Bubbles from a Snag Diver
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A Field Study of the Ventilatory Response to Ambient Temperature and Pressure in Sport Diving
Br. J. Sports Med., Vol. 29, No. 3, pp. 185-190, 1995 nE I N E M A N N Copyright (C 1995 Elsevier Science Ltd Printed in Great Britain. All rights reserved 0306-3674/95 $10.00 + 00 Br J Sports Med: first published as 10.1136/bjsm.29.3.185 on 1 September 1995. Downloaded from A field study of the ventilatory response to ambient temperature and pressure in sport diving F L L Muller Department of Oceanography, The University, Southampton, UK This study reports on the relationship between minute The 'environmental conditions' simulated in most ventilation (VE) and environmental variables of temperature laboratory studies may be of limited relevance to sport (T) and pressure (P) during open water diving. The author on the effects of conducted a total of 38 dives involving either a light (20 diving. Experiments focusing pressure dives) or a moderate (18 dives) level of physical activity. have usually been performed within a compression Within each of these groups, P and T taken together chamber, with the subject either lying down3 or sitting accounted for about two thirds of the variance in the VE on a chair or bicycle ergometer.47 Likewise, the effects data. A very significant increase in VE was observed as T of water temperature on respiratory variables have been decreased (1 < T(0C) < 22), and the magnitude of this investigated in relatively small tanks in which the increase at a given pressure level was similar in the 'light' subject was immersed up to the shoulders."'0 Changes and the 'moderate' data sets. -
History of Scuba Diving About 500 BC: (Informa on Originally From
History of Scuba Diving nature", that would have taken advantage of this technique to sink ships and even commit murders. Some drawings, however, showed different kinds of snorkels and an air tank (to be carried on the breast) that presumably should have no external connecons. Other drawings showed a complete immersion kit, with a plunger suit which included a sort of About 500 BC: (Informaon originally from mask with a box for air. The project was so Herodotus): During a naval campaign the detailed that it included a urine collector, too. Greek Scyllis was taken aboard ship as prisoner by the Persian King Xerxes I. When Scyllis learned that Xerxes was to aack a Greek flolla, he seized a knife and jumped overboard. The Persians could not find him in the water and presumed he had drowned. Scyllis surfaced at night and made his way among all the ships in Xerxes's fleet, cung each ship loose from its moorings; he used a hollow reed as snorkel to remain unobserved. Then he swam nine miles (15 kilometers) to rejoin the Greeks off Cape Artemisium. 15th century: Leonardo da Vinci made the first known menon of air tanks in Italy: he 1772: Sieur Freminet tried to build a scuba wrote in his Atlanc Codex (Biblioteca device out of a barrel, but died from lack of Ambrosiana, Milan) that systems were used oxygen aer 20 minutes, as he merely at that me to arficially breathe under recycled the exhaled air untreated. water, but he did not explain them in detail due to what he described as "bad human 1776: David Brushnell invented the Turtle, first submarine to aack another ship. -
Estimating Your Air Consumption
10/29/2019 Alert Diver | Estimating Your Air Consumption Estimating Your Air Consumption Advanced Diving Public Safety Diving By Mike Ange Mastering Neutral Buoyancy and Trim Military Diving Technical Diving Scientific Diving and Safety Program Oversight Seeing the Reef in a New Light ADVERTISEMENT Do you have enough breathing gas to complete the next dive? Here's how to find out. It is a warm clear day, and the Atlantic Ocean is like glass. As you drop into the water for a dive on North Carolina's famous U-352 wreck, you can see that the :: captain has hooked the wreck very near the stern. It is your plan to circumnavigate the entire structure and get that perfect photograph near the exposed bow torpedo tube. You descend to slightly below 100 feet, reach the structure and take off toward the bow. Unfortunately, you are only halfway, just approaching the conning tower, when your buddy signals that he is running low on air. Putting safety first, you return with him to the ascent line — cursing the lost opportunity and vowing to find a new buddy. If you've ever experienced the disappointment of ending a dive too soon for lack of breathing gas or, worse, had to make a hurried ascent because you ran out of air, it may surprise you to learn that your predicament was entirely predictable. With a little planning and some basic calculations, you can estimate how much breathing gas you will need to complete a dive and then take steps to ensure an adequate supply. It's a process that technical divers live by and one that can also be applied to basic open-water diving. -
Diving Rules at the University of Gothenburg
University of Gothenburg Regulatory document Dnr V 2013/511 Diving rules at the University of Gothenburg Published Medarbetarportalen.gu.se/Regulatory document Decision makers Vice-chancellor Manager function Personnel unit Decision date 2013-06-17 Validity until further notice Summary Rules for diving work at the University of Gothenburg responsibilities and organization as well as rules for systematic work environment management for diving activities Translated from the original in Swedish language by staff at the Marine Infrastructure-Kristineberg, Uni of Gothenburg, without any warrantee for correctness). Contents 1 General 1.1 Regulations and literature 1.2 All diving is voluntary 1.3 Exemption from diving rules 2 Validity of the regulations 2.1 Swedish visiting divers 2.2 Foreign visiting divers 3 Working environment responsibility 4 Diving activities leader 5 Regulations for diving and diving methods 5.1 Diving with hyperbaric shelf-contained underwater breathing apparatus (SCUBA) 5.1.1 Competence requirements 5.1.2 Medical examination etc. 5.1.3 Training in cardiopulmonary resuscitation (CPR-training) 5.1.4 Air transport after diving 5.1.5 Diving at altitude 5.1.6 Alcohol consumption 5.1.7 Certified equipment 5.1.8 Personal protective equipment 5.1.9 Maintenance of equipment 5.1.10 Diving air quality 5.1.11 Maintenance of skills 5.2 Snorkeling and free diving 6 Documentation 6.1 Common register for the University of Gothenburg 6.1.1 Records of medical examinations, CPR-training, diving competence etc. 6.1.2 Records of diving (diving journals) 6.2 Local records save on the currents drive 6.2.1 Inspection/service of dive equipment 6.2.2 Risk assessment and measures 6.2.3 Diving plan 6.3 Personal register 6.3.1 Personal diving book 6.4 Other registers 6.4.1 Reporting of work injuries, incidents and deviations in diving work 7 Leisure/recreational diving 7.1 SCUBA-diving 7.2 Snorkeling and free diving 1 General The vice-chancellor decided at a meeting at the 17th of June 2013 to established rules for diving at the University of Gothenburg. -
How Does the Diver Work? Preparing the Plastic Soda Bottle
How Does the Diver Work? Preparing the Plastic Soda Bottle Vv'hen you build a Cartesian diver, you are exploring three scientific properties of air: You will need to start collecting plastic soda bottles with caps. While (1) Air has weight almost any size bottle will work, the most popular sizes are 1 liter, 1.5 liter, and 2 liter bottles. Smaller children will find that the 1 and 1.5 liter (2) Air occupies space bottles are easiest to squeeze. The best soda bottles are those that are (3) Air exerts pressure. clear from top to bottom so that you can see everything that is happening in the bottle. Generally speaking, an object will float in a fluid if its density is less than that of the fluid (densltyemass/volume). If the object is more dense than the fluid, then the object will sink. For example, an empty bottle will float in a bathtub that is filled with water if the bottle is less dense than the water. However, as you start filling the bottle with water, its Here's an easy method for density increases and its buoyancy decreases. Eventually, the bottle will sink if it is filled too full with water. ~ cleaning the plastic The Cartesian diver, consisting of a plastic medicine dropper and soda bottles: a metal hex nut, will float or sink in the bottle of water depending on the water level in the bulb of the dropper. Vv'hen pressure is applied to the outside of the bottle, water is pushed up inside the diver, and the air • Rinse out the bottle using warm water. -
The 94 Lusitania Expedition— Seductive Or Suicidal?
The 1994 Lusitania Expedition led by British Did you speak with Polly as well? FORUM: wrecker Polly Tapson (aquaCORPS Journal H: Later on. I decided then and there that this N9) was the source of considerable contro expedition needed to be really seen for what it was. That if it was left as the “leading example of techni versy at the 95 tek.CONFERENCE, following an cal diving,” there would be all hell to pay in the form evening show presentation by author and of future fatalities and injuries. I decided to seek out expedition member Gary Gentile. Though the The 94 Polly and other involved expedition divers. The dive team, consisting of eight Brits and four more I dug, the more clear it became to me that this Lusitania Americans, conducted 120 dives on the wreck expedition should never have taken place and, fur over a ten day period without incident, sever ther, should never have been publicized by Expedition— al tek participants, including Cai-Dive and aquaCORPS or given a platform at tek.95. The Oceaneering founder, Lad Handelman, publi whole thing made me kind of sick. Seductive or cally challenged the operation as being unsafe. Gentile: I think in one regard, Lad is seriously This Forum presents some of the discussion concerned, but the reason for his concern is his that has ensued. The participants— lack of understanding. He just doesn’t know that Suicidal? Handelman, Gentile, and Tapson—were inter this is the way things are done [in the technical div viewed separately by phone and the results ing field]. -
Plymouth Shipwrecks Commercial Diving in Spain
INTERNATIONAL DIVING SCHOOLS ASSOCIATION EDITION NO.26 JULY 2015 PLYMOUTH SHIPWRECKS COMMERCIAL DIVING IN SPAIN DEVELOPMENTS IN SICILIAN LAW THE ANNUAL MEETING Cygnus DIVE Underwater Wrist-Mountable Ultrasonic Thickness Gauge Wrist-mountable Large bright AMOLED display Measures through coatings On-board data logging capability Topside monitoring with measurements video overlayed Twin crystal probe option for extreme corrosion and anchor chains t: +44 (0)1305 265533 e: [email protected] w: www.cygnus-instruments.com Page 3 FROM THE Editors: Alan Bax and Jill Williams CHAIRMAN Art Editor: Michael Norriss International Diving Schools Association 47 Faubourg de la Madeleine 56140 MALESTROIT FRANCE Phone: +33 (0)2 9773 7261 e-mail: [email protected] web: Dear Members www.idsaworldwide.org F irst may I welcome the Aegean Diving Services as an Associate Member. Another year has gone by, and we are again looking at the Annual Meeting, this year teaching Level 1 and increased in Cork where our hosts – the through Level 2, 3 & 4 ? Irish Naval Diving Section – are offering a very warm welcome, ••Obtaining an ISO Approval both professionally and socially. ••Liaison with other organisa- It looks to be an interesting tions meeting and currently the Board Several of these items might is considering the following items affect the future shape and for the Agenda: operations of the Association, A Commercial Diving Instruc- •• therefore we would very much like tor Qualification to receive comments on these ••The need for an IDSA Diver items, fresh suggestions will be Training Manual most welcome, as will ideas for ••The revision of the Level 2 presentations - I am sure many Standard to include the use of members to know that Rory mixed gases in Inland /Inshore Golden has agreed to recount his Operations. -
And Financial Implications of Unmanned
Disruptive Innovation and Naval Power: Strategic and Financial Implications of Unmanned Underwater Vehicles (UUVs) and Long-term Underwater Power Sources MASSACHUsf TTT IMef0hrE OF TECHNOLOGY by Richard Winston Larson MAY 0 8 201 S.B. Engineering LIBRARIES Massachusetts Institute of Technology, 2012 Submitted to the Department of Mechanical Engineering in partial fulfillment of the requirements for the degree of Master of Science in Mechanical Engineering at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY February 2014 © Massachusetts Institute of Technology 2014. All rights reserved. 2) Author Dep.atment of Mechanical Engineering nuaryL5.,3014 Certified by.... Y Douglas P. Hart Professor of Mechanical Engineering Tbesis Supervisor A ccepted by ....................... ........ David E. Hardt Ralph E. and Eloise F. Cross Professor of Mechanical Engineering 2 Disruptive Innovation and Naval Power: Strategic and Financial Implications of Unmanned Underwater Vehicles (UUVs) and Long-term Underwater Power Sources by Richard Winston Larson Submitted to the Department of Mechanical Engineering on January 15, 2014, in partial fulfillment of the requirements for the degree of Master of Science in Mechanical Engineering Abstract The naval warfare environment is rapidly changing. The U.S. Navy is adapting by continuing its blue-water dominance while simultaneously building brown-water ca- pabilities. Unmanned systems, such as unmanned airborne drones, are proving piv- otal in facing new battlefield challenges. Unmanned underwater vehicles (UUVs) are emerging as the Navy's seaborne equivalent of the Air Force's drones. Representing a low-end disruptive technology relative to traditional shipborne operations, UUVs are becoming capable of taking on increasingly complex roles, tipping the scales of battlefield entropy. They improve mission outcomes and operate for a fraction of the cost of traditional operations. -
Darling Marine Center Local Shore Diving Guide
Darling Marine Center Local Shore Diving Guide University of Maine Scientific Diving Program Table of Contents Recommended Equipment List……………………………………………………………..2 Local Information…………………………………………………………………………...3 Recompression Chambers…………………………………………………………………..3 General Emergency Action Plan…………………………………………………………….3-4 Documentation……………………………………………………………………………….4 Dive Sites DMC Pier……………………………………………………………………………5-6 Kresge Point………………………………………………………………………….7-8 Lowes Cove Mooring Field…………………………………………………………..9-10 Pemaquid Point……………………………………………………………………….11-12 Rachel Carson Preserve………………………………………………………………13-15 Sand Cove…………………………………………………………………………….16-17 Thread of life…………………………………………………………………………18-19 Appendix………………………………………………………………………………………20 1 Recommended Equipment List • Dive flag • DAN oxygen and first aid kit • Spare tank • Extra weights • Save-a-dive kit • Dive slate/underwater paper (recording purposes) Recommended Personal Equipment • Exposure suit- minimum7mm wetsuit o Booties o Gloves o Hood o Wool socks • Fins • BCD • Mask, Snorkel • Weights • Surface marker buoy • Dive watch • Dive computer • Knife/cutting tool 2 Local Information: Fire, Medical, Police 911 Emergency Dispatch Lincoln County Emergency (207)563-3200 Center Nearest Hospital Lincoln Health-Miles (207)563-1234 Campus USCG Boothbay (207)633-2661 Divers Alert Network Emergency hotline 1-919-684-9111 Medical information 1-919-684-2948 Diving Safety Officer Christopher Rigaud (207)563-8273 Recompression Chambers: In the event of a diving accident, call 911 and facilitate transport of victim to a hospital or medical facility. The medical staff will determine whether hyperbaric treatment is needed. St. Mary’s Regional Lewiston, ME (207)777-8331 Will NOT accept Medical Center divers after 4:30pm St. Joseph’s Hospital Bangor, ME (207)262-1550 Typically, available after hours Wound and Beverly, MA (978)921-1210 Hyperbaric Medicine Basic Emergency Information: See Appendix for the approved Emergency Action Plan by the UMaine DCB. -
Sport Diving Guide 2013
WWW.WHITESDIVING.COM WHITES SPORT diving GUIDE 2013 Tired of diving cold and weT? looking for The warmTh and comforT of your firsT drysuiT? Or are you an experienced Drysuit diver seeking the legendary flexibility and streamlining of the Whites Fusion? Either way, the Whites Fusion PLUS program is for you! At a Fusion PLUS Center you can take the Fusion Distinctive Specialty Course and learn about the unique skills required to diving the Fusion Drysuit. Plus, earn your Fusion Specialty Certification at a Fusion PLUS Center and receive $200 off the retail price of your own Fusion Drysuit package within 6 months of certification. To find a Fusion PLUS Center and save $200 on your purchase visit: http://www.whitesdiving.com/fusionplus sTay dry. sTay warm. sTay diving. $ TOWARDS THE PURCHASE 200 OF ANY DRYSUIT PACKAGE WITHIN 6 MONThs OF crediT CERTIFICATION. ON US. WWW.WHITESDIVING.COM 2 FUSION TECHNOLOGY THE 2 LAYER DRYCORE ADVANTAge No other dry suit in the world can match the mobility of the Fusion. The internal loose cut DryCORE is held in place by the independent outer stretch skin providing unrestricted movement in your arms, legs, and torso. DRYCORE Oversized inner DryCORE constructed of military grade, 210 denier bi-laminate, integrates the dry zipper and seals, fits a wide size range, and does not restrict movement. EXTERNAL SKin Durable, replaceable exterior skin protects and compresses the DryCORE but does not restrict movement. Drycore technology provides 7 uniQUE BENEFITS THAT no other dry suit CAN MATCH 1. Flexibility - OVERSIZED inner DryCORE combined with the stretchy outer skin allows unrivaled mobility. -
Water Covers 70 Percent of the Earth. Scuba Diving Allows You to See What You’Re Missing
Department ADVENTURE Water covers 70 percent of the Earth. Scuba diving allows you to see what you’re missing. by AMANDA CASTLEMAN Somersault off the boat, into the deep blue. Drift down to the wreck or the reef. Or maybe towards some rock formations, sculpted long before a cavern flooded. The slightest kick sends your shadow gliding across the bottom. A whisper of breath buoys you up, chasing a flash of color. Immersed, you hover, freed from the gravity and worries of the noisy surface. Diving is as close as most of us will ever come to a spacewalk. But passion for the underwater world traces back much further than the first moon landing. Ancient Greeks held their breath to plunge Gran Cenote, Riviera for pearls and sponges—and legend claims one Maya, Mexico. breathed through a reed while he cut the moorings of the Persian fleet. Alexander the Great also descended beneath the waves in a glass barrel at the siege of Tyre, according to Aristotle. w Stills + Motion/Christian Vizl; (facing) Getty Images/Alastair Pollock Photography. Photos: Tandem 2 Summer 2014 Summer 2014 3 The desire to explore runs deep. By the 16th Giant ray. century, diving bells pumped air to adventurers and leather suits protected them to depths of 60 feet. Three hundred years later, technology leapt forward as scientists discovered the effects of water pressure and breathing compressed air. The U.S. military pioneered scuba (Self-Contained Underwater Breathing Apparatus) in 1939, then Émile Gagnan and Jacques-Yves Cousteau took the idea mainstream with their 1943 “Aqua-Lung.” Earth’s final frontier, the mysterious wine-dark sea, was open for business. -
Aqua Safari and Living Underwater, Cozumel +
The Private, Exclusive Guide for Serious Divers June 2015 Vol. 30, No. 6 Aqua Safari and Living Underwater, Cozumel Two different dive operators, two different views IN THIS ISSUE: Aqua Safari and Living These days, I get many reader queries about two dive Underwater, Cozumel . 1. destinations in particular -- Raja Ampat and Cozumel. While we periodically cover Raja Ampat, it has been a Your Fellow Divers Need Your while since we’ve written about Cozumel, and because two Reader Reports . 3. of our long-time correspondents were heading there just weeks apart, I decided to run stories with contrasting Dehydration and Diving . 4. views about two different dive operators. I think this can be extremely helpful for divers who have never vis- Could This Diver’s Death Have ited Cozumel, and for those who have, perhaps our writers Been Prevented? . .6 . will offer you new options. Now, go get wet! Little Cayman, Cocos, Palau . 9. -- Ben Davison They Left Without the Dead * * * * * Diver’s Body . 11. Murder of Stuart Cove’s Dock listening for splendid toadfish Manager . 12. Dear Fellow Diver: Rarest Dive Watch Ever? . 13. One of my favorite fish is Cozumel’s endemic splen- Starving Underwater did toadfish, which I look for under low-ceiling recesses Photographers: Part I . 14. on the sand. The vibrant yellow fin borders and gray-, blue- and white-striped body pop out, making its discovery Dive Your Golf Course . 15. a real treat. As a repeat diver with Aqua Safari, I was Bubbles Up . 16. fortunate on this trip to be guided by Mariano, a Yucatan native who has been Bad Night on the Wind Dancer 17 with Aqua Safari for 20 years.