Rob
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- New Study to Provide Insight into Passenger Ship Comfort Maritime Reporter, Feb 2015 #20
Comfort is considered to be a crucial factor on board passenger ships as it largely determines passenger satisfaction, on board expenditure and passenger return levels. However, comfort is subjective as people are very different. Where one passenger complains about discomfort, the other may hardly notice anything.
Passenger comfort is determined by a large variety of factors including the interior design of public spaces, temperature and smell. However, within the context of MARIN’s services, we will limit ourselves to the hydrodynamic aspects that might influence comfort. Within the cruise and ferry team; powering, manoeuvring and sea keeping specialists join forces and work together to assess the hydrodynamic behavior that influences comfort i.e. ship motions, heeling angle during manoeuvres and the propeller and slamming-induced vibrations and noise. This article focuses on the sea keeping related to passenger discomfort.
Ultra Large & Ultra Luxurious
In the last decade there has been a clear trend towards either ultra luxurious cruise ships or ultra large cruise ships. Luxurious ships typically have a gross tonnage (GT) of less than 50,000 and the number of passengers is often fewer than 500. These cruises are often to exclusive destinations worldwide, and they call at smaller ports. Due to the relatively limited size of these vessels, the ship motions play an important role in the comfort levels.
This is in sharp contrast with the ultra large cruise ships, which have a gross tonnage of more than 100,000 and a passenger capacity of over 4,000 passengers. These cruise ships typically offer one to two-week cruises to popular destinations in the Caribbean and the Mediterranean. Due to the size of these ships, the ship motions are negligible in most weather conditions. Therefore, sea keeping related discomfort is more likely to arise from slamming induced vibrations and noise. Another major trend concerning passenger ships is the cruise ferry concept. The size of these ships is often close to that of ultra luxurious cruise ships, whereas the passenger space is similar to that of ultra large cruise ships. When compared to cruise ships, these cruise ferries have a short voyage duration and are sailing on a fixed route.
Accelerations are caused by the combined ship motions (surge, sway, heave, roll, pitch and yaw). The discomfort experienced, as a result of these accelerations, relates to seasickness and disruptions during all kinds of on board activities.
Accelerations
Seasickness does not necessarily imply vomiting (the ‘limiting’ case that should be prevented in any way) but more importantly, it is the sense of feeling unwell, as this drives passengers to stop certain activities. Seasickness is mainly caused by vertical accelerations but the horizontal accelerations and the combination of both are also important. As criterion the Illness Rating (IR) is applied, which has been developed within the EU COMPASS project.
Ship motion induced disruptions relate to the reduced ability to keep one’s balance while standing, going up the stairs and dancing etc. As criterion the ‘effective gravity angle’ (EGA) is adopted. It is dominated by the accelerations in the horizontal plane, although the vertical accelerations contribute as well. The EGA is not only a direct measure of people needing to look for support to stand still but also for instance, when glasses start to slide or tip over.
Increasing Knowledge
Typical phenomena that might induce vibrations and noise are bow flare and stern slamming. Bow flare slamming occurs mainly when sailing in steep seas from the bow quarter, while stern slamming typically takes place at low or zero speed in relatively low seas (or in high head seas conditions). These conditions might occur at anchor in exposed areas or during a port approach. The best measure of discomfort due to slamming induced vibrations seems to be the Vibration Dose Value (VDV).
Although the above-mentioned criteria cover a large variety of sea keeping aspects, it is important to further increase the industry’s knowledge about actual passenger ship operations and how they are influenced by ship hydrodynamics. Which powering, manoeuvring and sea keeping aspects cause reduced passenger comfort or even the cancellation of activities such as the closure of promenade decks/swimming pools or even shows? To answer some of these questions, MARIN decided to start a two-year research program. Cruise and ferry operators, yards and consultants are invited to share their experiences.The Author
Rob Grin is Senior Project Managers of the Ships department of MARIN, the Maritime Research Institute Netherlands. MARIN offers simulation, model testing, full-scale measurements and training programs, to the shipbuilding and offshore industry and governments.
E: [email protected].
(As published in the February 2015 edition of Maritime Reporter & Engineering News - http://magazines.marinelink.com/Magazines/MaritimeReporter)
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- Turbulence Microstructure Measurements from a Wave Powered Profiler Marine Technology, Jul 2013 #42
the wire. In this way, high quality oceanographic data can be collected on each upcast. As the WW is a completely mechanical design, it has proven to be a robust, reliable profiler. Compared to buoyancy-controlled floats and gliders, which have limited payload capacity, the WW only requires rough ballasting
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- Digital Technology Enhances Marine Communications Marine News, Nov 2016 #90
providers, one of which was David Clark, who provided the digital intercom system and integration of our stereo and radio systems with the headsets,” said Rob Goley, Business Development Director for Federal Programs for SAFE Boats. Goley added: “At SAFE Boats, we provide products that demand proven performance
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- Marine Engine Emissions: GE Changes the Conversation Maritime Logistics Professional, Q4 2014 #33
in early 2016. Even before that, however, Harvey Gulf International Marine and Eastern Shipbuilding Group entered into a contract to construct a new Robert Allan, LTD. (RAL) RAmpage 6400 Multipurpose Field Support Vessel (MPFSV) at Eastern’s Panama City, Florida facilities. The MPFSV Hybrid designed
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- Engine Emissions: GE Changes the Conversation Maritime Logistics Professional, Q4 2014 #33
launch in early 2016. Even before that, however, Harvey Gulf International Marine and Eastern Shipbuilding Group entered into a contract to construct a new Robert Allan, LTD. (RAL) RAmpage 6400 Multipurpose Field Support Vessel (MPFSV) at Eastern’s Panama City, Florida facilities. The MPFSV Hybrid designed
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- World's Largest Fish Pump For Chile Maritime Reporter, Apr 1992 #60
pumps is 200-250 tons per hour. The twin tanks are 220 cu.ft. each compared to about 100 cu.ft. each for the next highest volume twin tank. Rob Zurrer, international sales manager for Innovac, calls the Transvac 6275 "the most powerful vacuum fish pump built in the world." The impellorless
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- MN100: Larson Electronics LLC Marine News, Aug 2016 #41
boats. 9419 E US Highway 175 Kemp, TX 75143 Tel: (903) 498-3363 Email: [email protected] Website: www.larsonelectronics.com CEO/President: Rob Bresnahan (As published in the August 2016 MN100 edition of Marine News
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- America’s First Marine Highway Comes Back to Life Marine News, Apr 2014 #40
surprise you to know that at least five barge towing companies ply the NYS Canal System. NYS Marine Highways is one of those firms. NYS Marine Highways’ Rob Goldman told MarineNews in March that his firm accounts for as much as 85 percent of all cargo moved on the canal last year. He said, “The canal is
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- W. Palm T-Ball Flies “Maritime Reporter” Flag Maritime Reporter, Jun 2014 #12
of fans. The boys, some of whom have played together for three seasons running, are seeing their hard work pay off. New to the squad, first baseman Robert Howard is formidable at the plate and has a glove like a gill net. Anything but an ordinary average guy, pitcher Joe Walsh holds down the center
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- Mark Your Calendar Maritime Reporter, Dec 2004 #15
regarding this crucial maritime event, or visit www.sname.org for program details. To book a booth in the expanded exhibition hall, contact Rob Howard at tel: 561-732-4368 or e-mail: [email protected] edge coverage properties of the Sigma solvent free product range. The solvent free
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- Crescent Tankships Orders Product Tankers Maritime Reporter, Oct 2002 #11
, our first newbuildings since 1989, and the acquisition of the Camilla, show our confidence in the future of the clean products market in Europe," says Rob Bennett, managing director of Crescent Tankships. "We believe this high intensity market will become even more demanding, so with the backing of
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- AWO's Wilson Warns User Tax On Waterways Will Damage National Economy Maritime Reporter, Apr 1983 #109
barge freight must be matched with a cost recovery system for the billions of dollars in subsidy to rail freight." He cautioned, "We must not rob Peter to pay Paul." Mr. Wilson admitted that "As part of the Administration's package of proposals to shift financial responsibility to the private sec
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![MT Mar-24#46 ,
starting top left]: Cellula Robotics’ CEO Neil
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March 2024 - Marine Technology Reporter page: 46TV’s professional video team was out and about at Oi in London for nearly 20 executive interviews, including [clockwise, starting top left]: Cellula Robotics’ CEO Neil Manning; Rob Dewell, Integration Engineer, Saab UK who put the new eM1-7 electric manipulator through its paces (below); and SMDs
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March 2024 - Marine Technology Reporter page: 45complete range of Bayonet autonomous underwater ground vehicles (AUGVs). “We are excited to welcome BUVI Scandinavia and USP to our Growth Team,” said Rob Howard, Greensea IQ’s CGO. “Their representa- tion in these key regions strengthens our efforts to provide h h h h h d Wals RichardW als Richard Wals
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March 2024 - Marine Technology Reporter page: 44Quartley, MD, Valeport and Ole Søe-Pedersen, VP & Image courtesy Teledyne Marine GM Teledyne Marine announce the deal in London. Pictured (L-R): Cellula Robotics, President, Eric Jackson, Metron Inc. President and CEO, Van Gurley, and Cellula Robotics CEO, Neil Manning. Chris Blake, VP Survey, Unique
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March 2024 - Marine Technology Reporter page: 41Technology Image courtesy Exail Image courtesy Submaris and EvoLogics Vehicles The ROV-1500 from Outland Technology represents a leap forward in underwater robotics, a compact remotely operated vehicle (ROV) weighing in at less than 40 lbs (19kg) the ROV- 1500 is easy to transport and deploy. Similar to Outland’s
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April 2024 - Maritime Reporter and Engineering News page: 22NEW LEASE ROUNDS COMING AND NEW OPPORTUNITIES, WE DO NOT SEE A BIG SLOWDOWN FOR OSW DEVELOPMENTS APART FROM THE OBVIOUS PROJECT DELAYS AND RE-BIDS. ROB LANGFORD, VP, GLOBAL OFFSHORE WIND, ABS “Some of them do understand, but I think there’s more work projects and lease areas. Virginia Offshore Wind
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April 2024 - Maritime Reporter and Engineering News page: 21ROB LANGFORD, VP, GLOBAL OFFSHORE WIND ob Langford has worked in the offshore industry ABS. “We are growing and evolving our services across all for more than three decades, ‘cutting his teeth’ offshore infrastructure along with our continued support to the in a UK design ? rm working in the North Sea
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April 2024 - Maritime Reporter and Engineering News page: 20INTERVIEW One-on-One with ROB LANGFORD, VP, GLOBAL OFFSHORE WIND As the U.S. offshore wind industry endures a predictable number of stops and starts during its adolescence, common mantras are ‘learn from the established European model’ and ‘embrace technology transfer from the offshore oil and gas
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April 2024 - Maritime Reporter and Engineering News page: 2wind grows globally, so too do the dynamics around SOVs. By Philip Lewis 4 Authors & Contributors 6 Editorial 8 Training Tips for Ships 20 Interview: Rob Langford, ABS Behavior-Based Safety ABS’ VP of Global Offshore Wind dissects market movements in U.S., as well as 10 Maritime Safey the vast potential
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April 2024 - Maritime Reporter and Engineering News page: Cover75, Radm Sobeck discusses the need for new ships & mariners O? shore Energy Analyzing Since 1939 | Number 4 | Volume 86 SOV Demand Drivers One-on-One Rob Langford, VP Global O? shore Wind, ABS Heavy Lif New Cranes for O? shore E? ciency Simulators & our Changing Relationship with Technology COV1
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February 2024 - Maritime Reporter and Engineering News page: 14Maintain biosecurity Improve performance T e Four E’s of Marine Sustainability: EverClean’s Solution to Biofouling t is a new year, but the age-old problem of biofouling per- may seem, the early returns suggest taking a truly proactive sists. Previous articles in this publication have highlighted cleaning
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November 2023 - Marine Technology Reporter page: 28TECH INSIGHTS GREENSEA IQ Greensea IQ Expands The Greensea IQ Team EverClean Hull Cleaning Robot Images courtesy Greensea IQ On October 17, 2023, the water- Bayonet specializes front in Plymouth, MA, was abuzz in Autonomous Un- with innovation and excitement. A derwater Ground demonstration and ribbon-cut
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September 2023 - Marine Technology Reporter page: 44device will be idle for long periods. powered pro? lers that are used in long-term deployments,” The company’s BCX solution is designed speci? cally says Rob Lee, Director of Marketing. RBR has also deployed for low temperature performance. Arden Johnson, Fellow its RBRfermata battery canister and its RBRcervata
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June 2023 - Marine News page: 28from 2021 through 2022 and are being used Command, Austal USA is also building four Navajo-class to inform the requirements and ship speci? cation,” Rob- Towing, Salvage, and Rescue Ships (T-ATS 11 - 14). inson said. “The Navy intends to award a contract for the lead ship in 2025.” Coast Guard’s big
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August 2023 - Marine News page: 27Clark Series 9100 hybrid (wired and wireless) system was installed on the Multi-Mission Interceptor (MMI) demo patrol boat from SAFE Boats International. Rob Goley, Coast Guard veteran and now Business Development Director for Federal Programs at SAFE Boats International, had this to say: “Many missions
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July 2023 - Marine Technology Reporter page: 16author gratefully acknowledges the contributions of Michael May, Decisive Testing; Mike Gomper (Clint Precision Manufactur- ing); Reed Jackson (RJ Machine); Rob Klidy, Manager, Scripps Institution of Oceanography/UCSD Machine Shop, Stephen Dexter “Handbook of Oceanographic Engineering Materials”; R. Frank Busby
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February 2023 - Marine News page: 42, located on the main deck, while two cabins for four crew members are located on the lower deck. The main propulsion for the tug comprises a pair of Cat- Robert Allan Ltd. erpillar 3512E, EPA Tier 4 certi? ed diesel engines, each rated 2,213 bHP at 1,600 rpm, and driving a Schottel SRP Coden, Ala. shipbuilder
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January 2023 - Marine Technology Reporter page: 8Fastener sizes range from #8 to ¾” bolts.” More information at loading with roll, pitch and heave.
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September 2022 - Marine Technology Reporter page: 74is in progress. Topside, there’s only the Acknowledgements knowledge that the timer was set correctly, and was count- The author thanks Greg MacEachern and Rob Morris, Ed- ing down when it was deployed. On the day of recovery, we geTech, Gary Burnhardt, formerly with Benthos, John Kemp, hang out and wait
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September 2022 - Marine Technology Reporter page: 65University of Western Australia to the deepest points of these two trenches, and mechanical help further our knowledge of life in the deep ocean. All probes into them have been very rare. Both trenches were data and samples collected will be shared with the local extensively mapped in detail by the expedition
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October 2022 - Marine News page: 52MN Robert Allan Ltd. NETSCo Richard Mike Fitzpatrick Mueller Robert Allan Ltd NETSCo NETSCo also has multiple ongoing projects in the off- Asked about where he sees greatest opportunities for Rob- shore wind turbine industry. A Stowage Survey was recently ert Allan Ltd. In the U.S., the ? rm’s president
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October 2022 - Marine News page: 16company to C&B Marine, C&B Energy Services and Carlisle & Bray “Our mission is to provide the safest most value added C&B Repair and Maintenance. Rob Carlisle, President; Scott Bray, CFO; and Dave service to our customers whatever they may need,” said Orme, COO; make up C&B’s leadership team. Top
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September 2022 - Marine News page: 36engine it will take two years to work through that backlog, Steb- components and maritime paints are hard to get, as are bings said, calling it a very problematic delay for ports buoys and navigational aids. These west coast challenges whose permits have been “on hold for up to four years.” could drive
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May 2022 - Maritime Reporter and Engineering News page: 36GREEN MARINE CLEAN HULLS The Armach Robotics Team John DunnRob HowardJames TrumanAlex KernKarl LanderHarrison Gardner “Team and culture is everything to me. It’s critical to the suc- were in graduate school at Johns Hopkins together. James cess of a company, it’s critical to our enjoyment of our jobs
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May 2022 - Marine News page: 27gional jail inmates soon to be released than the average for all occupations. and needing skills and employment. For the inland waterways, however, Ron Robbins is the College’s Marine that projection is 25%! Technology Program Coordinator/ Paducah, Ky. is surely the central city Instructor. He said that