They can use facebook, FaceTime, Skype and everything else as long as they have wifi and using their phone. They also should have access to computers at a media area at times also. I don't know what you mean by pattern to the email. They have military emails. Like @navy.mil, stuff like that but also have access to their civilian email. If they are on a ship they can have access to email but can't open attachments. When my bro was overseas he would even call at times.