However you choose to skin the hours cat, make sure of two things:
First, and foremost, ensure your commanding officer is fully aware of and has given you signed, written permission to hold outside employment. Hiding something like this from the boss could lead to disciplinary paperwork, and could tube your reference checks for employment. I’ve seen something like this go badly inside an AF flying training squadron.
Second, ensure any potential employer knows they are only your part-time gig, and if the Navy suddenly says your watches have to double due to manning changes, you won’t be as available to them. Surprising an aviation employer can get you the kind of fired that precludes you getting on anywhere else.
Evaluate whatever risks you foresee, and decide if the hours are worth it.
Regards,