We've already got some impulse power and at least a little bit of helm control.

"Most are going to do little better than half impulse power."

At least you have impulse power and a few weapons.

"We have full impulse power now," Data said from his forward position.

"Can it still be done if impulse power is left active?"

It would take them years to get anywhere under impulse power.

"How long before we get impulse power back on line?"

It was taking far too long to get impulse power going.

"At full impulse power, it will take just under two hours."

It could take hours to cover that distance under impulse power.