NDLI: Oceanographic profiler for shallow water

Content Provider	IEEE Xplore Digital Library
Author	Casale, J. Merrill, J.S. Sullivan, R. DiMassa, D. Fowler, A.
Copyright Year	2003
Description	Author affiliation: Massachusetts Univ., North Dartmouth, MA, USA (Casale, J.; Merrill, J.S.; Sullivan, R.; DiMassa, D.; Fowler, A.)
Abstract	This paper is a detailed explanation of the design and development of a small, inexpensive oceanographic profiler. The profiler is easy to deploy and recover, is expendable, and can be deployed in large quantities over a broad area to take synoptic measurements. The profiler uses a ballast tank, altering buoyancy to descend and ascend. To detect the pressure at the maximum depth of 50 meters, a simple pressure switch is used. At 50 meters the pressure creates a force great enough to puncture a pressurized 12-gram CO/sub 2/ canister. The pressurized gas feeds into the ballast tank forcing the water out, and the now positively buoyant profiler ascends to the surface. Testing showed that the descent rate could be controlled from 3 to 20 centimeters per second by adjusting the net weight of the device. Also the pressure switch worked at a range of depths with an accuracy of 5 meters, before returning to the surface. A rod with a foam ball, painted international orange, attached to the top of the device allows easy recovery in relatively calm waters. This ball is suspended approximately 45 centimeters above the surface when the profiler returns at the end of a deployment. The prototype is a flexible platform that can accommodate a variety of payloads and descent rates.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	780
Ending Page	785
File Size	397947
Page Count	6
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178413
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Switches Mechanical engineering Sea surface Electronic ballasts Sea measurements Costs Area measurement Feeds Testing Prototypes
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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