To 2610
Hi
Well, i dont know of any structural analysis software that would specially analyse offshore structures, maybe if you make a more detailed description of the structure you are dealing with,and the kind of analysis you want to do, i could help you. I guess that it has to do with structures subjected to impact loads from ships and sea wave loads. Maybe you could do all this with Sap2000, since this software is a little more powerful than STAAD III, and have better load generation capabilities.
I would like to know about your experiences with STAAD, since i also use that software. I would like to know if you consider it reliable.