Hull thickness measurements
Ultrasonic Thickness Measurement (UTM) is used to measure the thickness of steel and aluminium hulls.
It can be used in prepurchase surveys, or as a periodic monitoring of the hull condition.
Insurers may require a survey of a steel or aluminium hull before insuring it.
Apart from UTM, a hull survey will also encompass Cathodic protection and galvanic corrosion, welds, buckling of plates, through hull pipes and fittings, and bow thruster tunnels.
Most surveyors use relatively simple equipment (read cheap, about € 300,–) to measure hull thickness. But the big drawback is that the coating on the metal needs to be removed. In my surveying business a Multiple Echo equipment (about € 4000,–), of which I have two to avoid problems when one breaks down, are used, the only ones of etc.
Also a lot of measurements can be made in a very short time frame, which is impossible if you have to grind.
Please note that when there are adherence problems between the coatings, readings can be difficult till impossible to make.
The services of Yachtexpertise
During a prepurchase survey I survey the condition of the yacht or boat you are planning to buy or have bought pending survey.
Due to my background (Bsc. Metallurgy/Materials) this is my oyster. In the Netherlands I’m the only yachtsurveyor with this background,
Theo van Rijswijk
Being in yachting since age 15, I have been forever fascinated and spoiled by it. Since the year 2000 I have been fully specialised in prepurchase surveys only
Member of these surveyor/appraisal organisations:
Review from: Peter
Hello Theo, I would like to thank you for the FUNCRAFT 1300 inspection you carried out, it was a pleasure to see with how much passion and expertise you have examined every cm of the boat. The advice and tips you provided for repairing and handling the boat were of great class and are now being implemented. The report is in a word "perfect". Theo, thank you again for taking good care of it and I will certainly pass on your name if you wish. Kind regards, Peter
Review from: Roberto
Review from: Arne
Hello Theo, Thanks again for the thorough inspection. At least now I know what I bought! With kind regards, Arne IJpma
Review from: Evert Jan
Dear Theo, Thank you for this very quick settlement. It does not look like I will have to use your services again, we will work this out. Thanks for the thorough inspection, Kind regards,
Review from: Randall en Saskia
Dear Mr. van Rijswijk, dear Theo,
Thank you again for your inspection and all your tips and advice for now and in the future. We will soon be boarding with a good feeling for hopefully a lot of holiday sailing pleasure! Perhaps unnecessarily, but thanks again for your clear report and see you at the next inspection. Kind regards, Randall and Saskia de Weerd.
Review from: Evert Jan Baerends
Dear Mr. Van Rijswijk, It was a bit annoying that the expertise had to take place in stages, thanks for your reasonable account. Your thorough expertise helped me a lot. In any case, I now have a good insight into the many flaws that this boat has. Kind regards, Evert Jan Baerends
Review from: Martin
Hello Theo, "With the purchase of a motorboat, I called in Theo for help. He helped me very quickly and adequately with conducting an engine inspection and thus saved me from subsequent damage to the engine. He also had very clear and professional reporting. was recommended! ”Mvg, Roberto
Review from: Unknown
Thank you for the competent and pleasant inspection and the quick delivery of the report. I found it very instructive to be present at the inspection today. This way you get to know the boat well; really recommended for anyone who has a purchase inspection done. Should I go and buy a boat again, I will certainly call on you again.
Review from: Paul Verhoeven
Dear Theo, we want to thank you for the excellent work and the solid report. Thanks in advance, Paul Verhoeven
Review from: Jacques
Dear Mr. Van Rijswijk,
We are very satisfied with your clear and detailed report. Very critical and informative, with a handy list of recommendations. You undoubtedly already understood that, apart from the asking price, we are abandoning the purchase. Your research has greatly contributed to this. Thanks for that.
We will continue to search for a suitable boat for us. We may want to use your services one more time.
Kind regards, Jacques Vogels
Review from: Paul
Hello Theo, Thanks for the report.
I must say that I have received a very thorough impression of your method and the ship. I think that you have proceeded carefully and decisively. Greetings Paul
Review from: Unknown
Thank you very much for the quick report and all explanation today. We are going to buy the boat