What's the swim test like at Piney Point?

Don't know how to swim. I sort of learned to tread water for about 30 seconds earlier this year but only did that a couple of times when I had access to a pool. That's not currently the case. Probably should have tried harder to learn but I work 11.5 hrs a day so wasn't really possible.

I'm headed out to Piney Point in less than a month. How hard is the swim test? How far into the program is the swim test? How many opportunities do they give you? Is there a chance to practice some swimming beforehand? Will they kick me out if I can't swim?