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www.aquatutus.org Since 1955; now in our 65th year of diving safety & fun March 2020 Since 1958... a publicaon from the Aqua Tutus Diving Club a non-pro"t organizaon We understand that many are concerned about the current COVID-19 pandem- established to promote Water Safety and to ic and we hope that all club members and family are staying safe and healthy during this difficult time. In support of Governor Newsom’s Executive Order further the sport of SCU(A Diving. for Californians to remain at home and only essential activities to continue, ggg We Welcome everyone ! the Aqua Tutus Board is postponing all club activities until further notice. The Board will continue to monitor the situation and will provide a follow-up notifi- MEETING SCHEDULE cation once it is safe to resume club activities. General Club Meeting: First Thursday of Every Month at 7:30 p.m. Social at 7:00. In the meantime, while we can’t meet in person, we can “meet” on the club (except December, no meeting). Facebook page. This is a difficult time for all, so let’s share positive stories, Board of Directors Meeting: Third Thurs- photos, or videos of past dives, future dive plans, or other ocean adventures. day of Every Month at 7:00 pm. 6:30 din- ner’ (except December, no meeting) We appreciate your understanding. Location: Ricky’s Sports Theatre & Grill * 15028 Hesperian Blvd. Aqua Tutus Board San Leandro, CA 94578 * near Bayfair BART station Mail: P, (o- .10.. Castro 0alley CA 91512 Due to restrictions regarding the coronavirus UPCOMING HIGHLIGHTS We will NOT hold the general *events subject to COVID19 constraints membership meeting on April 2 April 26: Free dive practice with Dennis ** ** May 8-18 : Dennis & others to Indonesia. May 30 & 31 : SCUBA show, LA June 13 : Entries & Exits practice, Dennis PROGRAM for April 2 General Meeting July 18 : Club dive, Jade Cove. August : Club dive at Lake Tahoe Oran Arms ... Underwater Remotely Controlled August 14-15 : Club weekend, Salt Point Vehicles For a complete listing of club activities visit Meetup or ATDC Event Calendar . See more event details on page 12 IN THIS ISSUE Entertainment Report ...................... 2-3 General & BOD Meeting Minutes …. 4-6 Arnie’s Tech Tidbits, Episode 10 …. 8-10 Larry’s Scubaboard review ………….. 11 Reports, Training, Events, Travel ..12–16 Club contacts & useful links ..…......…17 ACKNOWLEDGMENTS Learn how robotics and automation are shaping the future of underwater exploration. April's guest Thank you presenters and newsletter con- speaker works for Sofar Ocean tributors for making this Aqua Tooter possi- (www.sofarocean.com), a technology company in ble this month: Alan Throop, Gayle Hudson, San Francisco with the mission of connecting humanity to the ocean. He will be Linda Phillips, Arnie Warshawsky, Kari Klaboe, Brent Durand, Oran Arms, Kat discussing innovations in ocean exploration and environmental monitoring. Smith, Dave Chervin, Larry Dimitri. Oran is a Bay Area native with a background in sustainability and renewable energy systems. Understanding the importance of a healthy ocean on our species' Thanks to Steele’s Discount Scuba for existence, he is passionate about promoting Sofar's Trident ROV and Spotter sending member candidates to Aqua Tutus smart buoy, both of which provide data and information the public needs to make Diving Club. Steele’s is located at: safer decisions with regards to ocean conditions. By making the tools to explore 5987 Telegraph Avenue and monitor the ocean more accessible, Sofar hopes that more people will be in- Oakland, CA 94609 spired to be good stewards of the Earth's most important, yet relatively unknown (510) 655-4344 See Ad On Training Page resource. 1 | The Aqua Tooter March, 2020 area, where a diver PROGRAM REPORT needs to climb down a By Alan Throop & Brent Durand small cliff to get to a (photos by Brrent Durand, except as noted) secluded cove. Brent showed a image (selfie) Underwater photographer Brent Durand shared a collection of himself with his dive of California images during our gear rappelling down a last meeting. The journey began cliff, with the ocean in in San Diego and took us the background. This through the upper edges of immediately tells the Mendocino County, intertwining viewer a lot about what photos and videos with tales of is special about this unique dive adventures and dive site. [NOTE: photographers might want to remember this insights into the way Brent ap- when we dive at Jade Cove in a proaches photography. He dis- few months!] cussed a number of tips, an- He also showed photos where he swered questions and offered used a snoot on his flash: by light- advice for photographers of all Photo: Linda Phillips ing the subject mainly and not the levels. This ranged from direction of light all the way to encour- water in front of it, the backscatter aging positive interactions with seals and sea lions. The major can be minimized. In this area a lot takeaway for our group is that it’s not about how much you can of his diving was from a kayak, spend on a camera system… it’s about how you approach used to reach some of the sites photography to create exceptional images with any camera. that were not practical to do with a Here, we’ll try to capture just some of what he presented. surface swim. One photo he Brent moved from the LA area to the Bay Area about 2 years showed was interesting in this re- ago. He is now the representative for Atlantis Dive Resorts gard: their camera systems were (https://atlantishotel.com/ ), which includes resorts in hung on a rope from the kayaks Dumaguete and Puerto Galera in the Philippines that our club during a surface interval; and when has enjoyed several times, plus a liveaboard boat the Azores. they re-entered the water, a He is an avid local diver … for wherever is local for him … and rockfish had taken up hiding he enjoys sharing his passion for the ocean and photography. in the arms of the strobe and To really appreciate these passions and the skill and teaching camera … a fun image to that he brings to it, check out his website at https:// viewers to see. brentdurand.com/ for some of his spectacular images and ex- He showed images from the cellent video tutorials. famous “squid spawns” in the In his program he took us “behind the lens” to offer some of south, where the market his thoughts and tips on how he creates his beautiful images squids come from the depths and great video clips, while showcasing the wonderful diving to mate and lay eggs, typical- we have on the west ly in the winter. Timing and coast. Here, we’ll focus on perseverance are important some of the tips he of- to work around their sched- fered. ule, usually shooting at night. Brent began by showing The lighting is tricky to cap- images from the San Die- ture their shiny bodies. For go area where he talked some creativity from the about the use of light rays standard shots, Brent even to add beauty and drama tried experimenting with col- to an image and to lead ored gels over the strobes. the eye in the image. He created these by staying close to the He showed how this spawning attracts other predators - crabs, surface. From here, he also had an unusual and well-done bat rays, even nudibranchs – that come for the feast. image of a turtle with a In discussing some heavy, shaggy coat of al- beautiful shots of Spanish gae … most unusual. He Shawls, Brent showed shared several interactive them mating and laying shots with sea lions and colorful eggs – behaviors talked about how to main- that help make photos of tain their interest in the common subjects unique. divers by bringing toys and He discussed composing keeping them excited to the images so that the nu- play. In Casino Point at dibranch rhinophores were Catalina he showed a nice on the same focal plane as the eggs in order to keep all the over-under images of kelp and the Casino. In his programs a essential details in focus. shot like this is used to “set the scene” to establish where the He showed some beautiful images of the unusual Melibe nu- viewer is, with the kelp representing what is special about the dibranchs, which have large translucent hoods that they use to diving there. capture their small prey in the water. Getting the correct light- Another example of this was an interesting shot from the LA (Continued on next page) 2 | The Aqua Tooter March, 2020 ing and composition to Reef Check Training is starting !! make a technically good and interesting image is challenging. From the Monterey area – his recentPhoto “local 5b diving” spot since he moved to the Bay Area – he showed how the often -green water can be used to an advantage by choosing the correct color sub- jects; the red of anemones or At our general meeting, Dave Chervin announced the 2020 bat stars on rocks or the or- Reef Check training schedule is out. Reef Check uses transect ange of a jellyfish is a pleasing diving and certified volunteers to provide scientific-grade data to match for the green water. the researchers and government agencies to help manage the marine ecosystems. It is rigorous training and divers must have Around here, he often tends a certain level of confidence. to focus on the large variety of small-but-colorful subjects, like Entry requirements are 30 lifetime dives, 15 cold-water dives, nudibranchs; but the fish schools, sea lions, jellyfish, and har- six dives in the last year, and the minimum age is 16 bor seals also offer great subjects.
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  • Guideline for Technical Regulation on Hydropower Civil Works

    Guideline for Technical Regulation on Hydropower Civil Works

    SOCIALIST REPUBLIC OF VIETNAM Ministry of Construction (MOC) Guideline for Technical Regulation on Hydropower Civil Works Design and Construction of Civil Works and Hydromechanical Equipment Final Draft June 2013 Japan International Cooperation Agency Electric Power Development Co., Ltd. Shikoku Electric Power Co., Inc. West Japan Engineering Consultants, Inc. IL CR(2) 13-096 Guideline for QCVN xxxx : 2013/BXD Table of Contents 1. Scope of application .................................................................................................. 1 2. Reference documents ............................................................................................... 1 3. Nomenclatures and definitions ................................................................................. 1 4. Classification of works .............................................................................................. 1 4.1 General stipulation ................................................................................................. 1 4.2 Principles for the classification of hydropower works .............................................. 2 5. Guarantee of serving level of hydropower works .................................................... 7 6. Safety coefficient of hydropower civil works ........................................................... 7 7. Construction of hydropower civil works ................................................................ 26 7.1 General requirements .........................................................................................