R/V SEWARD JOHNSON

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R/V SEWARD JOHNSON, namesake of HARBOR BRANCH founder J. Seward Johnson, Sr., is a 204-foot Oceanographic and Submersible-Support Research Vessel that was built in 1984, commissioned in 1985 and extensively rebuilt and stretched in 1994. With an 6000 nautical mile range and a speed of 13 knots, the vessel is capable of traveling and working in any of the world's oceans, while accommodating up to 40 people.

R/V SEWARD JOHNSON is one of two HARBOR BRANCH-owned research vessels that are operated by experienced personnel, expert in surface oceanographic procedures and submersible vehicle launch and recovery, supported by in-house ocean engineers. With 360 degree bow and stern thrusters, twin propellers and rudders, dynamic positioning and state-of-the-art precision navigation, this vessel has the capability to maneuver and position easily and efficiently and station-keep with the accuracy required by today's undersea and oceanographic research missions. R/V SEWARD JOHNSON is part of the University-National Oceanographic Laboratory System (UNOLS) fleet.

Typical applications include submersible/ROV support, large towed systems support, deployment and retrieval of moored devices, surface oceanographic/hydrographic applications, and diving support.

General Specifications - R/V Seward Johnson

  • Length Overall - 204 feet.
  • Length between Perpendiculars - 183 feet.
  • Beam Overall - 36 feet.
  • Draft - 12 feet.
  • Gross Tonnage - 285 GRT
  • Fuel Capacity - 60,000 Gal.
  • Fuel Consumption - 70 gal./hr., normal cruise.
  • Potable Water - 15,000 gal. with RO Unit (120 gal. hr.).
  • Accommodations - 40 (including crew).
  • Speed - 13 knots.
  • Year Built/Converted - 1984/1994.