Sublight

Sublight or space-normal speed is a term that refers to anything below c, the speed of light, whose value is exactly 299,792,458 meters per second.

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

Bajoran lightships traveled at sublight speeds. 

Subluminique 亜光速 Sublicht