Hess Frederick R.

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Hess

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Frederick R.

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Remote acoustic sensing of the particulate phase of industrial chemical wastes and sewage sludge : report on the seasonal variability of the dispersion of the particulate phase as observed from three cruises, July 1977, January-February 1978, and April 1978

(Woods Hole Oceanographic Institution, 1980-01) Orr, Marshall H. ; Baxter, Lincoln ; Hess, Frederick R.

The seasonal variability of the dispersion of the particulate phase of industrial chemical waste has been studied with acoustic backscattering techniques at Deep Water Dumpsite 106 (DWD 106). The vertical dispersion of the particulates has been found to be strongly dependent on the depth of the mixed layer and the magnitude of the density gradient associated with the seasonal thermocline. The horizontal dispersion of the particulates as a function of depth has been found to be strongly dependent on the shear present in the water column. Entire waste plumes have been found to be advected out of the dumpsite in less than 24 hours when the area is occupied by a warm core ring. Simple calculations based upon Stoke's law are presented to reveal the impact of variable oceanic density structure on the sink rate of particles and to indicate the need for incorporating these considerations into numerical models. A short discussion is presented on (1) the need to make field measurements on the magnitude of both turbulence and shear in the water column and (2) the need to incorporate shear and turbulence-dependent calculations for the sink rates of particles into those numerical models which may be used to predict the particulate and effluent dispersion rates at DWD 106.
Technical progress report : advanced marine technology 1 August 1973 - 31 January 1974

(Woods Hole Oceanographic Institution, 1974-05-15) Ballard, Robert D. ; Hays, Earl E. ; Hess, Frederick R. ; Marquet, William M. ; McCamis, Marvin J. ; McElroy, Paul T. ; Winget, Clifford L.

Contrary to the statement in the previous progress report (WHOI-73-92) we have decided to issue the final technical reports on Submerged navigation, Hydraulic Impact Hammer, Deep Sea Rock Drill and the Self Contained Ancillary Modular Package (SCAMP) as separate reports. These are underway in various stages and will be issued as completed. This six months has seen successful use of the navigation system in direct and surface bounce modes, testing of the "lock on" system of SCAMP to an ALVIN model and steady progress in the Modular Acoustic System.
Technical progress report : advanced marine technology 1 February 1973 - 31 July 1973

(Woods Hole Oceanographic Institution, 1973-12-01) Ballard, Robert D. ; Maxwell, Arthur Eugene ; Davis, Ray E. ; Eliason, Andrew H. ; Hess, Frederick R. ; McCamis, Marvin J. ; McElroy, Paul T. ; Marquet, William M. ; von Herzen, Richard P. ; Williams, David L. ; Winget, Clifford L.

This report covers a period which finds several of the projects nearing completion. It is expected that the next semi-annual report should contain final technical reports on Submerged navigation, Hydraulic Impact Hammer, Deep Sea Rock Drill and the Shelf Contained Ancillary Modular Package (SCAMP). It is possible that extensive testing and use of SCAMP will not take place until next year. The responsibility for these worthwhile equipments then shifts to the users, who in most cases has been intimately involved in the development. The Submerged Navigation system continues to attract much attention both within and without the Institution. Delays in the fitting and testing of ALVIN in the Titanium hull configuration has slowed the field work with ARPA developed equipment bu the next six months should contain considerable work.
Technical progress report : advanced marine technology 1 February 1974 - 31 July 1974

(Woods Hole Oceanographic Institution, 1974-12-15) Hosom, David S. ; Hays, Earl E. ; Hess, Frederick R. ; McElroy, Paul T. ; Marquet, William M. ; Porter, Robert P. ; Spindel, Robert C. ; Winget, Clifford L. ; Striffler, Foster L.

The navigation system previously reported on is currently (July 1974) being used by ALVIN in a study of Mid-Atlantic Ridge as part of Project FAMOUS. According to all reports the system is a most important factor in making the project successful so far. Engineering design, construction and testing are the main efforts in the subjects summarized below with more detail later on.
Ping-through-the-hull 3.5 kHz echo-sounding systems on the research vessels CHAIN, ATLANTIS II, and KNORR

(Woods Hole Oceanographic Institution, 1978-02) Knott, Sydney T. ; Hess, Frederick R. ; Witzell, Warren E. ; Young, Earl M.

This report documents the 3.5. kHz sounding systems currently in use on Woods Hole research vessels. To help others to install similar facilities, we discuss the history, installation technique, performance and calibrations of our various systems.
An inexpensive radar-responding relocation device for drifting oceanographic instruments

(Woods Hole Oceanographic Institution, 1985-02) Hess, Frederick R.

The instrument described was designed to provide sufficient data to relocate a floating object at sea. It provides a line of bearing to the object from the tracking ship. Cost and power consumption were the major driving concerns. There is a minimum of microwave circuitry. The package is reproducible for under $2000.
Remote acoustic monitoring of natural suspensate distributions, active suspensate resuspension, and slope/shelf water intrusions

(Woods Hole Oceanographic Institution, 1978-10) Orr, Marshall H. ; Hess, Frederick R.

Acoustic data, transmissometer data, and calculations are presented which indicate that high-frequency acoustic backscattering systems can become a valuable tool in the remote monitoring of suspended particle distributions and active resuspension areas. Data are also presented which show that acoustic backscattering systems can be used to remotely detect slope/shelf water frontal zones. Towed acoustic systems should be able to map the extent of the frontal zone and add significantly to the understanding of frontal zone processes.
Technical progress report : advanced marine technology 1 August 1972 - 31 January 1973

(Woods Hole Oceanographic Institution, 1973-06-01) Aldrich, Thomas C. ; Maxwell, Arthur Eugene ; Bowin, Carl O. ; Luyendyk, Bruce P. ; Phillips, Joseph D. ; Hess, Frederick R. ; Vine, Allyn C. ; Ballard, Robert D. ; Marquet, William M. ; Porter, David L. ; McCamis, Marvin J. ; Winget, Clifford L. ; von Herzen, Richard P. ; Williams, David L.

The work sponsored by ARPA at Woods Hole Oceanographic Institution is having an impact on efforts by those not directly involved in the projects both within and without the Institution. The navigation system being developed for submersible/mother ship has been recognized as a very useful system by members of the Geology/Geophysics Department and the Department of Physical Oceanography. Each department is now developing their own system based on the work already completed by the Ocean Engineering Department under the ARPA contact. Through the ARPA contract ComPhibLant (specifically ComPhibRonTen) was shown some of the advantages of doing something new about small boat and heavy object handling at sea and this program is expected to have some direct effect upon methods they will use in the future. Although the project concerned with developing biological equipment for deep sea work has not continued as part of the ARPA program, the seed was succssfully sown and several items are being developed at the Institution under separate funding. All the projects continued at a fair pace but not without some problems. The Deep Sea Rock Drill had some minor setbacks during operations with ALVIN, and the Air-Sea System (Long Range Ech-Ranging) project was hampered by a faulty engine aboard the air craft. Summaries of progress are given immediately below and more detail is available in the individual reports further on.
A shipboard cable-hauling system for large electrical cables

(Woods Hole Oceanographic Institution, 1965-02) Hess, Frederick R. ; Slabaugh, L. V.

An air -powered hauling machine and reeling device for use at sea with large electrical cable systems such as hydrophone arrays is described. The system may be used to haul cables from 0. 3 to 2 . 0 inch diameter. Hauling tensions up to 9 80 lbs . and speeds up to 4 30 ft/ min. are provided. The principal advantage of the system is that it does not cause the cable to bend while under tension. Reeling is accomplished under only sufficient tension to cause the cable to conform to the reel.
A towed, multi-frequency H.F. sonar system for scattering and ocean dynamics studies

(Woods Hole Oceanographic Institution, 1979-10) Hess, Frederick R. ; Orr, Marshall H.

The system described provides wide operational flexibility at any operating frequency from 5 kHz to over 800 kHz (except for a small band around 455 kHz) limited mainly by the availability of transducers. Variable pulse width, variable receiver bandwidth, low receiver noise, various time variable gain functions and wide system dynamic range characterized the system. Built-in time-sharing controls maximize flexibility of graphics display on either dry-paper or fibre-optic CRT recorders.

Hess Frederick R.

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