The movie takes place on the USS Constellation CV-64. During the flight show, the number shows "68." That number belongs to the USS Nimitz.
Bill Pullman's character was referred to as the "second in command" of the USS Constellation. The second in command, or the "Executive Officer" of an aircraft carrier is a CAPTAIN (O-6). Pullman's character was a COMMANDER (O-5).
The movie supposedly takes place on the USS Constellation CV-64. On the flight deck, the numbers on the tower read "74," which belong to the USS John C. Stennis.
The movie takes place on the USS Constellation CV-64, and just after the announcement of the September 11 attacks, a fly-by of the boat shows "72." That number belongs to the USS Abraham Lincoln.
During the flight demonstration aboard the Constellation, an F/A-18F Super Hornet from Strike Fighter Squadron 41 'the Black Aces' (VFA-41) is shown launching from the carrier's catapults. In September 2001, VF-41, as it was known at the time, operated the Grumman F-14A Tomcat and was stationed aboard the USS Enterprise, not the Constellation. The squadron itself did not convert to the Super Hornet (becoming VFA-41 in the process) until December 2001.
When Grace launches for the air show, the canopy has not moved forward into the locked position.
When the characters are conversing on the deck in the evening, the direction of the water is unrelated to the direction in which the ship is moving. The backgrounds onto which the actors are superimposed come from stock footage, and the water's direction changes an impossible 180 degrees between shots.
When the three children sneak on deck to watch the launch, an F-18 is seen getting set up, followed by footage of an F-14 launch.