Sea Technology

FEB 2018

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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28 ST | February 2018 This is a difficult task for vendors to achieve when de- signing an instrument for a specific AUV and application. Even if vendors can configure the instrument for different applications, integrations are not always straightforward. Vendors may deal with a number of constraints when designing the instrument's form factor for a specific AUV. In this case, integrators face the burden of purchasing multiple instruments, each configured or adapted to a specific AUV or application. Integration Issues A big concern shared among both vendors and in- tegrators is biofouling. From a vendor point of view, biofouling on or around instruments can result in poor data sets, giving integrators a false sense of poor instru- ment quality. It is in the vendor's best interest to devel- op anti-biofouling measures into new instrumentation to maintain data integrity. If anti-biofouling measures are not included in the development, then integrators would be at a big disadvantage for several reasons, which may include AUV operability, damage to AUV components and data loss. Because it is in both parties' interest to ac- tively combat biofouling, vendors will typically use mul- tiple anti-fouling measures such as copper or mechanical wipers to keep organisms from growing on instruments, and integrators will aid these efforts by using sacrificial anodes to minimize growth. Over the years, instrument calibration has been a con- troversial subject full of confusion as to how, what and why to calibrate. The primary objective when integrating fluorometers should be to ensure that the instrument has not drifted or changed during the mission. To check this, a calibration is not necessary. Instead, a measurement of a stable material is best. Calibration is used specifically for converting a raw response to engineering or concen- tration units when you read a solution with a known con- centration and want to set that correlation as the conver- sion factor for converting all raw data to estimates. This process would be required for end-users who want to view real-time or log concentration data without further processing and is independent of the instrument integrat- ed as long as the instrument has not changed. Technolo- gy has allowed for increased instrument stability through components like light-emitting diodes and photo diodes Never lose sight of what you need. • Easily mark or relocate anything in the water • Assortment of off-the-shelf pingers • Capability to develop specialty products | 949-727-9399 AN RJE Pinger is your insurance policy Results for chlorophyll, CDOM and turbidity from the day- long Nav2 surveys off of Florida's Gulf Coast. General Oceanics, Inc. introduces its new model 8050 autonomous pCO 2 monitoring system. Continuous measurement, recording and transmission of sea surface CO 2 levels. and confined air head space. • Infrared analysis of CO 2 concentrations. • Automatic calibration. • Integrated computer and contr e. • Integrated GPS location and atmospheric conditions. • Satellite data transmission. General Oceanics Inc. 1295 N.W. 163 St., Miami, FL 33169 Tel: (305) 621-2882, Fax: (305) 621-1710 E-mail: pCO 2

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