Capable of conducting multidisciplinary oceanographic operations in support of biological, chemical, and physical process studies, Pisces was commissioned as the third of a class of five of the most advanced fisheries research vessels in the world, with a unique capability to conduct both fishing and oceanographic research. She is a stern trawler with fishing capabilities similar to those of commercial fishing vessels. She is rigged for longlining and trap fishing and can conduct trawling operations to depths of 6,000 feet. Her most advanced feature is the incorporation of United States Navy-type acoustic quieting technology to enable NOAA scientists to monitor fish populations without the ships noise altering the behavior of the fish, including advanced quieting features incorporated into her machinery, equipment, and propeller. Her oceanographic hydrophones are mounted on a retractable centerboard, or drop keel, that lowers scientific transducers away from the region of hull-generated flow noise, enhancing the quality of the data collected. To take full advantage of these advanced data-gathering capabilities, she has the Scientific Sonar System, which can accurately measure the biomass of fish in a survey area. She also has an Acoustic Doppler Current Profiler with which to collect data on ocean currents and a multibeam sonar system that provides information on the content of the water column and on the type and topography of the seafloor while she is underway, and she can gather hydrographic data at any speed up to 11knots. Pisces has a traction-type oceanographic winch which can deploy up to 5,000 meters of 17-mm wire rope, electromechanical cable, or fiberoptic cable. She also has two hydrographic winches, each of which can deploy 3,500 meters of 9.5-mm electromechanical cable, two trawl winches, each of which has a 35-metric-ton pull and can deploy 4,000 meters of 28.5-mm warp wire, and a Gilson winch. She has a telescopic boom and an articulated boom, each with a lifting capacity of 8,000 pounds frames, towed vehicles, dredges, and bottom corers, and she can deploy and recover both floating and bottom-moored sensor arrays. While trawling, Pisces uses wireless and hard-wired systems to monitor the shape of the trawl net and to work in conjunction with an autotrawl system that sets trawl depth and trawl wire tension and adjusts the net configuration. Pisces has a 56-square-meter wet laboratory, a 15-m² dry laboratory, a 27-m² chemistry laboratory, and a 46-m² acoustic and computer laboratory. She also has a 19-m² walk-in scientific freezer, a 9-m² controlled environment room, and a 5-m² preservation alcove. She has 145 m² of open deck space aft for fishing and scientific operations and another 33 m² of open deck space at the side sampling station on her starboard side. All of her discharge pipes empty off her port side so that fluids disharged will not contaminate samples collected at the station on her starboard side. In addition to her crew of 21, Pisces can accommodate up to 17 scientists.
Service history
Operated by NOAAs Office of Marine and Aviation Operations and with Pascagoula, Mississippi, as her home port, Pisces collects, monitors, and studies data on a wide range of sea life and ocean conditions, primarily in the waters of the United States exclusive economic zone in the Gulf of Mexico, Caribbean Sea, and Atlantic Ocean as far north as North Carolina. The ship collects data that scientists use to study variations in ocean conditions and sea life - including shrimp and other marine invertebrates, reef fish, and groundfish - to better understand the sustainability of fisheries, the structure and function of ecosystems, fish habitats and habitat restoration, coral reefs, and the status of protected species. She also makes weather and sea state observations, reports on other environmental conditions, conducts habitat assessments, and surveys marine mammal and seabird populations. During the latter half of 2010, Pisces conducted several cruises in the Gulf of Mexico to assess the effect of the BPDeepwater Horizonoil spill on marine life there and to monitor the water column in the vicinity of the Deepwater Horizon wellhead during post-spill wellhead testing.
