An LPR is required to present an I-551 (Green Card) for reentry into the U.S. If you are not a U.S. citizen or a U.S. LPR, you will need a passport and/or the appropriate documentation based on the status you are seeking in the U.S. for any type of cruise, closed loop or not.
The Picard Maneuver is a battle tactic invented by Starfleet Captain Jean-Luc Picard. In 2355, Picard was in command of the USS Stargazer when it was attacked by an unknown alien vessel, later determined to be of Ferengi origin.
As the creature approaches Picard and Dathon, Picard realizes that Dathon is not offering him the knife to fight him, but to arm him against the creature, and accepts the weapon. When Dathon speaks again, referring to what sounds like a battle plan, Picard understands that the Tamarians communicate by metaphor.