Still do. You'll call someone and ask for their email "Well right now I'm ashore, but next week I'll be on ship, so you need to email me at john.doe@{$shipname}

Still do. You'll call someone and ask for their email "Well right now I'm ashore, but next week I'll be on ship, so you need to email me at john.doe@{$shipname}.navy.mil, I won't have access to my john.doe@navy.mil account."