Hull Design Defects Part I Photos by David H.Pascoe,Marine Surveyor .Here's a good example of poor design and construction detail.Utilizing a glass over plywood framing system,there are no fillets under the frames or stringers which are butted hard against the hull.This creates hardspots with the propensity for stress cracking.Yacht Survey Online List of All Articles on Boats Hull Design Defects Part I; Hull Design Defects Part II; Surveying Storm Damaged Boats; Surveying Boats with Grid Liners David Pascoe is a second generation marine surveyor in his family who began his surveying career at age 16 as an apprentice in 1965 as the era of wooden boats was drawing to a close.Certified by the National Association Thermal Imaging Sun Coast MarineThe advantage of using a thermal camera is these defects in the integrity of the hull are more easily discovered when surveying a vessel.Once the thermal anomaly has been discovered then we confirm the finding by using other tools such as a GRP 33 brand moisture meter and percussion hammer.
It was not caused by the ordinary action of the wind and waves (see r 7 of the Construction Rules in the First Schedule to the Marine Insurance Act 1906),but by the frequent and violent impacts of a badly designed hull upon an adverse sea.If the defects in design and construction had been the sole cause of the loss,then the THE APPLICATION AND INSPECTION OF MARINEholds and outer hull anti-fouling systems.Figure 1 gives a brief timeline of requirements or recommendations from IMO and IACS.These Guidance Notes start with the basics of the chemistry,and mechanics of corrosion to understand protective coatings as a barrier to corrosion.The coating application process technology and coating inspectionStress Cracks,Finishes and Surface Defects on Boat Mid Certified by the National Association of Marine Surveyors in 1972,he has conducted over 5,000 pre purchase surveys in addition to having conducted hundreds of boating accident investigations,including fires,sinkings,hull failures and machinery failure analysis.
Jun 23,2008 Marine Surveying Hull Design Defects#0183;I believe a boat survey has to be boat specific,it would be like a dentist advising you on your dental work without seeing your xrays or examining your mouth.The following is a phone number I got out of Boats and Harbors that offers to sell much stuff related to marine surveying including forms and lists.good luck,rusty 1-800-245-4425Society of Accredited Marine Surveyors - SAMSThe Society of Accredited Marine Surveyors Marine Surveying Hull Design Defects(SAMS Marine Surveying Hull Design Defects#174;) was established during the 1980s by a small group of surveying professionals wishing to advance their craft.More on this and the general philosophy of SAMS Marine Surveying Hull Design Defectscan be found under SAMS Marine Surveying Hull Design DefectsHistory and Philosophy..SAMS Marine Surveying Hull Design DefectsMembership Roster includes close to 1000 surveyors in the United States and over 20 other countries around the world.Sample Marine Survey Marine Surveys Consulting,Sample prepurchase marine survey.SAMS Accredited Marine Surveyor for yachts and small commercial craft. The hull structure was sound with no delamination or structural defects found.No damage or previous repairs were noted. The hull was a fin keel design.The ballast was internal in the molded FRP hull.The hull was a full keel design
Table 5 outlines the final defect analysis of the weld inspection carried by the offshore operator on the butt welds in the outer hull.The final repair rate of 0.09% is considered excellent.An analysis of the defect types encountered shows that slag inclusion was by far the main cause of repair,particularly with GSFCAW process).Previous123456NextPeople also askIs a surveyor a hull?Is a surveyor a hull?In order to survey a hull,a surveyor needs to have a basic understanding of the engineering principles involved.This does not mean that the surveyor himself must be an engineer,for many of the people who design and build boats are not themselves engineers or naval architects.Reference davidpascoe/survey_book_chapt5.htm results for this questionAre high speed boats vulnerable to design defects?Are high speed boats vulnerable to design defects?The faster a boat goes,the more stress it is subjected to.It follows,then,that high speed boats are considerably more vulnerable to design defects.This also means that that any evidence of stress cracking or other problems needs to be evaluated relative to the vessel's speed,as well as it's age.Marine Surveying Hull Design Defects - Hull Failure Part
Hull Damages and Defects 1.3 Poor Workmanship a) Poor welding b) Poor alignment c) Sub-standard material d) Poor finish omission 1.4 Fatigue by Vibration a) Mechanical Source b) Hydrodynamic Source c) Stiffeners span too big d) Sometimes weak superstructure Reederei Nord Hull Inspection Damage and Repair 31.10.2018 5 1.Moisture Meters on Boat Hulls - Do They Produce Reliable What with the reintroduction of cored boat bottoms,the most critical question that the surveyor wants to answer is whether water has gotten into the core because this can be fatal to boat hulls.The ultimate horror story for boats Outer skin of hull is removed to display water-soaked balsa core.Marine Surveying Online Articles and Books by David Hull Design Defects Part I This series of articles is written exclusively for marine surveyors to help identify the wide range of structural defects that can be found in boats and yachts.
learned the hard way that surveying wood boats is very difficult and fraught with risks.As private individuals,marine surveyors cannot fall back on lame excuses such as not having adequate guidance,or not finding any evidence or being inhibited in one way or anotherMarine Surveying Survey Guide to Insurance SurveysThe survey has two primary purposes (1) to identify the vessel,its equipment,condition and general value,and (2) to identify defects,damages or hazardous conditions that pose a potential threat to the safety of the vessel and its passengers,or any other such condition thatMarine Surveying Hull Design Defects - Hull Failure Part Online article for marine surveyors by David Pascoe,marine surveyor,NAMS-CMS.This series of articles is written exclusively for marine surveyors to help identify the wide range of structural defects that can be found in boats and yachts.Because there is such a diversity in types of hulls,design styles and an ever-expanding array of new construction materials,it is difficult for surveyors
Inspections are made during and after the manufacturing cycle to ensure that parts meet specifications.Types of inspection include nondestructive examination (NDE),in which no portion of the completed weld is destroyed,and destructive tests,in which the weld isMarine Survey Practice Hull Survey MethodsHull survey methods are therefore not only comprehensive means of detecting deficiencies or monitoring structural condition,but also of defining schemes for inspection between the last overhaul and before the occurrence of failure.Means of detection of defectsMarine Survey Practice Guidelines on survey for Marine Marine surveyors perform inspections of vessels of all types including pleasure craft,passenger vessels,tugboats,barges,dredges,oil rigs,ferries,cargo vessels and warships,as well as marine cargo,marine engines and facilities such as canals,drydocks,loading docks and more for the purpose of pre-purchase evaluation,insurance eligibility,insurance claim resolution and regulation
This blog intended to provide information and experience to professionals who work in the difficult career of Marine Surveyor. methods in combination with material certification by class requirements have to a great extent excluded material defects in plates and shapes used in hull structures during shipbuilding. applied designMarine Survey Online Articles on Boats,Yachts Marine Surveying Hull Design Defects#0183;marinesurvey,Marine Survey Online by D.H.Pascoe Co.,Inc.,Marine Surveyors,Destin,Florida Informative articles for boat or yacht buyers and owners.MARINE INSPECTION SURVEY REPORT Flybridge MotorThe hull is in good overall condition,no osmosis.Above Water hull/topsides In good condition Gel-coat white.Deck Housing Stainless steel bow rail to mid-ships with 2 rows of s/steel safety lines,good condition.S/steel stanchions,well secured,good condition.Fibreglass duck-board,good condition.
Jul 26,2013 Marine Surveying Hull Design Defects#0183;When a boat owner reports a loss that is not obviously due to a collision,the adjuster and surveyor will certainly be looking for evidence of an excluded manufacturers defect.In the case of core problems,the insurer is very likely to deny coverage on that basis unless there is clear evidence of a collision that punctured the outer hull.Inspection services - Agriculture Industry Marine Control Diving services Underwater worksAIM is the leader in providing diving services underwater works for maritime with vessel,ship and offshore project at 02 main jobs are Marine warranty,Surveying and Maintenance.Clients are typically port authorities,shipping companies,ship owners,insurance companies,shipyards,maritime main and general contractors as well as operators Offshore projectsHull and Its Structures Surveying Fiberglass Power Boats The Marine Survey Business.Written for both the aspiring,novice and experienced surveyor,Surveying Fiberglass Power Boats provides a foundation of essentials for anyone who wants to begin a marine surveying career,or just hone up on one's skills and knowledge.
yet discovered.Examples of latent defects are errors in design,errors in material and faulty workmanship.Coverage for latent defects in hull insurance has developed gradually since the so-called Inchmaree clause was introduced as a part of the first edition of the English hull insurance clauses,the Institute Time Clauses Hulls 1888.Hull Insurance of Latent defects i.e.Errors in Design yet discovered.Examples of latent defects are errors in design,errors in material and faulty workmanship.Coverage for latent defects in hull insurance has developed gradually since the so-called Inchmaree clause was introduced as a part of the first edition of the English hull insurance clauses,the Institute Time Clauses Hulls 1888.Hull Inspections - Applied Technical ServicesHull inspections help ensure ships maintain safe and effective operation by checking both hull thickness and any hull defects or damage that may be present.If left undiscovered early on,hull defects could potentially further deteriorate and develop into more substantial damage.
Whether the surveyor deals exclusively with prepurchase surveys,insurance claims or marine expert related matters,learning how to locate,detect and evaluate is a critical factor in the surveyor's work.This essay deals with basic principles of hull design,along with cause and effect analysis of hull failures.Hull Design Defects - Marine SurveyHull Design Defects Part II Photos by David H.Pascoe,Marine Surveyor .Example of hard spot caused by improper stringer design and installation. David H.Pascoe is a marine surveyor (retired) with 40 years' experience.He is author and publisher of power boat books Mid Size Power Boats Surveying Fiberglass Power Boats 2E Buyers GLADDING MARINE SURVEYING AND CONSULTINGGLADDING MARINE SURVEYING AND CONSULTING,LLC 1738 PICKWICK PLACE-FLEMING ISLAND-FLORIDA-32003 basic external checks and oil analysis by hull surveyor VESSEL MACHINERY DATA Vessel identification numbers This survey cannot check for latent defects which could not readily be discovered by inspection without removal of machinery,tanks
GLADDING MARINE SURVEYING AND CONSULTING,LLC 1738 PICKWICK PLACE-FLEMING ISLAND-FLORIDA-32003 basic external checks and oil analysis by hull surveyor VESSEL MACHINERY DATA Vessel identification numbers This survey cannot check for latent defects which could not readily be discovered by inspection without removal of machinery,tanks Fundamentals of Restoration Projects This Old BoatCertified by the National Association of Marine Surveyors in 1972,he has conducted over 5,000 pre purchase surveys in addition to having conducted hundreds of boating accident investigations,including fires,sinkings,hull failures and machinery failure analysis.FLR3694 - Module 9.pdf - DIPLOMA IN MARINE SURVEYING View FLR3694 - Module 9.pdf from SOC 211 at University of the Fraser Valley.DIPLOMA IN MARINE SURVEYING Module 9 Hull and Structural Surveys Course Director Allan T
The unfinished hull in Vietnam was sold for scrap.The customer commenced proceedings against the marine consultant and the naval architect claiming that they had suffered losses in the amount of US$ 10m.Experts were engaged to advise on liability.It was clear that while there were design errors these were not as serious as alleged by the Deaspec Marine Surveying Boat Inspection MelbourneWe provide vessel survey requirements for all recreational marine craft around Melbourne,Geelong and across Victoria.The most common types of surveys we carry-out are Pre-purchase,Insurance Risk,Damage surveys and condition reports for vessel os all lengths,makes and models.Composite Boat Damage Assessment - Eric GreeneJack Allinson is a marine surveyor located in Jacksonville,FL who makes extensive use of infrared imaging to diagnose fiberglass boat structural problems and gives seminars on the use of infrared imaging equipment in marine surveying.Mr.Allinson notes Infrared imaging clearly is a valuable tool for a marine surveyor.
Jack Allinson is a marine surveyor located in Jacksonville,FL who makes extensive use of infrared imaging to diagnose fiberglass boat structural problems and gives seminars on the use of infrared imaging equipment in marine surveying.Mr.Allinson notes Infrared imaging clearly is a valuable tool for a marine surveyor.Cheeki Rafiki Keel Failure - Marine Surveyor Study - IIMSJan 16,2015 Marine Surveying Hull Design Defects#0183;It is essential that the marine surveyor adopts good practice when examining an frp pendulum keel boat when she is in a travel hoist or,better,in a steel cradle,and for to take hold of the bottom of the pendulum and try to move it from side to side looking for any traces of movement between the keel and the hull.Boats,Yachts Hull Design - Part IIAll surveyors who are serious students of hull failures have encountered this anomaly that often seems to defy explanation.Example of hard spot caused by improper stringer design and installation.Bottom hinges around hard edge of stringer wood core.
Sounding a hull is an audible technique that requires a high degree of skill and finesse.We've seen surveyors attack hulls with a plastic hammer as though they were driving nails.That may turn up a severe delamination,but its not likely to reveal a small blister.Boat Types Hull Design Basics Buyers' Guide to Marine Investigations (2004).In addition to readers in the United States,boaters and boat industry professionals worldwide from over 70 countries have purchased David Pascoe's books,since introduction of his first book in 2001.In 2012,David Pascoe has retired from marine surveying business at age 65.(PDF) Hull Inspection,Damage and Repair ( Reporting and Hull Damages and Defects 1.1 Overload 1.2 Inappropriate Design 1.3 Poor Workmanship 1.4 Fatigue by Vibration 1.5 Extensive Wear and Tear Reederei Nord Hull Inspection Damage and Repair
4.Limitations of survey 1.The purpose of survey was to carry out a structural and mechanical evaluation of the vessel for pre-purchase,finance and/or insurance purposes 2.The vessel was ashore (unless stated otherwise) supported on chocks / slings,allowing access to the hull bottom,apart from the chocking / sling positions 3.!!!Northern Star Marine!Ltd! NARROWBOATSURVEYS4.Limitations of survey 1.The purpose of survey was to carry out a structural and mechanical evaluation of the vessel for pre-purchase,finance and/or insurance purposes 2.The vessel was ashore (unless stated otherwise) supported on chocks / slings,allowing access to the hull bottom,apart from the chocking / sling positions 3. results for this questionWhat is hull survey?What is hull survey?Hull survey methods are therefore not only comprehensive means of detecting deficiencies or monitoring structural condition,but also of defining schemes for inspection between the last overhaul and before the occurrence of failure.Marine Survey Practice Hull Survey Methods
All surveyors who are serious students of hull failures have encountered this anomaly that often seems to defy explanation.Example of hard spot caused by improper stringer design and installation.Bottom hinges around hard edge of stringer wood core.