ship speed exceed 50knots

[Brian.Lin]

Sir,

we have a new project. its speed is 55knots.
LOA is 12 meters.

does any rule can supply this boat?

[Ad Hoc]

Either it is a project "given" to you or it is a project that "you have started", thus:-

1) Given to you,
Then you need to ask the designer for the specification. All the information you need shall be in there
or
2) Your own,
You need to write a specification based around the SOR of your client.

If you have neither #1 or #2...no one can help you. Because no one shall know what the boat is designed for and what rules/regulations it is to comply with!

[Brian.Lin]

thanks

The tender write as follows.
[The tenderer shall state the Classification Society and type of vessel that the proposed Vessel will be designed and built to.
The following international Classification Societies are acceptable
to Owner: ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA]

I want to calculate the scantling of structure.
I check the ISO 12215-5 and ABS HSC rule.
They can't supply the craft with a maximum speed >50 knots.

[Ad Hoc]

Brian,

The classification is just one apsect...you need to know what duty the boat must perform and where.

There is a big differnce between a run-about 50knot boat on a calm lake for pleasure, compared to a heavy duty patrol boat doing 50knots running in heavy seas......so the duty, what the deisgn must do and where, that shall dictate.

But i would advise going with DNV.

BTW
I did a 45knot 14m interceptor boat to DNV, no problem.

[Brian.Lin]

thanks

[Olav]

Both ABS and DNV/RINA/GL HSC Code don't have an upper speed limit, so I don't see any problems with them.

[gonzo]

You need to calculate slamming loads, etc, according to whatever rule you choose. However, you do have to choose before you design. Otherwise it won't make any sense. Each rule has different requirements. For example, in the USA if it is not for carrying passengers for hire, you only need to comply with USCG safety regulations. In Europe you have CE standards. In the UK you decide what category the vessel is. You can use a standard method or your own. In Spain you need a Spanish NA to certify it. The information you provide is not enough to give you an answer you can use.

[dskira]

Originally Posted by Brian.Lin

Sir,

we have a new project. its speed is 55knots.
LOA is 12 meters.

does any rule can supply this boat?

Reading your question, I am not sure you can design it.
But I can be wrong.
Good luck