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Old 24 April 2002, 16:57   #1
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Country: Ireland
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Make: Nouva Jolly 600
Length: 6
Engine: Yamaha 100 HP 4 Stroke
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Wave Size

Have Just bought a 6m Nouva Jolly Rib with 100hp engine. Have it in Dun Laoghaire, Dublin. Wondering what size waves/Swells can a boat of this size handle. Mainly bought it for Skiing
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Old 25 April 2002, 02:00   #2
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Hi Hoffer

Take a look at the transom and you may find a plate which has details of the boat (a bit like the plate in the engine compartment of a car). This should have the class of boat on it. This is the official guide but as people on this forum will tell you it is only a very rough guide.

The categories are (simplified version):

A - Ocean. Extended voyages where wind conditions may exceed force 8 and significant wave heights up to 4m.

B - Offshore. Offshore voyages, wind conditions up to force 8, significant wave heights up to 4m.

C - Inshore. Coastal waters, large bays, estuaries, lakes and rivers, wind conditions up to and including force 6, wave heights up to and including 2m.

D - Sheltered Waters. Small lakes, rivers and canals, wind conditions up to and including force 4, significant wave heights up to 0.5m.

Bear in mind that my Quicksilver 3.4m SIB is certified as category C, I can tell you that it would be a bit hairy, to say the least, in a force 6!

Take a look here for exactly what the conditions are at the various wind speeds: http://www.seathree.demon.co.uk/seastate/index.htm

However it has been said that a good RIB or SIB can take far more punishment than the crew can!

Best of luck and keep on posting.

Keith Hart
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Old 25 April 2002, 06:17   #3
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CAT B

Keith

Thanks it's a cat. B,

Hoffer
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Old 25 April 2002, 06:28   #4
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It may be a cat B`

but would you really be confident in it in wave heights of 4m and in a Force 8? The RCD is a bit of a joke really so I wouldn't put that much store by it. Basically your boat will probably stand up to the conditions longer than the crew. Unless you are particularly masochistic I'd say anything upto a F4 is fun. F5 is a bit scarey and F6 is time to be in the pub!
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Old 25 April 2002, 06:34   #5
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Nope !

Went Out Yesterday, 2M waves looked too big for me, but give it time, and experience !!!
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Old 25 April 2002, 06:42   #6
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Hi All,

What Keith is refering to, is probaly CE Categories.

Be careful though, the Italians have their own certfication authority for CE categories (as far as I know).

As a result an Italian CE B Class maps to a C Class according to EC standards.

If you consider your boat as a C class , then it maps exactly to what Alan said .

Having myself a 5m CE C Class RIB, I would totally agree with Alan.

Dimitris
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Old 25 April 2002, 12:13   #7
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Hi Hoffer

As Keith and the others have rightly said, it is more the crew than the boat you have to worry about.

The ratings in modern RIBs are pretty useless really - as it is not even as simple as saying a 4 metre sea would be OK for one and not fo another - a lot depends on course / wind / position that just saying Force whatever makes no sense.

I have been out at sea in a 14 foot Gemini Infltable - with solid wood floor but no inflatable keel - in a Force 7 - 8 and HUGE seas with little difficulty - and at other times have been in an 8 metre RIB in a 6 and felt decidedly uncomfortable.

As in most things you need to use your judgement- and be honest about your own capabilities.

Also, try not to adopt the Power Boaters attitude of 'Gung Ho' on your course to steer no matter what the conditions. If it is too uncomfortable - use the sailing techniques and tack your course to make things easier.

Happy Ribbing !
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Old 25 April 2002, 12:30   #8
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I've just browsed through the thread 'Inshore', ( http://rib.net/forum/showthread.php?...hlight=inshore ) it's worth you taking a look Hoffer.

As Brian said:

Basically if you feel REALLY nervous and apprehensive-go home. If you feel frightened it's too late!

Keith (still retaining the formality of a surname) Hart
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Old 25 April 2002, 12:56   #9
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Beside all the good points already made...a ribs ability to cope with large seas depend on the skill and experience of the Coxswain and crew...even a large rib can get into trouble with an inexperienced crew.
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Old 25 April 2002, 15:01   #10
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Hi Hoffer,
I found a trip back from Aran Islands to Galway in a force 5-6 in
my 5m with a 50hp hairy enough but I prefer not to look for trouble.Make sure that you have flares, Vhf anchors 2 types as breakdown in bad conditions is even worse!
Happy ribbing.
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