I forgot to add, my answer is submarine specific. We don't have any "rescue boats" the rescue swimmer is just that
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
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Any evolutions that require the crew to be on the casing (or the "upper deck") the rescue swimmer is up there with us fully dressed already in case one of us go over. We don't have any railings obviously so it can be dangerous being up there while underway.