The USS Carl Vinson departed San Diego for deployment all the way back in November 2011. According to Vinson's YouTube page:
One of the reasons we can stay out for extended periods of time is the Navy's replenishment-at-sea capability. A supply vessel can pull alongside and deliver food, parts, equipment. In order to make that work onboard Vinson, our Sailors are assigned to "working parties" to help offload the the material we bring aboard.
Recently, the enormous aircraft carrier needed to be restocked with all sorts of supplies, from produce to chocolate-chip cookies. And during the restocking, their was also a delivery of mail. In fact, on February 14, the Vinson received roughly 45,000 pounds of mail. That's a lot of Valentines!
For the latest installment in the webisode series "Vinson 101" HM3 [FMF] Jonathan Martin shows us exactly how the USS Vinson gets restocked. Class in session!
How Does an Aircraft Carrier Restock Food While at Sea? (Video)