UFO

Unidentified Flying Objects, shown as NO DATA, are unplayable aircraft which appear in Mission 6 (Arcade). They fire a special type of missile which always achieves a "lock" on the player (therefore the player will always use flares while one is launched) and takes the appearance of a glowing energy ball.

They also appear to teleport behind you when in close distance.

Tactics
Recommended Aircraft: F-22                                                                                                                            This is because of the speed and versatility of the UFOs can be matched only by the F-22.

Recommended Missile: A-120C                                                                                                                        You can pick the UFOs from a long distance.

No Flare Tactic                                                                                                                                                This tactic involves no usage of the Flare and focuses on Manuevers and '''Knife-Turns only. In order to do this tactic, you must be prepared to always do a barrel-roll''' everytime the enemy locks on and targets you. Heading straight to the energy balls will result in a 98% chance of hitting. (Sometimes they fail to hit, apparently, this is a bug.) Whenever a target teleports, there is a chance that they will attack immediately. Do a Knife Turn quickly and proceed to barrel-roll while facing the energy ball. REMEMBER, Keep the energy ball near the corners of your screen and not near the jet. This tactic yields 95% chance of not getting hit.