Even at impulse speed, a starship could cover a lot of distance in five minutes.

At impulse speed, they'll be in deep space for months.

However, in less than an hour he was forced to slow the starship to impulse speed.

At impulse speed, it wasnt all that difficult, of course.

What they could not do was maneuver well at impulse speeds.

The surge to impulse speed wasn't bad, especially for an old ship like this one.

Under normal circumstances that trip would take minutes for the Enterprise at full impulse speed.

Inside the solar system they'll have to drop to impulse speed.

In the short run, it might not hurt them, since the battle was currently being fought at impulse speeds.

Certainly, the storm had managed to keep pace with them at impulse speed.