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AUV System Spec Sheet

Nereid (NUI) platform

Manufacturer: Woods Hole Oceanographic Institution

Summary

Nereid Under Ice (NUI)

Overview

The Deep Submergence Laboratory at the Woods Hole Oceanographic Institution along with colleagues at Johns Hopkins University and the University of New Hampshire, and supported primarily by a grant from the National Science Foundation, has developed a robotic underwater vehicle that provides the Polar Research Community with a capability to tele-operate, under direct real-time human supervision, a remotely-controlled inspection and survey vehicle, under ice, and unconstrained by the motions of a support vessel. The Nereid Under-Ice (NUI) vehicle enables exploration and detailed examination of biological and physical ice-margin and under-ice environments through the use of high-definition video in addition to a range of acoustic, chemical, and biological sensors tailored to suit the needs of an individual expedition. The goal of the NUI system is to provide scientific access to under-ice and ice-margin environments that is presently impractical or infeasible.

In July 2014, NUI successfully completed it's first under-ice field expedition from aboard the Alfred Wegener Institute's ice-breaker Polarstern.   In addition to conducting engineering trials, the vehicle was equipped with various biological sensors for studying near-ice primary productivity (a comprehensive pumped fluorometry system (SUNA nitrate, Eco Triplet FL/BB/CDOM, SBE25+ CTD, FRRF, PAR), hyperspectral radiance and irradiance sensors (RAMSES ACC, ARC), upward-looking still camera and and Imagenex DT100 multibeam, in addition to a Wetlabs Eco doublet Chl/NTU and SBE49 FastCAT CTD, and upward and downward looking RDI 300 kHz ADCP/DVLs.

Capabilities

    ▪    Real-time exploration under direct human control far from influence of host ice breaker
    ▪    HD video and real-time visualization of mapping and survey data products
    ▪    Respond to features of interest by altering sensing modality and trajectory as desired
    ▪    Vertical mobility – access to pressure-ridges, melt-pools, crevasses, general close inspection and mapping.
    ▪    Land against underside of ice or on seafloor
    ▪    Precision access to under-ice boundary layer
    ▪    Access beneath glacial ice tongues and shelves
    ▪    Future manipulation, sample retrieval, and instrument emplacement capability

Physical Specs

  • Body Type: Oblate
  • Body Material: ABS
  • Size (LxWxH): 3.00m x 1.00m x 1.80m
  • Body Size (LxWxH): 3.00m x 1.00m x 1.80m
  • Maximum Depth: 2,000.00 m
  • Dynamic Buoyancy: No
  • Self-Righting: Yes
  • Manufacturer Website: Link

Primary Missions

  • Marine Science Survey
  • Oceanographic Survey
  • Photometric Survey
  • Seabed Mapping

Propulsion System

  • DOF: 6
  • Hovering: Yes
  • Buoyancy: No
  • Biomimetic: No
  • Thrusters: 8
  • Nominal Speed: 1.00
  • Maximum Forward Speed: 1.30

Configurations