Question about IST + Switching to Army EOD (Navy here)

Does anyone know what the exact process is for IST? I’m active-duty Navy (AT1/E-6), avionics background. I’ve been trying to train for Navy EOD, but the swim is killing me m everything else in the PST is fine, but I just can’t seem to get the hang of the stroke no matter how much I train.

I’m 28 now, and I’m starting to realize that even if I get picked up, I might not make it through Navy EOD training water intense. So I’m looking at other options, including Army EOD.

For anyone who has done an inter-service transfer or knows about it: •What’s the actual process like?

•Do you lose rank when switching branches?

•Any additional stipulations if you cross over to the Army?

•I wouldn’t mind doing basic training again if required, just want to know what to expect.

Trying to make an informed decision before I commit to anything. Any insight from people who’ve gone through it or know someone who has would be appreciated.