware  19958
Phone:  (302) 645-4225