SECTION SPONSOR
SUPPORT SERVICES
PROLONGED MULTI-PURPOSE SURVEYS FROM DATAFISH
North Sea Systems has developed a streamlined met-ocean data buoy, called DataFish, for prolonged multi-purpose surveys. The system provides a platform for the mounting of various sensors above and below the surface. The data from the sensors is stored on-board and also transmitted to where it is needed in real time.
ABOVE AND BELOW SURFACE Above the surface anemometers, cameras and GPS can be used to record atmospheric data, video and images, all calibrated to a time and position. Below the surface ADCPs can be used to measure current profiles, hydrophones for acoustic measurements, cameras for benthic surveys, ADVs for turbulence, sonar for monitoring marine life.
SIMULTANEOUS OPERATION Because there is a large on-board power supply many of these sensors
can be operated simultaneously. This saves the client cost because multiple surveys can be carried out from a single platform with fewer interventions required over the duration of the survey.
DataFish can either position sensors in the buoy looking downwards, part way down the mooring mounted in a streamlined housing or on the seabed. An electrical umbilical is used to tether the buoy, provide power to the sensors and retrieve data from the sensors.
RECENT WORK
Earlier this year the system was used to measure current profiles and subsea acoustic data from a tidal energy site near Yarmouth, Isle of Wight. The streamlined shape makes it very stable in tidal environments but also enables it to be towed to site which helps reduce the cost of deployment and recovery.
The hydrophone was mounted within a profiled mounting part way down the mooring line. The acoustic data was processed on-board and transmitted in real time allowing the client to monitor the activity on site and take action should noise levels reach unacceptable levels.
AUTONOMOUS MONITORING SYSTEM Similar projects have employed passive acoustic monitoring systems that have enabled the client to monitor the presence of marine mammals. Having an autonomous monitoring system operating 24/7 regardless of the conditions overcomes the limitations of Marine Mammal Observers and enables construction work to progress with fewer interruptions.
VERSATILITY
DataFish is a highly versatile platform built to withstand the most challenging of marine environments.
North Sea Systems
www.windenergynetwork.co.uk
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HULL & HUMBER SPOTLIGHT ON
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