Sublight
Sublight, also called subwarp, space-normal speed, or sub-warp speed, was a term that referred to anything below , the speed of light, whose value is exactly 299,792,458 meters per second.

Sublight was usually used to describe non-warp speeds, typically when either an impulse drive or thrusters would be used as propulsion for a vessel.

Sublight speeds were measured in sublight factors. Alternatively, warp factors, expressed as lower fractional values, were used to measure sublight speeds. (, )

In 2018, scientific advancements in sublight propulsion made sleeper ships obsolete. ()

Captain James T. Kirk ordered the  to head for Makus III at sublight speed, fearing he might never see the  crew again. ()

Bajoran lightships traveled at sublight speeds. ()

fr:Subluminique
ja:亜光速
nl:Sublicht
Physics