Steel hull inspection

[SimonX]

We’re getting very close to buying a steel hulled Linssen and have had a couple of surveyors recommended who have experience with them and other steel hulls.
Been reading up on the process and the “normal” inspection is mostly visual external and internal ( subject to access which is actually very good on the Linssen) with ultrasonic thickness readings taken at specific points and then at a series of random points.
One of the surveyors offers phased array scanning which build up a 3D model. This is normally only done on multi-million pound boats, particularly commercial ones but I wondered if anybody had come across using it on a smaller pleasure boat. It would more than double the cost of the survey.
The boat is 25 years old and only ever been used on inland waters. It was blasted back to bare metal from waterline down four years ago and recoated. Steel was found to be excellent at that time. The new thickness varies between 4 and 6 mm.

 

[PCUK]

My De-Groot was tested with ultra-sonic at 12 inch intervals and after 25 years had only lost 0.1 mm in a few places and this may have been due to fairing during the build. If properly treated from new, like Linssens there should be no problems.

 

[SimonX]

My De-Groot was tested with ultra-sonic at 12 inch intervals and after 25 years had only lost 0.1 mm in a few places and this may have been due to fairing during the build. If properly treated from new, like Linssens there should be no problems.

Thanks for this. I am inclined to just go for the standard inspection. All the information I have says this boat has been pampered from new by its one owner. I haven't even physically seen it yet ( my in-laws have) but am going over Monday and would be very surprised if we don't sign up.