| Prototype Sparse Arrays for 3D Sonar Imaging System |
Jan-2009 |
8 pages |
| Authors:
John Impagliazzo; Steven Kay; Alice M Chiang; Steven R Broadstone; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
 | A three dimensional sonar imaging system is under development for use by Navy divers for mine-field reconnaissance and mine-hunting systems. These divers require a small, low power, lightweight acoustic imaging system with high resolution for examining and disposing of underwater ordinance. Sparse array technology is being investigated to develop a sonar requiring the minimal number of signal processing channels while maintaining the beamwidth and sidelobe structure required for high resolution ... |
|
| Roughness Spectra and Acoustic Response from a Diver-Manipulated Sea Floor |
18 SEP 2006 |
7 pages |
| Authors:
Kevin B. Briggs; Michael D. Richardson; Kevin L. Williams; Anthony P. Lyons; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS SEAFLOOR SCIENCES DIRECTORATE
|
| A digital stereo photogrammetric system was designed and implemented to measure seafloor roughness in coastal sands. High-resolution images that achieve more than four pixels/millimeter in either the horizontal or vertical dimension are created by two cameras sealed in watertight housings and actuated simultaneously by a scuba diver. A Digital Elevation Model (DEM) of the photographed sea floor is created from digital autocorrelation of left and right paired images. The DEM ... |
|
| NSMRL: A Small Command with A Huge Presence for the Submarine Force |
OCT 2005 |
14 pages |
| Authors:
J. C. Daniel; Jerry Lamb; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| "To protect the health and enhance the performance of our warfighters through focused submarine, diving and surface research solutions" is the mission of the Naval Submarine Medical Research Laboratory (NSMRL), located just a few hundred yards from the waterfront at Submarine Base New London, Groton, CT. One of 10 Navy Medicine Biomedical Research Labs around the world, it has directly supported Naval Submarine Forces since World War II. Yet, like ... |
|
| Probability of Decompression Sickness in No-Stop Air Diving |
DEC 2004 |
51 pages |
| Authors:
Hugh D. Van Liew; Edward T. Flynn; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| We produce statistics-based (probabilistic) and intuition-based (deterministic) models using dive-outcome data from the U.S. Navy Decompression Database to gain an understanding of the no-stop diving instructions used by the U.S. Navy and various other navies. The models allow estimation of probability of decompression sickness (DCS) for various bottom times for air no-stop diving. Our calibration data set contains 2.037 experimental no-stop dives with 104 cases of decompression sickness (DCS) and ... |
|
| DoD Coral Reef Protection and Management Program |
Aug-2004 |
17 pages |
| Authors:
Tom Egeland; Lorri Schwartz; Alex Viana; Steve Smith; Philip Lobel; Mindy Richlen; Lisa K Lobel; ASSISTANT SECRETARY OF THE NAVY (INSTALLATION AND ENVIRONMENT) ARLINGTON VA
|
| DoD Coral Reef Protection and Management Program (CRTF) goals are to 1) Ensure sustainable use of marine resources for DoD operations and training exercises. 2) Identify and map locations of DoD coral reef ecosystems. 3) Inventory and monitor coral resources and tropical near-shore environments. 4) Provide expertise for conducting required assessments for installation integrated natural resources management plans. 5) Provide marine ecological training for active duty DoD divers. 6) Support ... |
|
| A Comparison of In-Situ Measurements and Satellite Remote Sensing of Underwater Visibility |
MAR 2003 |
77 pages |
| Authors:
Erica A. Museler; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| SeaWiFS data converted to optical properties of the ocean in the form of vertical and horizontal underwater visibility products are compared to in- water diver and optical instrument measurements during the Model Diver Visibility (MoDiV) experiment. Results were collected from 19 to 21 August in the Mississippi Bight region of the United States. The SeaWiFS satellite data was processed with the Automated Processing System (APS), developed by the Naval Research ... |
|
| Non-Lethal Swimmer Neutralization Study |
MAY 2002 |
79 pages |
| Authors:
Karl W. Rehn; Penny K. Riggs; TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
|
| The Applied Research Laboratories, The University of Texas at Austin (ARL: UT) was tasked to study the means and equipment for non-lethal methods to deter swimmers and scuba divers from restricted areas. This work included identification and evaluation of existing technologies, as well as review of research in security, acoustics, biology, and other fields. Various technologies have been developed as non-lethal weapons for law enforcement, but most of them are ... |
|
| Physical Fitness Requirements for Explosive Ordnance Disposal Divers |
29 OCT 1998 |
24 pages |
| Authors:
J. A. Hodgdon; M. B. Beckett; T. Sopchick; W. K. Prusaczyk; H. W. Goforth Jr; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| The purpose of this study was to explore relationships between performance of EOD job tasks and physical fitness measures and to determine minimum physical fitness scores, to serve as standards for EOD personnel. Subjects were 47 active-duty EOD personnel. Mean age was 31.8 +-5.8 years; stature, 177.4 +-5.8 cm; body mass, 81.1 +-10.9 kg; and body fat content, 17.1 +-5.3%. Physical fitness attributes measured were: ... |
|
| Calculating Decompression in Naval Special Warfare SEAL Delivery VehicleDiving Operations Utilizing the Real Time Dive Planner |
NOV 1996 |
88 pages |
| Authors:
D. J. Valaik; E. C. Parker; S. S. Survanshi; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
| Currently, SEAL Delivery Vehicle (SDV) dry deck sheller (DDS) diving supervisors, in concert with their diving medical officer, have three options in calculating decompression: (1) Volumes 1 and 2 of the U.S. Navy Diving Manual, (2) CSMD procedures, and (3) the Dive Planner. For a given dive, these different methods of calculating the decompression obligation could give three very different answers. Understanding which decompression schedule is the ... |
|
| Development of a General Hearing Conservation Standard for Diving Operations: Experiment I, Comparison of Temporary Auditory Threshold Shifts Induced by Intense Tone in Air and Water |
30 SEP 96 |
27 pages |
| Authors:
Paul F. Smith; Robert Sylvester; Frances Baran; Christopher Steevens; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
|
| Preliminary hearing-conservation guidance for occupational exposure to intense waterborne sound has been developed but little supporting experimental evidence has been offered. This paper describes two attempts to experimentally determine the auditory hazard to SCUBA divers exposed to intense noise in water. This paper attempts to develop a data base upon which to establish hearing-conservation standards for Navy divers exposed to waterborne noise. |
|
| Commercially Available Performance Inc. Regulators |
APR 94 |
16 pages |
| Authors:
J. A. Noe; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| Evaluations were conducted on Performance Inc, Chapel Hill, NC, PDXL 700 and PDXL 1000 regulators, to determine which commercially available open- circuit SCUBA regulators were capable of meeting performance goal standards for Navy use. Bench testing of all candidate regulators was conducted to establish flow patterns and air delivery capacity. Unmanned testing using a breathing simulator at ventilation rates of 22.5, 40, 62.5, and 90 L/min at test depths of ... |
|
| Construction Diver Lift Systems |
MAR 93 |
40 pages |
| Authors:
Hugh G. Thomson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| A diver-operated lift system has been developed for underwater construction divers. The system consists of three different open-bottom lift bags with the following lift ranges: 200 to 550 pounds, 500 to 1,250 pounds, and 1,000 to 3,000 pounds. The system maintains a constant buoyancy during ascent by venting the expanding air volume out under the slider of a zipper, which is attached to the side of the bag along the ... |
|
| U.S. Navy Waterside Security System Technology Update |
MAR 93 |
6 pages |
| Authors:
C. A. Keeney; M. F. Walder; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| A primary WSS objective was to satisfy the U.S. Navy's operational requirement while emphasizing the use of nondevelopmental items (NDI) wherever possible to minimize development time and cost. If NDI could not satisfy established system requirements the appropriate technology would be provided through a research and development effort. Earlier testing of candidate NDI equipment revealed that existing sonars and C3D with appropriate characteristics were not available.... Security, Technology survey, Marine ... |
|
| Here Today: Ka-Band Munition Transceivers. |
SEP 1986 |
|
| Authors:
T. N. Trinh; E. BENKO; W. S. Wong; HUGHES AIRCRAFT CO TORRANCE CA MICROWAVE PRODUCTS DIV
|
 | Expendable millimeter-wave transceivers must be produced economically at a high volume if they are to be of practical use in radar-guided anti-armor missiles or target-activated munitions. Additional requirements such as small size, reliability, and high power follow right behind producibility and low cost, especially for military systems. (Author. Copyright 1986 Hayden Publishing Company, Inc.) |
|
| Central Nervous System Oxygen Toxicity in Closed-Circuit Scuba Divers III |
MAR 86 |
54 pages |
| Authors:
F. K. Butler Jr; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| The U.S. Navy is currently interested in expanding its closed-circuit oxygen diving capabilities. Previous dive series at NEDU in 1982 and 1983 resulted in significant extensions of the oxygen exposure limits and the development of the transit/excursion concept in which a single excursion below 20 FSW is allowed during a four hour exposure providing the rest of the the dive is spent at 20 FSW or shallower. This series was ... |
|
| Consequences of U.S. Navy Diving Mishaps: Air Embolism and Barotrauma |
DEC 85 |
|
| Authors:
Anne Hoiberg; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Pulmonary barotrauma and air embolism have been reported to be second only to drowning as the leading causes of death among sport and scuba divers. Barotraumas and air embolisms accounted for 21.9% and 3.6%, respectively, of all U.S. Navy diving mishaps recorded from 1968 through 1981. The purpose of this longitudinal study was to examine the short- and long-term health effects of an air embolism (n=27) or barotrauma (n=138) during ... |
|
| Manned Testing of Two Closed-Circuit Oxygen Underwater Breathing Apparatus: U.S. Navy Emerson Rig and Fenzy PO.68 |
SEP 1984 |
|
| Authors:
H. J. C. Schwartz; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| The breathing characteristics of two types of closed circuit oxygen Self-Contained Underwater Breathing Apparatus (SCUBA), at a pressure equivalent to 30 feet of sea water were studied in the Ocean Simulation Facility of the Navy Experimental Diving Unit. Breath-by-breath curves of inhaled and exhaled oxygen and carbon dioxide levels and inspiratory/expiratory pressure curves were recorded. For the first type, the U.S. Navy Recirculating Underwater Breathing Apparatus, Closed-Circuit, Oxygen (Emerson Rig), ... |
|
| Technical Resources of Frogmen of Capitalist Navies (Technische mittel der Kampf-Schwimmer der Seestreitkrafte Kapitalistischer Staaten) |
13 DEC 1983 |
9 pages |
| Authors:
J. Haferberger; NAVAL INTELLIGENCE SUPPORT CENTER WASHINGTON DC TRANSLATION DIV
|
|
| MK 16 Deployment Procedures |
JUL 1983 |
|
| Authors:
K. W. Wright; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| The Navy Experimental Diving Unit conducted manned open water testing to evaluate deployment procedures for mixed gas self contained underwater breathing apparatus (SCUBA: MK 16 MOD O UBA) in June 1983. In water decompressiion was conducted day and night in ambient water temperature ranges of 58 to 70 F. The new procedures proved fully compatible with in-service U.S. Navy equipment. In addition, the procedures were used to deploy self contained ... |
|
| Development of a Helium/Carbon Dioxide/Hydrogen Sensor System for SCUBA |
16 AUG 1982 |
|
| Authors:
Kuo Wei Chang; Sanlu Chang; INDUSTRIAL AND BIOMEDICAL SENSORS CORP WALTHAM MA
|
| The feasibility of a Helium/Carbon Dioxide/Hydrogen sensor system for SCUBA diving has been investigated. The helium sensor is a piezoelectrically excited diaphragm with its acoustic characteristics related to the helium concentration. The carbon dioxide sensor is an enzymatic/electrolyte anion exchange cell operating in a diffusion controlled mode, where the cell current is proportional to the partial pressure of CO2. The hydrogen sensor is a hydrogen/oxygen fuel cell operating in the ... |
|
| Salvage of a USAF F-106 DELTA DART |
JUL 1981 |
|
| Authors:
Colin A. Kidman; R. A. Bornholdt; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| As formally requested by the U.S. Air Force and under the official direction of the Chief of Naval Operations, the Navy Experimental Diving Units (NEDU) directed the search, location and recovery of an F-106 DELTA DART which had crashed into the Gulf of Mexico in 80 FSW. The operation covered a span of 20 days. NEDU was assisted in the salvage effort at various times by local units from the ... |
|
| Analysis of Decompression Tables Calculated by Non-U.S. Navy Methods, |
31 MAR 1980 |
|
| Authors:
Peter O. Edel; SEA-SPACE RESEARCH CO INC HARVEY LA
|
| A total of 336 depth-time combinations of air decompression tables selected from U. S. Navy and British schedules were individually analyzed by a computer using the AUTODEC system. In addition 97 schedules tested by the Experimental Diving Unit in the development of Mixed Gas Scuba tables were analyzed to compare the computer analysis with manned test data. (Author) |
|
| Evaluation of Commercially Available Buoyancy Compensators. |
MAR 1980 |
|
| Authors:
James R. Middleton; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| The Navy Experimental Diving Unit evaluated methods of inflation and performance characteristics of fourteen commercially available buoyancy compensators for use with standard scuba. As a result of manned and unmanned testing, five buoyancy compensators were found to be preferred for use by Navy divers. (Author) |
|
| A Doppler Ultrasonic Data Bank for Diver Decompression Analysis, |
AUG 1979 |
|
| Authors:
K. E. Kisman ; G. Masurel ; R. Guillerm; DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)
|
| A data bank for Doppler ultrasonic bubble flow data obtained during and following decompression of divers has been established for the purpose of data storage and subsequent computer analysis. Each dive is characterized by 52 parameters selected for future computer correlation studies. For each of 12 of the parameters, a table has been provided into which entries may be made as the data bank grows. Data are entered into the ... |
|
| Diving Induced Deafness. |
JUL 1978 |
|
| Authors:
James G. McCormick; BOWMAN GRAY SCHOOL OF MEDICINE WINSTON-SALEM N C
|
| Diving deafness and vestibular disorder can be the result of barotrauma and/or decompression sickness. Inner ear sensory hair cells are damaged with diving deafness. Also the inner ear microcirculation can be involved in the pathology. Formation of inner ear perilymph gas bubbles may also explain certain cases of diving deafness. Inner ear decompression sickness pathology is probably mediated in part through the abnormal stimulation of intravascular clotting. (Author) |
|
| First Article Acceptance Portable Recompression System Dixie Manufacturing Company. |
1976 |
|
| Authors:
J. N. Mares; R. H. Fine; D. B. Hartman; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FLA
|
| The one man portable recompression system covered in this report is the first article developed for the U.S. Navy by Dixie Manufacturing Company. A prototype of this unit built by Battelle Memorial Institute was previously tested at the Navy Experimental Diving Unit and the results promulgated in NAVXDIVINGU Report 1-74 of 16 January 1974. It is not the intent of this test to repeat all aspects of that technical evaluation ... |
|
| Theories of Learning and the Teaching of Diving. |
1976 |
|
| Authors:
Arthur J. Bachrach; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
| Learning has generally been considered as a change in behavior potential and performance as the observable realization of this potential. The role of practice and reinforcement has also been delineated, the latter in particular in regard to the reacquisition of the skills involved in the behavior potential and eventual performance. Learning has thus been defined as a change in behavior potential resulting from reinforced practice. In many situations, the applications ... |
|
| Evaluation of the Draeger LAR V Pure Oxygen Scuba |
08 OCT 1975 |
44 pages |
| Authors:
Howard N. Paulsen; Ronald E. Jarvi; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| The Draeger LAR V scuba is a pure oxygen self contained underwater breathing apparatus designed and manufactured in the Federal Repbulic of Germany. The scuba is completely closed circuit and incorporates a demand type oxygen supply. Gas purification is accomplished by means of a refillable CO2 absorbant cansiter. The LAR V works on pure oxygen. This evaluation was conducted to determine safe operational capabilities and limitations of the LAR V ... |
|
| Comparison of Biochemical Responses Between Single and Repeated Exposures to Air at 6.7 ATA. |
04 JUN 1975 |
|
| Authors:
E. Heyder; M. J. Jacey; D. V. Tappan; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| U.S. Navy diver volunteers were subjected to short (45-minute) exposures to air at 6.7 ATA. The experimental protocol was designed to compare the recoveries from single exposures with those from similar dives employing 3-day inter-dive intervals. Serum and 24-hour urine samples were collected for 5 days prior to and for 7 and 10 respectively after the dives. Serum and urinary minerals, electrolytes, and protein metabolites as well as serum enzymes ... |
|
| Visual Evoked Responses and EEGS for Divers Breathing Hyperbaric Air: An Assessment of Individual Differences, |
03 JUN 1975 |
|
| Authors:
Jo Ann S. Kinney; Christine L. McKay; S. M. Luria; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| In order to assess individual differences in susceptibility to nitrogen narcosis, a group of 16 men made repeated air dives to approximately 200 ft in a pressure chamber. The visual evoked response of the men at depth revealed several decrements: in the response to a slow rate of stimulation, there was a highly significant reduction in a component around 160 msec; in the response to a rapid rate of stimulation, ... |
|
| Underwater Communications System for Use by Free Swimming Divers. |
JUN 1975 |
|
| Authors:
David Campbell Steere; NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
|
| The need for a compact, reliable, and inexpensive communications system for untethered SCUBA divers is pointed out as being acute. An investigation into various characteristics of the undersea medium leads to the choice of a 40 kHz acoustic carrier, frequency modulated by plain voice, as the optimal approach. Investigations into microphone, earphone, and physiological problems encountered in the diver's environment are reported. A communication system, given the acronym DUCS-I (Diver's ... |
|
| Evaluation of Healthways Contour SCUBAPAC. |
1975 |
|
| Authors:
Thomas W. Cetta; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FLA
|
| Healthways Corporation submitted a contour backpack No. 1450 for evaluation by the Navy Experimental Diving Unit. The pack was submitted for possible approval and placement on the Navy Approved Products List in NAVSEA INSTRUCTION 9940.21A. The Healthways Contour Backpack Nr. 1450 performed favorably as tested and is recommended for placement on NAVSEA INSTRUCTION 9940.21A. (Author) |
|
| Carbon Dioxide Effects under Conditions of Raised Environmental Pressure. |
26 DEC 1974 |
|
| Authors:
K. E. Schaefer; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| Exposure to the increased barometric pressure, such as encountered under water, affects the mechanics of respiration and in particular the behavior of respiratory gases. Carbon dioxide plays a major role in the physiology of the high-pressure environment since increased breathing resistance easily leads to carbon dioxide retention, as has frequently been noted in scuba and helmet diving. Pulmonary gas exchange in breathhold diving is influenced by the compression and decompression ... |
|
| Evaluation of U. S. Diver's Co. Modified Conshelf VI and Conshelf XI Conversion to Conshelf XII Open Circuit Regulators, |
09 JUL 1973 |
|
| Authors:
T. W. Cetta; NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
|
| The U. S. Diver's Conshelf VI was tested by the Experimental Diving Unit in 1963, in February 1973 for service use. In 1972 the Conshelf XII was tested by the Navy Experimental Diving Unit and in October 1972 was approved for service use. In 1971, the Conshelf XI superceded the Conshelf VI. The Conshelf XI was never submitted for testing hence never approved. At the present time, only the Conshelf ... |
|
| Smoke Detection in Hyperbaric Chambers - An Experimental Study. |
JUL 1973 |
|
| Authors:
T. T. Fu; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The feasibility of smoke detection for manned hyperbaric chambers by measuring the total hydrocarbon content in the chamber gas and by water condensation on smoke particles was studied. A Beckman 400 hydrocarbon analyzer and an Environment/One incipient fire detector were used for this study. Tests were conducted during a typical 1000 fsw dive at the Navy Experimental Diving Unit and with simulated dives in both compressed air and helium to ... |
|
| The Ear and Hearing in the Aquatic and Dysbaric Environments. |
29 MAY 1973 |
|
| Authors:
J. Donald Harris; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| A non-quantitative theory of human hearing is sketeched for the case of the head immersed in water, based upon what is known of hearing in air and hearing by bone conduction. A consideration is given of four routes by which acoustic waterborne energy is transmitted to the fluids of the inner ear. Quantitative data are presented from recent studies of the thresholds of underwater auditory acuity, and of the relations ... |
|
| A Self-Contained Load-Handling Pontoon. |
MAY 1973 |
|
| Authors:
Kenneth J. Conda; F. W. Armstrong Jr; NAVAL MEDICAL RESEARCH INST BETHESDA MD
|
| To increase diver safety, endurance, and performance, and to measure dive work in assembly projects, a self-contained load-handling pontoon was developed. The pontoon is light and small enough for one man to handle, yet big enough to carry a good pay-load. It enables a diver to lift a heavy object, move it from point 'A' to point 'B' in complete safety, and to control the object's up-and-down movement within a ... |
|
| Heat and Mass Transfer in the Human Respiratory Tract at Hyperbaric Pressures. |
MAY 1973 |
|
| Authors:
L. Sigfred Linderoth Jr.; Ernest A. Kuonen; DUKE UNIV DURHAM N C SCHOOL OF ENGINEERING
|
| The primary objective of this study is to model the simultaneous heat and momentum transfer in the lower respiratory tract. Experimental velocity and temperature profiles are presented in two and three dimensional format. A computer program to calculate gas transport properties for any gas mixture at any pressure was developed. Methods to measure humidity at depth are also discussed. The respiratory heat loss of a diver working at 1000+ feet ... |
|
| Standardization of Speech Materials for Underwater Research 1: Comparative Intelligibility of Monosyllabic Word Lists. |
01 SEP 1972 |
|
| Authors:
Robert F. Coleman; Harry Hollien; FLORIDA UNIV GAINESVILLE COMMUNICATION SCIENCES LAB
|
| Two experiments are reported in which the underwater intelligibility scores of four standard word lists were compared. As would be expected, closed-set word lists produced higher scores than did open-ended tests. Alternate forms of two tests were compared and the results indicated that lists which are 'equated for difficulty' in normal environments also are reasonably equated underwater. A preliminary analysis of phoneme type distortion was derived from one closed-set test. ... |
|
| Improving Distance Estimation Under Water: Long-Term Effectiveness of Training. |
10 JUL 1972 |
|
| Authors:
Steven H. Ferris; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| Due to both optical distortion and water turbidity, divers are usually inaccurate when they estimate distances under water. Previous studies have demonstrated that training with feedback improves judgment accuracy. The present study showed that the effect of training diminishes considerably during the nine weeks following training. A more extensive training program is recommended for diving tasks in which distance estimation is important. (Author) |
|
| Human Factors Guide for the Design of Diver-Operated Hand and Power Tools. |
JUL 1972 |
149 pages |
| Authors:
Birger G. Andersen; WHITTENBURG VAUGHAN ASSOCIATES INC LANDOVER MD OCEANAUTICS DIV
|
| The report describes the results of a research study directed toward expanding the available data base of man's ability to work underwater, by providing human factors data on man's requirements and capabilities as an undersea worker. The report is a basic human factors criteria guide for the design of diver-operated tools and work systems. Data included were developed and compiled through evaluation of operational diver work tasks, in-the-field observation of ... |
|
| The Ecology and Distribution of Rock-Boring Pelecypods off Del Monte Beach, Monterey, California. |
JUN 1972 |
|
| Authors:
Gregory Seeley Booth; NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
|
| Divers using SCUBA gear gathered and identified rock-boring pelecypods found in the subtidal outcrops of Monterey silicious shale off Del Monte Beach, Monterey, California. Underwater photographs were taken of all the recognizable species present. A species distribution and mapping survey was made along two transects, one of which would be subjected to radical ecological change after isolation from the open sea by a proposed breakwater project. Most species found are ... |
|
| Design Considerations for a Microphone-Equipped Mouthpiece for Navy Diver Communication. |
14 JAN 1972 |
10 pages |
| Authors:
Joseph S. Russotti; Russell L. Sergeant; NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN
|
| The paper presents design considerations of a microphone-equipped breathing mouthpiece for enhanced underwater swimmer communications. Toward this objective, emphasis was placed upon providing increased freedom for aritculatory movement as well as a larger 'speaking' cavity for less restriction to the speech flow while maintaining protection from the dangers of CO2 build-up in the breathing mixture. (Author) |
|
| Annotated Bibliography on Underwater Communication. |
01 DEC 1971 |
|
| Authors:
Patti Paul Hollien; Harry Hollien; Howard B. Rothman; Stephen H. Feinstein; FLORIDA UNIV GAINESVILLE COMMUNICATION SCIENCES LAB
|
| The entire report is provided as a service to workers investigating or interested in diver communication. Toward this purpose it attempts to provide a reasonably complete list of annotated references in this area. (Author) |
|
| Technical Evaluation of Diver-Held Power Tools. |
JUN 1971 |
60 pages |
| Authors:
S. A. Black; F. B. Barrett; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
|
| Pneumatic and hydraulic hand-held power tools were evaluated by divers performing realistic underwater tasks. These tasks included drilling steel and aluminum, nut running and tightening, grinding metal, and chain sawing wood. An on-the-site observer monitored diver performance time for each task. Diver skill in effective tool utilization is very important in working underwater. At test depths to 60 feet, hydraulic tools were very effective and practical, while pneumatic tools, although ... |
|
| Breathing Characteristics Study. |
20 APR 1971 |
|
| Authors:
D. Martin Harrell; WESTINGHOUSE ELECTRIC CORP ANNAPOLIS MD OCEAN RESEARCH AND ENGINEERING CENTER
|
| The report describes the evaluation of a technique for measuring the respiratory characteristics of underwater breathing apparatus using a mechanical breathing machine. The technique considered was one used successfully at Yale University to examine the respiratory response of guinea pigs to drugs. Using it, breathing resistance, compliance, and time constant are computed in real time from continuous measurements of tidal volume, air flow rate, and pleural pressure. This technique was ... |
|
| Computer Generated Depth-Pressure Conversion Tables. |
01 APR 1971 |
|
| Authors:
Thomas E. Berghage; Hugh T. Beatty; NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
|
| The tables are needed to provide a simplified method for converting depth in feet of sea water to other depth and pressure units. A computer program was written for the calculation and printing of selected depth and pressure units from 0 to 2999 feet of sea water. Conversion tables presented are depth in feet of sea water, depth in meters, depth in fathoms, atmospheres absolute, pounds per square inch absolute, ... |
|
| Underwater Sound Localization in Humans. |
01 MAR 1971 |
20 pages |
| Authors:
Harry Hollien; Howard Rothman; FLORIDA UNIV GAINESVILLE COMMUNICATION SCIENCES LAB
|
| Theory and some empirical evidence are cited which predict that humans should exhibit little or no ability to localize sounds underwater; however, other evidence is presented also which seems to contradict this position. In order to provide relevant data on the issue, a pilot study was conducted with results suggesting that man can localize sounds underwater--at least to some degree. Accordingly, a series of experiments were carried out; the first ... |
|
| Evaluation of U. S. Diver's Calypso III, Calypso J, Conshelf XII, Aquarius, and Royal Aquamaster Open Circuit Scuba Regulators. |
1971 |
|
| Authors:
T. W. Cetta; NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
|
| The military specifications for open circuit SCUBA regulators provide a mechanism by which commercial vendors may submit their regulators to the Navy Experimental Diving Unit for testing for possible approval for U.S. Navy use. Accordingly, U.S. Diver's single hose regulators Calypso III, Calypso J, Conshelf XII and Aquarius and double hose regulator Royal Aquamaster were tested in September 1972. Due to the non availability of government test chambers, the regulators ... |
|
| Report of Experimental Dives for SEALAB III Surface Support Decompression Schedules. |
01 DEC 1970 |
120 pages |
| Authors:
Richard W. Crowley; James K. Summitt; NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
|
| The report describes the decompression schedules that were developed and tested by the U.S. Navy Experimental Diving Unit (NAVXDIVINGU) in preparation for SEALAB III. The need was foreseen for a surface supported diving capability for underwater tasks of relatively short duration which would not necessitate the use of saturation diving with its resulting long decompression times. The decompression schedules described in the report were designed to provide that capability. The ... |
|
Reports by Keyword(s)
SCUBA DIVERS
