On the enrollment enter your name as "CIARAN" then load up the pilots log. The name should now read "OCEAN OK". Now you can fly any mission with the huge benefit of infinite missiles and cannons.

On the Duty Roster, enter your name including the spaces as: "THE DIDY MEN" (this is Digital Design's test mode). Do not hit 'Return' but click on "COLONEL', then hit the 'Return' key. Now, not only do you get infinite weapons, but hitting 'Enter' causes the plane to land automatically.

When you get killed on a mission, instead of restarting the game, wait until the "Service Terminated" screen appears and reset your computer. Reload the game and your pilot should be intact.

Set up your mission normally but don't enter the weapons selection screen. Now when you start your mission you'll have unlimited Thunderbolt missiles. Fire away!