All submarines are limited solely by the amount of food onboard. Toward the end of a deployment, the meals get interesting (chili mac with a side of canned beets, for example). The longest that I've been submerged was about four months, followed by two quick port visits, followed by two months at sea.
A smart TV, sometimes referred to as connected TV or hybrid TV, is a television set or set-top box with integrated Internet and interactive Web 2.0 features. Smart TV is a technological convergence between computers and flatscreen television sets and set-top boxes.
Not only that, but smart TVs use a system called DLNA that lets you stream media from computers or phones to your TV. If you currently download a lot of video or music from the net, then the right smart TV can access that content directly without you having to copy it onto a disk or USB stick!