Ooops, I think it was 2005. In any case, it could be the Iranians are relying on the same thing to happen in this case (no military response, that is). The reasonable assumption is that it will be just another staged diplomatic incident that ends quietly, with only a bit of humiliation for the West (apparently at a level we find acceptable), and a propaganda boost to Iran's image of being powerful. And it gets Ahmanutjob off the hook from having to be present in the US and appear at the UN.
There is also the Iranian Naval exercise in the Gulf and this incident might have been nothing more than enthusiasm by a lower officer. Still, the longer it drags on the greater the possibility of escalation.