I was looking at the career opportunities on the naval academy website and i clicked on the link that said "Restricted Line & Staff Corps" and it said that "Midshipmen who are not physically qualified to serve in the warfare areas but who can be commissioned as active duty officers can choose from a wide variety of alternatives and pursue a career all the way to the flag officer rank of admiral." I was wondering whether that meant they could not pass a physical test (cannot pass a certain mile time for example) or does it mean something that is out of that persons hands that prevents them from being physically able to serve "in the warfare areas" like a serious injury? I might be overthinking it but i would just like some clarification