I don’t think so, no.
We know in the modern day, Warp Travel for the Imperium depends upon the Astronmicon Beacon. That allows for long range navigation, and so much longer journies.
Prior to that, the Votann perform the same function, albeit individually not as bright. Given the Votann are STC Databases, we can extrapolate that whatever came before The Great Crusade, mankind had a network too.
Which raises the question of how one might navigate The Warp outside of our galaxy. And a bigger question to which there is currently no answer would be “is the Warp as much of a mess far, far away from sentient beings”. Because a stormy sea doesn’t make for a stormy ocean.
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