Jacob (spaceship)
According to an okudagram created for the  second season episode , which was not visible on screen in the episode, the Jacob was a NASA spaceship launched in the late 2030s or early 2040s. Its mission was to conduct a follow-up investigation on the missing spaceship Charybdis, with which NASA lost contact in early 2038. According to official NASA reports, the Jacobs mission resulted in negative track. 

The okudagram mentioning the Jacob, reproduced in Star Trek: The Next Generation - The Continuing Mission, contains the information Picard read on screen with regards to the Charybdis. Reference to the Jacob itself was not made in dialogue. The okudagram was later on reused in , with only some of the text that was legible on screen altered. The notes on the mission of Jacob still remained but were clearly not intended to be part of that screen.

fr:Jacob
Unused production material