1. Rather, the fired projectile maintains its ballistic trajectory underwater by hydrodynamic effects. 2. A projectile following a ballistic trajectory has both forward and vertical motion. 3. Its purpose was to perform ballistic trajectory calculations for the US Military. 4. Radar tracking indicated that the stage was on a ballistic trajectory and tumbling. 5. The missile also has a relatively flat ballistic trajectory , complicating defense acquisition and interception. 6. The LES separated after fifteen seconds with the spacecraft now on a ballistic trajectory . 7. The spacecraft lost speed and reverted to the ballistic trajectory . 8. I was asking this question as I'm a total noob in the icbm ballistic trajectory . 9. It was a fin-stabilized field artillery rocket that followed a ballistic trajectory to ground targets. 10. The launch angle then changed and SUBROC flew to its destination following a predetermined ballistic trajectory .