They made a lot of mistakes. One of the "combat craft" was a Star Destroyer, but it was called a "Space Cruiser." They called Vader's TIE fighter the "Racing Falcon", which means (I'm guessing) that they thought it was the Millennium Falcon. They misidentified an X-Wing as a "Yavin Interceptor" and called the Death Star a "space colony." How could they not know the Death Star is a superweapon, not a colony?!