ROPOS and some of its instrumentation. Additional instruments that scientists attach to the ROV include: Imagenex pencil-beam sonar (high-resolution bathymetric mapping); Hot Fluid Sampler (vent water sampling); McLane pump and plankton net (collection of larvae in the water column); gastight bottles and wand (helium sampling); bio-box (biological sampling); and a suction sampler (collection of sediment and organisms). Image courtesy of Submarine Ring of Fire 2002, NOAA/OER.
