Page 60: of Marine Technology Magazine (October 2012)

Ocean Observation: Gliders, buoys & sub surface monitoring networks

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Products Coastline Surveys Takes DATEM 5000 CPT System Coastline Surveys has taken delivery of its new Datem 5000 CPT System (C-Pen35). After a series of accep- tance tests the system was delivered on-time to Scotland and has imme- diately commenced work on a cable route survey in the North Sea for the Renewables Sector. The DATEM 5000 unit is a coiled rod design offering the latest technology and increased push capability compared to similar CPT designs available. The C-PEN35 system is designed for performing insitu soil testing from nearshore to water depths up to 3,000m. The unit is compact enough for deploy- ment from smaller vessels of 20- 25m length making it a versatile and adaptable system for most client applications and soil types and impor- tantly reducing overall vessel spread costs to Clients. The Cone Penetration Test concept is based on pushing a calibrated steel cone into the ground at a constant speed of 2 cm/sec, with continuous measurement of the cone end resistance, sleeve friction along the cone, and the pore water pressure. These measurements make it possible to accurately determine insitu ground condition strengths and infer stratigraphy over the penetrated depth and is often used in conjunc- tion with vibrocoring and geophysical surveys also undertaken in house. OceanWiseOff-the-Shelf Marine Mapping DatasetsOceanWise Ltd, has established off-the-shelf marine mapping datas- ets that meet the needs of the most demanding applications. These da-tasets include Raster Charts, Marine Themes and the recently released Marine Themes DEM. All are avail- able on-line for immediate download from established digital mapping providers, and FIND Mapping. OceanWise mapping and data management products are being used widely across central and local Government, NGOs and the com- mercial sector. OceanWise has now added scale independent, seamless feature layers to its acclaimed vector dataset, Marine Themes. AXYS Ocean Sentinel Supporting Wave Renewable Energy AXYS Technologies delivered an Ocean Sentinel buoy and TRIAXYS buoy to the Northwest National Marine Renewable Energy Center, or NNMREC, at Oregon State University. The equipment is part of a mobile wave energy test facility that will be used by academic researchers and device developers to test wave energy technologies that will measure wave resources and assist in the study the energy output and other environmen- tal issues.The delivery of the Ocean Sentinel represents a milestone achievement by AXYS in the development of an advanced power and control monitor- ing buoy. AXYS engineers worked with NNMREC staff to develop this custom buoy system that interfaces with numerous custom control and monitoring devices, as well as basic meteorological and oceanographic parameters. They system also pro- vides, real time communications that monitors all aspects of the system performance. The Ocean Sentinel platform is based on a NOMAD 6m hull design with four large watertight compart- ments. Data from the buoys are collected by AXYS? onboard Watch- Man500 data acquisition system and transmitted to a shore station by satellite and cell phone telemetry. In addition, this buoy also has an Auto- matic Information System (AIS) trans- mitter which transmits buoy position and environmental data to passing ships. The AXYS? Data Management System (DMS) permits remote control and conÞ guration for the entire buoy network, down to the individual sen- sor. The AXYS TRIAXYS directional wave buoy will be deployed separately from the Ocean Sentinel and will pro- vide precision wave measurements to quantify the wave resources in the test facility local. AXYS also designed and provided a custom 3 point moor- ing and deployment procedures for the Ocean Sentinel.ClearSignal Glider Completes 5-month Mission Severn Marine Technologies (An- napolis, MD) and Scripps Institute of Oceanography (SIO) (La Jolla, CA) recently completed a 135-day mission where the Spray Glider was coated with the Clear Signal Biofoul- ing control system. Half of the glider was coated with Clear Signal in order to qualify the coating for much larger scale use on the Spray Glider. The coated quali Þ cation occurred during a normally scheduled science mission in Monterey Bay for gathering oceano- graphic data.The results showed the Clear Signal coating to be highly effective in con- trolling the growth of biofouling on the glider. There reportedly was no bio- fouling accumulation on the coated sections while the uncoated sections showed moderate to high biofouling. The coating showed no signs of wear and is designed to last for the life of the glider. As a result of its success SIO will be coating multiple Spray Gliders with the Clear Signal Biofoul- ing Control System. Email: October 201260 MTRMTR #8 (50-64).indd 60MTR #8 (50-64).indd 6010/3/2012 2:45:22 PM10/3/2012 2:45:22 PM

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