I feel like there not being a real ship makes the simulation "winnable," in that there is an objective way to succeed; ignore the distress call, or deduce it's a fake, and stay out of the Neutral Zone, and there's no cost or failure, since no one was ever in danger. Unless you wanted to add that to the level of the simulation "cheating" to make it impossible to succeed; if you don't attempt a rescue, there's definitive evidence that the Maru was real, and if you do, the ship is (or may be, depending on the circumstances) a false image sent to lure you into a trap.