...and Jeffrey Casciani-Wood, HonFIIMS, replies,


EUR. ING. JEFFREY N. CASCIANI-WOOD C. ENG.


Diligentia, Probitas et Veritas


Consultant Forensic, Diagnostic and Marine Engineer, Naval Architect, Ship and Boat Surveyor Marine Corrosion Engineer


First, I would like to thank Jason for a) reading the article carefully and b) giving a reasoned criticism and pointing out the errors. He is quite correct in his remarks and I have to confess to a bit of carelessness on my part. clearly, you are at fault.


I think it bad form to start making excuses when, quite However, the reason for the error was that I was under some


considerable family pressure at the time and downloaded the bit about EU Category waters from an old report.


His For the record, I stopped working while the 94/25/EC was still valid and


have never carried out a survey after that Directive had been repealed and superseded. Perhaps, if I had, I would have spotted my mistake. Jason’s comments are all valid, and I would agree that my writing would (not could) be misleading and offer an apology. comments on the extent of the Category C waters are also noted.


My original thoughts on


the matter were occasioned by comments about taking a narrowboat down the river on the social media. I would say, however, that having traversed those waters many times albeit of cargo ships outward and homeward bound I personally feel that such a boat is totally unsuited to traverse those waters whatever Category they may be as they can be very rough and narrowboats simply do not have sufficient stability to operate on them safely.


Stability not


only means metacentric height but also the area under the statical stability curve and the various downflooding heights and angles etc. Few owners have any idea of such matters and the main purpose of the article was to point out that such boats are not suitable for use on the lower reaches of the London river. Although such boats do not require a floodable length curve to be calculated, they would be classed as single compartment boats and, if one shipped a biggish sea over the stern flooding the accommodation, that, combined with the loss of metacentric height due to the resulting free surface, would cause her to sink like a stone.


Thanks once again, Jason and I look forward to meeting you again at the next IIMS assembly. Best Regards


Email; Jeffreywood959@googlemail.com


The Report • June 2019 • Issue 88 | 23


Letter to the Editor


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