Instrumented Small Craft

The AST has developed instrumented trailerable vessels with low initial and maintenance costs to economically and conveniently test and refine new survey equipment, train personnel on the use of the equipment, and to perform multi-disciplinary coastal surveys.

These vessels are outfitted with a variety of sensors such as multi-frequency echosounders, multi-beam sonars, passive acoustic arrays, meteorological sensors (e.g. wind-speed and direction, temperature, barometric pressure, humidity, and solar isolation), oceanographic sensors (e.g. CTD, fluorometer, and dissolved O2), underwater video, a scientific computing system (for data logging, processing, and archive), small-net sampling equipment (winches, nets, running fresh and sea water systems), a mast (for HF, VHF and radar antennas), generators and or battery power (12VDC and 115VAC), and necessary navigation, living, and safety equipment (GPS, VHF, radar, auto-helm, sleeping berths, galley, head, life-raft, survival suits, and EPIRB). By deploying such safe and capable vessels in the near-shore environment, large spatial-scale stock assessments can be put in the context of their prey and essential coastal habitats can be characterized on long temporal-scales.These boats are also used to assist other programs at SWFSC with projects such as Blue and Mako shark tagging and tracking, and abalone dive surveys. All of the AST vessels meet or exceed the NOAA Small Boat Safety Standards.

Captain Adam Jenkins AST Program Leader David Demer

Captain Adam Jenkins (left) and AST Program Leader David Demer acoustically mapping the nearshore krill population off Livingston Island, Antarctica, in February 2000.

R/V Ernest I

Ernest I is a 19’ Mark V Zodiac ™ fitted with a custom aluminum console for vessel navigation, scientific instrumentation, and power. The console was specified by AST and built by Shipwright Leif Knutsen of Big Foot Marine, in 1999. With this vessel, David Demer and Adam Jenkins pioneered nearshore surveys off of Cape Shirreff, Livingston Island, Antarctica, in February 2000. Ernest is equipped with a battery bank (4 x 105 A-H gel cells), VHF radio, GPS, 10cm RADAR, magnetic compass, 406 MHz EPIRB, and cabled steering control. For scientific instrumentation, Ernest is fitted with a 1 kW DC-AC inverter, an electric downrigger for deploying plankton nets, CTDs and underwater video cameras. She is also equipped with a retractable gimbaled pole for deploying multi-frequency echosounder transducers.

R/V Ernest I Moored off Cape Shirreff Base

R/V Ernest I moored off Cape Shirreff Base, Livingston Island, Antarctica, February 2000. This instrumented small-craft surveyed krill and their habitat within the foraging ranges of land-based seals and penguins (a portion of the stock previously inaccessible with the larger R/V's Surveyor and Yuzhmorgeologiya).

R/V Ernest II

R/V Ernest II is a 19’ Mark V Zodiac ™ fitted with a custom stainless steel and fabric dodger designed by AST for shelter and housing navigation equipment, scientific instrumentation, and power. Captain Steve Sessions and Researcher Joe Warren (SUNY) used Ernest II and a transom-mounted dual-frequency echosounder developed by AST to survey for krill off of Cape Shirreff, Livingston Island, Antarctica, in February of 2005 and 2006. Ernest is equipped with a battery bank (2 x 105 A-H gel cells), a 1 kW DC-AC inverter, VHF radio, GPS, magnetic compass, 406 MHz EPIRB, scientific computing system, CTD, and underwater video camera.

/uploadedImages/Operating_units/FRD/Survey_Technology/Ernest_II_2.jpg

R/V Ernest II transiting between the Cape Shirreff Base and the nearshore survey area in February 2005. Captain Steve Sessions (AST) and Researcher Joe Warren (SUNY) surveyed krill and their habitat within the foraging ranges of land-based seals and penguins using a dual-frequency echosounder, CTD, meteorological station, and underwater video camera.

R/V Roald

R/V Roald is a 19’ Mark V Zodiac ™ fitted with a custom stainless steel and fabric dodger designed by AST for shelter and housing navigation equipment, scientific instrumentation, and power. Captain Adam Jenkins and Researcher Martin Cox (St. Andrews University) used Roald and a transom-mounted multi-beam sonar array developed by AST to survey for krill swarms and bathymetry off of Cape Shirreff, Livingston Island, Antarctica, in February, 2006. Ernest is equipped with a battery bank (2 x 105 A-H gel cells), a 1 kW DC-AC inverter, VHF radio, GPS, magnetic compass, pitch-roll sensors, and a 406 MHz EPIRB.

R/V Roald

R/V Roald conducting a 200 kHz multi-beam sonar transect off Cape Shirreff, Livingston Island, Antarctica in February, 2006. The instrumented small-craft mapped krill swarms in three-dimensions over high-resolution canyon bathymetry. Concurrent observations were made of krill predator foraging activities.

R/V Ernest

Ernest is a customized 19’ aluminum Workskiff ™, powered by a 120 Hp Yamaha four-stroke outboard engine. The aluminum console, specified by AST and built by Shipwright Leif Knutsen of Big Foot Marine, is removable for use in Ernest I. Thus, Ernest is also equipped with a battery bank (4 x 105 A-H gel cells), VHF radio, GPS, 10cm RADAR, magnetic compass, 406 MHz EPIRB, and cabled steering control. For scientific instrumentation, Ernest is fitted with a 1 kW DC-AC inverter, an electric downrigger for deploying plankton nets, CTDs and underwater video cameras. She is also equipped with a davit, and a retractable pole for deploying multi-frequency transducers or a multi-beam sonar array.

R/V Dale Van Holliday

D.V. Holliday is a customized 32' Aluminum Chambered Boat ™, powered by a 310 Hp Volvo Penta diesel engine. She is large enough (12,500 lbs displacement) to permit coastal surveys to be safely conducted out to 100 n.mi. from shore, yet small enough to be trailerable. D.V. Holliday is safety equipped with a self-inflating life raft, 406 MHz EPIRB, GlobalStar satellite telephone, and two VHF radios. Navigation is facilitated by an electronic charting system that is integrated with the GPS, 10 cm stabilized Radar, dual-frequency echosounder, and automatic heading control. Survey operations are conducted from an aft work deck with hydraulic A-frame, 2000 lb. hydraulic winch with 1000' of Cat5e Kevlar reinforced tow/signal cable, and a davit with electric winch. Instrumentation currently includes Simrad EK60 multi-frequency echosounders (38, 70, 120 and 200 kHz) and a Simrad SM20/SM2000 200 kHz multi-beam sonar, passive acoustic sensors, underwater video, a Seabird SBE19+ CTD, WeatherPak 2000 weather station, IKMT plankton net, and a NOAA shipboard computing system. Dive operations are eased with a holder for 4 SCUBA tanks, dive ladders, and an electric anchor windlass. D.V. Holliday can sleep up to four persons, has a galley with refrigerator, freezer and stovetop, and a head with stand-up fresh-water shower.

/uploadedImages/Operating_units/FRD/Survey_Technology/DSCF0419.jpg

R/V Dale Van Holliday

/uploadedImages/Operating_units/FRD/Survey_Technology/DSCF0416.jpg
Last modified: 12/24/2014