In Situ Fluorometer/CTD System

The Lockheed Ocean Laboratory of Lockheed Missiles and Space Co. has completed development and testing of a towed in-situ fluorometer/CTD system capable of simultaneously measuring optical and hydrographic parameters. The towed body or \´fish\´ houses an optical sensor; conductivity, temperature and pressure transducers; and A-to-D and multiplexing electronics. A 3/16" power/data cable links the fish to a portable, electric-powered winch, fathometer assembly, and a shipboard microprocessor controlled data logging system. All data are digitally recorded and selected parameters including ship\´s position can be plotted and digitally displayed in real time. Field tests of the system have been successfully performed and survey techniques established by conducting a dye tracer study at a local ocean outfall of multiport diffuser design. A system description, field test data, and applications are presented.