Walking inside a space ship while it is moving at high speeds

Yeah, there’s probably no way around faking it.
But let’s say there are two space ships controlled by players. They are both going in opposite directions at max speed. Even if I fake it with all kinds of effects it would still have to be pretty fast movement in order to look plausible.
I noticed that even very low movement can already cause the player to glitch (I’m talking about speeds like 20 mph).

Is there a better way (better for physics) to move the ship than using AddActorLocalOffset?