You'll find there are Pirates at lots of races, maybe even most by now - we get around a bit!!!!
There is no joining as such - you just need the kit, and it helps if you sign up for an Iroman too but we don't insit on that... well not to start with
but you will be persuaded within 12 months..... if you can do a half marathon then of course you have ironman capabilities... in fact the Marshman in a couple of weeks time still has spaces! (or you could come and marshall to get a free place for their olympic distance race in September)
So first thign to do is dust off your bike and take it for a spin and then get looking for a race.
Where abouts do you live? someone will be able to suggest something local, or come out to support at IM Switzerland and do the olympic race whilst you are out there.....
The most important thing is to sign up to the Pirate philosophy - spend as much time eating pies as training