They can be found all over the universe and are separated by less than a day's travel at sub-light speeds.
This, unfortunately, required them to travel to a destination at sub-light speeds, at first, to set up a gate.
Our transport shudders with the transition from hyper-L to sub-light speeds.
Mr. Chekov, plot a course, at sub-light speed, to the scene of the attack.
I take it that the Enterprise is also traveling at sub-light speed?
The herald always arrived ahead of the Terror, traveling through normal space at sub-light speed.
The first actual Space Monster was discovered in the process of researching sub-light speed.
The vessels can only gradually accelerate, and then merely to sub-light speeds, so the voyages will last many years.
The most common role of sleeper ships in fiction is for interstellar travel, usually at sub-light speed.
So objects can be moving at sub-light speed yet appear to be moving apart faster than light.