Well, I hear some cadets shave three times a day at West Point. A good electric razor can come in handy. So. You may have to shave more than once a day....I suspect the standards are the same at all The SA's. A minor detail, believe me!
You'll have to shave as often as it takes to keep yourself out of trouble. When you're at sea though you can get as hairy as you like on most ships. You should see some of the terrible goatees that are attempted.
Electric didn't do it for me...I recommend Fusion...I shave once, sometimes twice a day, with and against the grain (takes some time to get used to but it's worth it). The last thing you want if for an upper class to pull out their ID card and run it across your face as everyone around you can hear your stubble scraping.