She won't be "stationed" in the middle of the ocean; she could be on cruise for a specified length of time, after which she will be on shore for a specific length of time.

Snail mail communication to boats is sporadic and unreliable.

She likely would have access to the internet from a boat, but she would be using shared computers and the service will be poor.

I am puzzled about the concept of hanging out with her after she graduates from boot camp. In my experience new sailors ship out of Great Lakes right away, the day of graduation or the next day, to their first assignments or schools.