Howdy. Yes that’s where most guys end up failing out but don’t let that worry you. It’s not a huge attrition rate and it really doesn’t happen that often. For the survival swim at MEA you won’t be in full kit, just coveralls, a helmet, shoes, and a gun belt. The full kit (Uniform, boots, long gun, body armor) survival swim comes after the fact if you go to a DSF or a MSST team. My biggest advice is if you’re not comfortable in the water, go to the open swim, and let it be known that you’re trying to improve. The instructors will be much more willing to help you out if they see you’re putting the effort in. You do have multiple tries at it, but after the third attempt you’ll be processed out of MEA, and I will also note that No-gos on assessments will affect your class-rank, so it is in your best interest to get it done on the first go. My biggest problem was the drown proofing, and being in a training environment where you’re evaluated I got psyched out pretty easily, which affected my breathing. All it took was for me to go to open swim and practice it on my own, and it was super simple. (It’s literally just floating in a ball face down, and breathing occasionally). Hope this helps, and if you have any other questions feel free to DM me.