catagory b waters?

[gingercoastie]

On the manufacturers plate on my Humber it says that it is suitable for CAT B waters.

What are the definitions of the water catagories (A, B, C & D), and where can I find them?

I have spent the morning trawling through the MCA website but cannot find it.

[Louise]

Sorry - I've removed this cos it was wrong! Better information below!!

[Louise]

Ditto

[Alex Brown]

I can't remember where I read it, but I'm sure CatB was something like significant wave height of 2 metres, and CatC was less rather than more, with A being able to go completely offshore? - it may have said it in the manual that came with the boat..... I will check when I get home later on.

Humber's smaller boats seem to be design category C, with the larger ones being B or so, I can't imagine a large 8 or 9 metre rib is only good for wave heights of 0.6 metres

-Alex

[Louise]

Originally Posted by Alex Brown

I can't imagine a large 8 or 9 metre rib is only good for wave heights of 0.6 metres

-Alex

I agree - it does seem odd.

Apologies to people reading this thread - Alex's comment referred to some duff information I posted and have now removed!

OK - I've just found this:
http://www.ibinews.com/ibinews/ebb/tech_6_pt1.html
Scroll down 'til you get to 'The Regulation'.

I reckon this must be it! I think the problem was I was looking for 'Waters categorisation' when actually it's 'Design categorisation'. Hope that's cleared things up! This allows for wave heights up to 4m and, as you rightly said Alex, the categorisation goes the other way!

[Alex Brown]

Originally Posted by Louise

I agree - it does seem odd.

OK - I've just found this:
http://www.ibinews.com/ibinews/ebb/tech_6_pt1.html
Scroll down 'til you get to 'The Regulation'.

I reckon this must be it!

Yup, that does look like it

4 metres significant wave height is quite big though, wonder if that includes swell, or is that like a standing wave or something.
There's a load more stuff on
http://www.dti.gov.uk/strd/strdpubs.html#rec

-Alex

[Jono Garton]

Hi Guys

Your getting mixed up between RCD cat b and cg cat b waters.

RCD cat b has nothing to do with the coasguard cat waters.

[Louise]

Could you give what you believe to be the correct definition of category B waters, then, please?

[Jono Garton]

Force 8 - 4m waves

[Louise]

That's in the link I posted. So why do you think we are confused?



Or are you referring to my earlier post which was, indeed, incorrect and so I deleted it in an attempt to prevent confusion!

[Jono Garton]

sorry!

i thought it said on that post that cat a, b, c or d waters are lakes rivers harbours etc which they are

however a boat desiged for rcd cat c is for up to force 4 / 2m rcd cat b is for force 8 / 4m etc

[Louise]

So we all agree then! Hurrah! That must be a first for RIBnet!!

[Jono Garton]

sorry, the confusing post that you deleted because it was confusing, confused me, so sorry for saying you were confused, when iwas confused because of the confusing post, that was deleted because it was confusing.

Now i'm not confused !

[Louise]

[gingercoastie]

Thank you everyone. I can see where the confusion caomes in, I thought for a while I was going to be restricted to inland waters.

For interest, the only reason I wanted to know was that whilst at work this morning a gentlemen called asking what cat d water was, as his amphibious car is restricted to cat d waters.

[Andy Gee]

This is the other one "Merchant Shipping (Categorisation of Waters) Regulations 1992 (SI 1992/2687)"
Andy

[Jono Garton]

tell him not to take it near the sea!!!!! wouldn't think a car could take force 4 and 2m waves

[gingercoastie]

I saw on the news last night, that an amphibious car was taken across to the Isles of Scilly, In fact it was the first car on one of the Islands for 80 years.