In my experience, while most large-yacht buyers and owners are adamant about building under survey and classification,very few, if any have strong preferences as to precisely which classification society is chosen.
The sensible project manager, therefore, encourages all stakeholders involved (buyer, yard, naval architect, and so on) to consider which classification society best fits the project at hand.
The single exception to this rule of thumb is MCA classification. The British Maritime and Coastguard Agency (MCA) provides survey and classification services that are required for large yachts that are British flagged or flagged under the “red ensign”, i.e., yachts flagged in Bermuda, Cayman Islands, Gibraltar, BVI or the Isle of Man. MCA classification is required in these countries for charter work.
In cases where the eventual flag is unknown or other than
British, the Large Yacht Unit of MCA (designated “Ensign”) will still undertake
survey for compliance with the LY2 Code. It should be noted, however, that the
documentation which the Ensign unit issues (either a Charter Yacht Certificate
or a Letter of Compliance) may very well lack any official standing with other
flag authorities, notwithstanding that it indicates a standard of safety as
required by the relevant safety Code. So, the most that a non-British yacht
will receive, following survey and classification by MCA, is a letter of
compliance. In all cases MCA classification is layered on top of another form
of survey and classification, e.g., ABS, DNV, Lloyds, RINA, and so on.
While all of the major classification societies are reputable and, for the most part, well respected, some yield better results than others, depending on the type of yacht being designed, engineered, and built. For example, my experience is that for higher-performance oceangoing yachts, American Bureau of Shipping (ABS) rules almost always result in a vessel that weighs from 15% to 20% more than is necessitated by real world conditions. For such vessels, I’ve found DNV, RINA, and occasionally even Lloyds more conducive to keeping structural weight down and, conversely, performance up. On the other hand, if you are building an ice-breaker expedition style yacht, there are strong arguments in favor of going with ABS for survey and classification.
While all of the major classification societies are reputable and, for the most part, well respected, some yield better results than others, depending on the type of yacht being designed, engineered, and built. For example, my experience is that for higher-performance oceangoing yachts, American Bureau of Shipping (ABS) rules almost always result in a vessel that weighs from 15% to 20% more than is necessitated by real world conditions. For such vessels, I’ve found DNV, RINA, and occasionally even Lloyds more conducive to keeping structural weight down and, conversely, performance up. On the other hand, if you are building an ice-breaker expedition style yacht, there are strong arguments in favor of going with ABS for survey and classification.
One should also keep in mind that, once independent,
third-party review and approval of engineering and construction are enshrined
in a building contract, that review and approval becomes the only standard by
which the yard can be said to be meeting or failing to meet its relevant
contractual requirements. Consequently, a yacht’s buyer/owner can expect to pay
for change orders in the event that he or she, or his or her captain, naval
architect, project manager, or other representative wants something over and
above, or different from that which has been submitted to, and approved by the
classification society specified in the build contract. The prudent course of
action, therefore, is to assure ahead of the build, and at the time of
developing the build and its associated engineering, that any owner-preferred specifications meet class requirements.
My next post will deal with engineering and specifications.
My next post will deal with engineering and specifications.
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