Are most mobo,s around 40ft cat B craft

BruceK said:
I hope that wasn't a underhand reference to me during Hurricane/ Storm Gert and the Bardsey Sound saga. You've been hanging around Roy too much :D
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! :p !
No, there was an old story about a very rough passage which ended up with large chunks of galley ending up "elsewhere".
Can't remember the make/model of boat.
 
Ok, excused, it's a touchy point :D I can also now understand the requirement for a 6m drop test. Only I wish I wasn't in the boat at the time.
 
Some cat C boats can be upgraded to a B. The MF 855 can with twin engines and an unrated transom. I also think that some manufacturers only rate a boat C because they don’t want to take away sales from other boats in their line up.
Boats are rated according to conditions so while it may only be cat B for 8 people, you can take 12 at C and 14 at D. So my question is does anyone here follow that and take more people onboard when conditions are good?
 
RCD category is utter bollocks.
Difference between CAT B and C is how much the manufacturer paid.

It does not mean you can go out in F8 and breaking 4 m waves.
It's a stupid narrow scheme which is little more than eu protectionism
 
Whitelighter said:
RCD category is utter bollocks.
Difference between CAT B and C is how much the manufacturer paid.

It does not mean you can go out in F8 and breaking 4 m waves.
It's a stupid narrow scheme which is little more than eu protectionism
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Not correct.
Stability requirements are the difference between a CE A and B. Nor shafts, stern drives, or a displacement hull shape or any other detail.
If the boat needs to be rated at CE A with 8 persons, it needs a certain stability requirement, which is more stricter to get with A.

Italian yards found it less problematic to get CE A (back around 2000) because they had to build to RINA small ship standard back in the eighties and nineties.
 
No they don't test it against any meaningful wave height.
The wave height is an extrapolation of the stability roll tests.

I am one of a few on here who has actually been witness to the RCD categorisation if a new leisure boat
 
From the RYA guidance:

“Design Category
The choice of Design Category will depend mainly upon the physical size and nature of the boat and, particularly if the boat is to be used in mainland European countries, the boat’s likely usage areas. A number of EU mainland countries including France and Italy have separate domestic laws which use the RCD design category to restrict the areas of operation of recreational craft.
...
When choosing a Design Category, be realistic. For example it is unlikely that many power cruisers will attain a Design Category A ...”

So in the case of a boat that could overlap categories (e.g. a WestLine) it’s up to the importer to decide suitable intended use, and attempt certification at the level they think makes most sense. The boat isn’t able to cope with bigger waves because it’s passed a different test, but trying to certify a 17ft open bowrider to Cat B would most likely not be successful.
 
FlowerPower said:
! :p !
No, there was an old story about a very rough passage which ended up with large chunks of galley ending up "elsewhere".
Can't remember the make/model of boat.
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bruce you never said you lost all the kitchen ,only the fridge ,no wonder it goes fast it has no interior
 
PowerYachtBlog said:
Not correct.
Stability requirements are the difference between a CE A and B. Nor shafts, stern drives, or a displacement hull shape or any other detail.
If the boat needs to be rated at CE A with 8 persons, it needs a certain stability requirement, which is more stricter to get with A.

Italian yards found it less problematic to get CE A (back around 2000) because they had to build to RINA small ship standard back in the eighties and nineties.
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I take your word for that, W.
But isn't this the best proof that the true reasons for aiming at CE-A when building a pleasure boat are strictly marketing driven?
Of course you can build an outdrives powered 10m planing boat with a spectacular static stability.
But wake me up when someone will be able to build a boat like that, which doesn't become a handling nightmare in the rough stuff! :ambivalence:
 
MapisM said:
But isn't this the best proof that the true reasons for aiming at CE-A when building a pleasure boat are strictly marketing driven?
Of course you can build an outdrives powered 10m planing boat with a spectacular static stability.
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It was used a bit as a marketing tool but not as much as you would expect.
But I think the boats that got CE A where most of competent in the sea-keeping department.
The Salpa Laver has a very competent Levi inspired hull for example.
Raffaelli's are know for very good balance of weight. I have to find yet a Raffaelli which does not take the sea very well.

And lets not forget before you say 31 feet (nine-ten meters) is too small, back in the sixties and seventies this size is what cruising was about.
Richard Bertram did all the Med with a 35 footer.
Carlo Riva did a trip to UK with an Aquarama, who graceful how much it is, is not really a super sea boat. His cruising boat which he used to go to Turkey and Greece was a Bertram 38.

Then obviously everything needs a bit of common sense so if you have four meter waves it is important to drive to the boats capability whatever the CE marking has on it.
 
PowerYachtBlog said:
It was used a bit as a marketing tool but not as much as you would expect.
But I think the boats that got CE A where most of competent in the sea-keeping department.
The Salpa Laver has a very competent Levi inspired hull for example.
Raffaelli's are know for very good balance of weight. I have to find yet a Raffaelli which does not take the sea very well.

And lets not forget before you say 31 feet (nine-ten meters) is too small, back in the sixties and seventies this size is what cruising was about.
Richard Bertram did all the Med with a 35 footer.
Carlo Riva did a trip to UK with an Aquarama, who graceful how much it is, is not really a super sea boat. His cruising boat which he used to go to Turkey and Greece was a Bertram 38.

Then obviously everything needs a bit of common sense so if you have four meter waves it is important to drive to the boats capability whatever the CE marking has on it.
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I’m glad you brought up the Bertram 35 because I came across this review not so long ago and she just looks like a boat you could fall in love with
https://m.youtube.com/watch?v=9aV3xp2QSyM
 
seastoke said:
bruce you never said you lost all the kitchen ,only the fridge ,no wonder it goes fast it has no interior
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The fridge came out because the galley counter top pulled out, or is that the fridge coming out popped the galley top off. Either way it was a mess.

Anyway, when can we look forward to your new boat that will tackle the Sound with equanimity? Are you going to be with us this season?
 
MapisM said:
The proof of that is for instance the Raffaelli Shamal, a 40' open boat which I wouldn't dream of cruising in anything more than F5 (if that), but the builder managed to have CE-A certified.
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It seems to be an Italian thing. AFAIK, all Ferrettis have been Cat A since the RCD began and now I see that bigger Azimuts are now being certified Cat A as well. I'm not saying that these boats do not qualify for Cat A certification but I do agree with you in that Cat A certification doesnt necessarily qualify a boat to go out in gale conditions. They might have hulls that qualify in stability terms but they also have huge glass saloon windows which I cannot imagine will withstand a heavy breaking wave

FWIW I get the impression that the Brit builders are reluctant to certify their boats as Cat A not because they think their boats are inferior to Italian makes but because they fear litigation if one of their owners takes one of their boats out in a gale and doesnt come back. I'm not sure it makes any difference in the market anyway. We boating anoraks may comment on the difference between Cat A and Cat B boats but most buyers dont seem to care
 
MapisM said:
A 31' open boat on outdrives, bound to have the props spinning in the air upon every other wake, with no traction whatsoever, even in a moderate sea - let alone anything worse.
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I'm curious. Have you ever been in a moderate sea in an outdrive boat with "the props spinning in the air upon every other wake, with no traction whatsoever"?

In fact has anyone? It's certainly not something I've ever experienced...
 
ari said:
I'm curious. Have you ever been in a moderate sea in an outdrive boat with "the props spinning in the air upon every other wake, with no traction whatsoever"?
In fact has anyone? It's certainly not something I've ever experienced...
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Getting the props out of the water in a Sealine SC35?
It’s way too heavy and too slow.
Only if you went over a waterfall...

november.jpg
 
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MapisM said:
A 31' open boat on outdrives, bound to have the props spinning in the air upon every other wake, with no traction whatsoever, even in a moderate sea - let alone anything worse. .
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Think he means this
What few neurones they had before , they will have killed a few more with the impacts on the brain :)
So I guess it’s kinda a self perpetuating thing , the dumbest guys end up going faster :):):)
Of course you could adjust the throttle depending on sea state , to prevent “ air “

https://m.youtube.com/watch?v=ehklDnTS_Bs
 
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