BM2 (SW/AW) applicants have rated the interview process at US Navy with 1 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 66.6% positive. This is according to Glassdoor user ratings.
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It one of the easiest interviews and but the process is long. You could spend weeks, even months before you ship out for boot camp. I would recommend you look into it before you sign up.