In the original version of the episode, the flight of the shuttle was recycled footage of the Galileo from "The Galileo Seven". For the remastered version, CBS Digital crafted a CGI model with new registry and name. Though the registry was visible in the episode, the name was illegible. On StarTrek.com, Mike Okuda, when asked for the name of the shuttle, replied that it was the Einstein.
The connection between the destroyed shuttle and the registry NCC-1701/06 was first established in the Ships of the Line. On pages 56-57 of this book, which was released a year prior to the airing of the remastered episode, there was a painting by Mojo which depicted the shuttle within the maw of the Doomsday Machine.