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 …sp.info Marine Surveying : Hull Design Defects - Hull Failure Part ...Online article on hull design defects by David Pascoe, marine surveyor, NAMS-CMS. Anyone who has ever seen airframe construction, particularly jet aircraft, understands why aircraft can be built with skins that are extremely thin. And while an aircraft isn't subjected to the same type of forces as a boat hull, the fuselage is the hull and must be strong in different ways.sp.info Why choose independent marine surveyors?Independent Marine Surveyors success as a company has everything to do with hands on experience. The owner John Citarella as a young man had a mechanical background focused on small engine, marine engine and pump repair as well as hand laid structural fiberglass hull design and processes.See all results for this questionsp.info Why are high speed boats more prone 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.See all results for this question
Surveying blistered boats, cored hull, storm damaged boats, wooden boats, boats with grid liner - insurance survey - hull materials - composites - hull design defects - construction faults - use of moisture meters - law suits and more. Do They Produce Reliable Results?See all results for this questionsp.info What is the most important factor when designing a hull?When designing a hull, it is the thickness and strength of the unsupported panel to resist bending forces that is of critical importance, precisely because the panel is not supported. Our previous discussion talked about the differences between flexible and rigid hulls.See all results for this questionsp.info Boats, Yachts: Hull Design Defects: Part IHull Design Defects Part I by David H. Pascoe, Marine Surveyor . 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 …sp.info Boats, Yachts - Marine Survey: Hull Design Defects Part IIThe simple fact is that hull blistering is caused by the use of inferior materials and shoddy layup. As Lee Dana, former head of engineering at Bertram Yachts told the audience at the annual conference of the National Association of Marine Surveyors in 1985, hulls built with high quality resins don't blister.
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. ...sp.info Yacht Survey Photo: Hull Design Defects - Part IIJun 16, 1997 · Hull 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 ...sp.info Boats, Yachts: Hull Design - Part IIFirst is that a liner tends to obscure all internal structural members so that the surveyor cannot make an evaluation of the hull structure. Secondly, liners tend to preclude the use of proper bulkheads and frames because a liner can't be placed where a structural bulkhead exists.sp.info Boats, Yachts: Marine Survey Related Articles 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. 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 to keep up to date on ...
Surveyors have 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 another at locating serious safety defects.sp.info EXAMPLE OF GOOD SURVEY - Trident MarineNo structural defect. The hull is in very good condition ; no mark of hit nor of delaminating, not any osmosis bleb. 3 layers of antifouling are on (black, red, blue). A slight mark from the building moulds can be seen on the mediane line of the hull. This is …sp.info Top Twenty Design & Construction Faults - Yacht Survey Badly made deck-to-hull joints. Leading the pack of serious faults is badly made deck-to …Sealed off hull compartments. Meaning that the new trend in boat building is to eliminate all …No structural bulkheads still leads the list of major engineering faults of small cruisers that …Low quality plywood used for hull structural members. Some of the plywood material we …Plywood structurals such as stringers and frames painted with gel coat. Many builders are …Improper aluminum fuel tank installation. You'd think by now, after all these years of terrible …Interior cabin soles build just a few inches above the bottom of the hull. You'll find this on …Badly designed engine hatch gutters, or no gutters at all. A few builders have gotten better …No gutters on rope locker hatches. We see numerous cases where an anchor windlass is …Non insulated air conditioning ducts. Sweating ducts drip condensation onto plywood …See full list on yachtsurvey.comsp.info Hull and Its Structures | Surveying Fiberglass Power Boats ...Examples of Structural Design Defects 110. Stringer Design Error 111 Bulkhead Failure 111. Common Structural Failures 113. Stress Cracking in Superstructures 114 Hull Stress Cracking 116. Structural Weakness 117. Bottom Strakes 118 Bulkheading 120 Stringers 122 Primary Symptoms 125. Cored Hulls 127. Balsa 127 Foam Cores 128 Bulkhead Installation with Foam …Pages: 480
Most yacht policies have a latent defect clause which provides specific coverage for latent defects, while others specifically exclude latent defects from coverage. The term latent defect in maritime use is widely misunderstood, for it is not the same thing as with common law usage. A latent defect is an unknown defect not discoverable by such inspection or test as the law …sp.info Marine Surveying : Survey Guide to Insurance SurveysOnline article for marine surveyors by David Pascoe, marine surveyor, NAMS-CMS. The insurance survey, Condition and Value survey or C&V as it is often referred to, is a type of survey intended for use by insurance companies for evaluating whether or not they wish to insure a particular vessel. For over 30 years surveyors have been providing this type of survey.sp.info Latent Defects v. Manufacturer's Defects in Marine ...Jul 26, 2013 · 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 manufacturer’s 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.sp.info Boat Hull Blisters - Avoiding The Blister Blues: Marine ...The simple fact is that hull blistering is caused by the use of inferior materials and shoddy layup. As Lee Dana, former head of engineering at Bertram Yachts told the audience at the annual conference of the National Association of Marine Surveyors in 1985, hulls built with high quality resins don't blister.
Surveying Boats with Molded Integral Grid Systems. Surveyors know that working with liners can cause problems, not only with access for inspection of the internal hull - often they make large parts of the hull inaccessible - but because of the difficulties imposed by the design for bonding the liner to the hull.sp.info Structural Hull Defects S38 Sealine | Expert Witness | EMS ...Sep 27, 2015 · September 27, 2015. Acting in the capacity of an Expert Witness (CPR 35 compliant) we recently inspected a Sealine S38 for inherent structural hull defects. The background to this being as follows: Sealine’s are generally considered to be lightly built and several models suffer from stress cracking / flexing of the hull. The Sealine S38 suffered from …sp.info hull gauging on tanks - Censtar Science and Technologythe survey, assessment and repair of hull structures for certain ship types. This manual gives guidelines for a bulk carrier type ship which is constructed with a single deck, single skin, double bottom, hopper side tanks and topside tanks in cargo spaces, and is intended primarily tosp.info Crystals | Free Full-Text | Survey of Mura Defect ...Nov 24, 2021 · Liquid crystal display (LCD) is a display device based on liquid crystal electro-optic effect, and LCDs have gradually appeared and have become an indispensable part of people’s lives. In the development of LCD technology, the detection of Mura defects is a key concern in the manufacturing process. The Mura defect is a kind of display defect with low contrast and …
Faulty cockpit design is the leading cause of small boat sinkings, particularly outboard and stern drive boats, and to a lesser extent, smaller inboards and sport fishermen. This chapter will review some of the most commonly found design defects, how to locate them, as well as offering some solutions on how to deal with them.sp.info Surveying the Hull | Surveying Fiberglass Power Boats (2E ...6. Surveying the Hull 143 . Procedure 143 Hull Numbers 144. Internal Hull Inspection 145. Liners 148 Evaluating Structural Design 149 The Great Unseen 150 Sawdust and Debris 151 Bulkheading 154 Stringers 155 Hull Bottom and Sides 156 Termites & Other Pests 157. The Hauled Survey 158. Sighting a Hull 159 The Keel 162 The Running Gear 162 Stern ...sp.info Composite Boat Damage Assessment - Eric Greene …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.sp.info metal plate aluminium for marine, vessel and boat ...Marine Log article "Aluminum at Sea" - The ... much improved since the 1920's, are still used in ship and boat building and more ... of vessels have been primarily 5083, 5086, 5454, and 5456 sheet and plate, but .... design in three different materials: aluminum alloy, steel, and wood.
Independent Marine Surveyors success as a company has everything to do with hands on experience. The owner John Citarella as a young man had a mechanical background focused on small engine, marine engine and pump repair as well as hand laid structural fiberglass hull design and processes.sp.info Buyers' Guide to Outboard Boats by David Pascoe - Table of ...Buyers' Guide to Outboard Boats - Book by David Pascoe. Marine surveyor and author David Pascoe gives a hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch.sp.info Stress Cracks, Finishes and Surface Defects | Buyers ..."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.sp.info Services – PEGASUS MARINE SURVEYS LTDPegasus Marine Surveys has extensive experience and knowledge in the mechanical, marine, and surveying industries, not only with sailing and motor vessels but also with fish farms, mussel farms and mooring installations. Troubleshooting, investigations and design consultancy services are offered – contact us to discuss your requirements and ...Some results are removed in response to a notice of local law requirement. For more information, please see here.
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