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Vessel Data and Contact Information for the
Justo Sierra

Last Updated -
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: Mexico

NODC Code:

    Call Sign: XCSN
Owner: Universidad Nacional Autonoma de Mexico
Operator: Coordinacion de Plataformas Oceanograficas
Contact: Dr. Ingvar Emilsson
Address: Coordinacion de Plataformas Oceanograficas
Edif. de Programas Universitarios, UNAM
C.P. 04510 Mexico D.F., Mexico
Telephone: (52) 55 56 22 52 10/11
Fax: (52) 55 56 22 52 09
Year Built: 1982
Ship URL: Unknown

Ship Schedule URL:


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Main Dimensions

  Length OA: 50  m
  Breadth: 10.3  m
  Freeboard to working deck: 2.5  m
  Max. draft: 4.7  m

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Main Vessel Activity

  Main Activity: General Oceanographic Research
  Operating Area: Gulf of Mexico, Caribbean and Western Tropical Atlantic
  Navy Grids Supported:

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Capacities and Working Spaces

  Gross tonnage: 638  GRT
  Dry cargo holds: 100  m3
  Fuel: 200  m3
  Wet Labs Area: 25  m2
  Dry Lab Area: 108  m2
  Fresh Water
 Storage Capacity:
46  m3
  Fresh Water Generator Capacity: 8  m3/day
  Scientific Clean Water Generation: Clean Sea Water 15 l/min
  Free Working Deck Area: 102  m2
  Space for container lab: 10 x 6  m
  Radioactive Isotope Work Areas: none specified  m

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Range, Speed and Endurance

  Range: 6500  nautical miles
  Cruising Speed: 12  kts.
  Max. Speed: 13.5  kts.
  Endurance: 30  days

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  Officers: 6
  Other crew: 9
  Scientists: 21
  Air Conditioned:  Yes

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Data Processing Equipment:

  Computers: 8 PCs interconnected
  Printing/Plotting: 3 units

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CTD Specifications:

  CTD Aboard: yes
  CTD Type: Marc III/Woce
  CTD Tow able: no
  CTD Oxygen Sensing: yes
  CTD Transmissivity: yes
  CTD Fluormeter: yes
  CTD Rosette: yes

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Coring Specifications:

  Coring Capabilities Aboard: Stern "A" frame for 8 tons, winch 10 ton traction, etc.
  Grab Sampler: yes
  Box Corer: yes
  Gravity Corer: yes
  Piston Corer: yes
  Multi Corer: yes

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Underwater Vehicle Capabilities:

  Underwater Vehicle Support: yes
  ROVs: yes
  AUVs: yes
  Submersibles: yes

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Diving Support:

  Diving Capabilities: Scuba and Compressor available. Huperbaric chamber supported

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Engineering Design Particulars


Ice Breaking Ability:


Hull Materials:

  Dynamic Positioning Ability: none
  Engines: Main engine(s): number:  1   make:  Alpha Diesel B&W/V12
Power (BHP) each engine:  1800 at 800rpm
Propeller Diameter:  2.55   m Max. RPM:   245
Total power auxiliary diesels:  640   HP
  Electrical Systems:  


 Voltages: 120V/220V /440V
     kVA: 550
    Phases: 3/3


60/60  Hz

Stabilized System:   VAC   AMPs    Hz



  24   Volts with  24  Volts Max


Fixed Equipment

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Navigation and Communication:

  Navigational Equipment: Radar, Loran, Gyro, DopLog, Gonio, Electronic Charts
  Communications Equipment: GMDSS, SSB Transreciever and VHF
  Satellite Communications Equipment: Inmarsat C, Satellite phone voice and data
  GPS: yes

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Acoustics and Profiling:

  Echosounders: O.R.E. 7, 12, and 120kHz paper; Simrad EK 60, 38 and 70kHz digital. Simrad EA 400 38kHz
  Sonar Type: Simrad ST 21kHz, paper
  Sea Surface Mapping System: no
  Side Scanning: no
  Multibeam: none
  Acoustic Doppler Current Profiler: yes
  Silent Ship Operations: n/a

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  Winches: 5  
    Steel Wire Length: 3000  m,  safe working load:  1  tons
    Conducting Cable Length:  5000  m , safe working load:  1.5  tons
    Trawl winch length:  1500  m , safe working load:  10  tons
    Other Winches:
      Length:  5000  m , safe working load:  10  tons
  Gantry: Position: Stern

Clearance above deck:  7  m , and outboard extension:  3  m


Safe working load at maximum reach:  7  tons

  Crane: Position: Shelterdeck aft, starboard side

Clearance above deck:  4  m  and outboard extension:  11  m


Safe working load at maximum reach:  4  tons

  Other:   none

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Vessel Construction and Maintenance Supervision

  Construction Supervised by: Owners Naval Architects
  Classification Society: Det Norske Veritas
  Others, Specify: Owners Technical Personnel
OCEANIC - Ships Schedules & Information Pages
University of Delaware, College of Earth, Ocean, and Environment
Lewes, Delaware  19958
Phone:  (302) 645-4225