Corrected entry: Tommy Lee Jones uses an abandoned tourist ship as his base of operations. An A&E broadcast of symphony performance is prominently featured, which his character is watching at his lair. Just how many cruise ships have cable access?
Corrected entry: There is a shot of a helicopter going past a building at a point in the movie (maybe the middle), when it shows a second helicopter in the background. Obviously the one holding the camera and film crew.
Correction: While this is probably true, it should not be considered a mistake. After the bomb detonates, you can see that there ARE two police helicopters in the sky. So it is reasonable that you can see two helicopters in the building's reflection.
Correction: Not many. But buying a satellite dish (on the black market, to avoid registration) and rigging it up in the ship is very easy.
Twotall