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Space is far from an empty vacuum. Its a vacuum, just not an empty one. Every second theres background radiation, specks of dust that put bullets to shame hitting your ship with varying gusto. Sudden bursts of radiation or solar storms can push you off course at the very least or turn your ship into popcorn at worst whereas debris can make you look like swiss cheese. Knowing where storms or clouds of speeding rocks are passing through can give you enough time to sail over/under certain death.
 
Right now there exists a registry of known asteroids and a constant watch on the sun. We have a good idea where plasma arcs are headed a few days in advance but its not precise. We know where some really big asteroids will be on a given date but were limited by the power of dedicated telescopes and Its really hard to find something when you have no idea where to look.
 
A network of Sun orbiting satellites dedicated to tracking objects could provide a system-wide weather report that reliably predicts real time hazard zones, giving navigators the means to protect their ships from harm. With out faster than light communication a live feed would be impractical, each satellites lag would be minutes apart. Each satellite would need to broadcast on a frequency that could be picked up on all receivers which would set priority on signal strength. The data would be logged into an algorithm which fit weaker strength signals into previous sequential settings based on self reported locations and time dilation. With the combined readings, the navigation equipment would display previous behavior of all identified objects and predict most likely future movements.
 
TLDR? Space Weather Tivo