Thrust Jump is a gameplay mechanic in Call of Duty: Black Ops III. It allows the player to boost themselves into the air for a short period of time. Unlike the Boost Jump from Advanced Warfare, the thrust jump is slower, and won't get the player as high.
To activate, the player must double jump and hold down the jump button to activate the thrust. The thrust will only remain active as long as the button is pressed or until the meter runs out. Thrusting continuously will allow the player to reach greater heights, while thrusting in small increments allows them to stay in the air longer.