The ship then shot out of orbit at nearly full impulse.

Please set course 187 mark 9 and proceed at full impulse.

"We are at full impulse and unable to escape its pull."

We'll have to go at full impulse just to make it out of here in time.

At full impulse, he was gradually pulling away from them.

"Take us to a safe distance, best speed at impulse."

"While we're stuck at impulse, we aren't going to get there in time to do us any good."

And even at full impulse, that's going to take some time.

Physically, even at high nuclear impulse, they were well more than a year away.

And the field was expanding too fast for them to escape at impulse.