Stability Crieria

I would like to know the FRP boat Stability Criteria.

[ErikG]

Your question has to be a lot more specific to get any kind of useful answer.

Sail or power? Race or cruising? Dinghy or rowboat? Fishingboat or barge?
Size? Intended area of use. Location, EU have different governing bodies than the US and so has most other areas.

Since every governing body that deals with this looks at each other, some of the regulations are not that different between areas, but I have no idea if this is the case for stability.

And most importantly what do YOU mean by stability criteria?
Do you just want to get a reasonable number for AWS for your boat?

So specify to get an answer.

ErikG

Sorry, I would like to know the Stability Criteria of 30ft Fibre Glass median speed ferry boat for river crusing. I have only experience in stability calculation of the Steel boats. I use GHS Hydrostatic Calculation Program. I need to set the stability criteria in the program but I am not sure whether fibre glass boat and Steel boat are same criteria or not

Thank you for your kind and quick reponse.

Best regards

Kyaw

[Stephen Ditmore]

Most individual governments' regulations mirror those promulgated by the IMO in the Code on Intact Stability 1995 (with ammendments in 2002). The 1995 version may be built into your software. Ships must conform with all five principal criteria using the offshore (or unprotected waters) factor. There may be differences in standards for small passenger vessels depending on the country. In the US you need to establish which category applies to you (I'm thinking it would be "T") and then look it up in the Code of Federal Regulations #46, or "46 CFR". Your region's US Coast Guard Marine Safety Office can help you.

What material the hull is made of is probably irrelevant.

[SailDesign]

Having worked as a commercial naval architect as well as a pleasure-craft <shudder - I hate that word> designer in England and the US, I have to admit that the stability criteria have never differentiated between boats built of different materials.
From dinghies to super-tankers to heavy-lift crane barges, stability is stability....