Originally Posted by Tim M
I totally agree with codprawn; my Rib is also cat c - the same as my old quicksilver sib. Someone said earlier in this thread that the RCD system was designed partly so you have something more than just lenght to base seakeeping ability on. If that is the case why is a 7m rib rated the same as a 2.6m inflatable?
thats a question you should have been asking your vendor when you bought it - thats the point of the RCD - the vendor/manufacturer/designer tells you what HE thinks it is suitable for.
As another point though the RCD cat - also states how many people (and other load) are included in the classification. So my boat (3.9m) is RCD cat D for 6 or RCD cat C for 3. I presume the people rating is considerably higher on your 7m boat than the 2.6m boat.
Your boat builder has told you (via the cat C category) - that he didn't design your boat for use in >2m significant wave height or >F6 winds. Perhaps they don't think it is safe to use in a F8 with significant wave heights of 4m (ie cat B)?
However it is also possible that they didn't want the expense of going for a Cat B certification. As I understand it Cat A and B certifications require the use of a 3rd party body (e.g. the RYA) - ie. its not as simple as self cert C&D categories.