While trying to find details on the proposed improved Space Shuttle heat shields, I stumbled across a fact I'd forgotten: the orbiters didn't have navigation lights (i.e. red left, green right, white astern or in another useful location for determining orientation).
This surprised me, because as someone who worked in the ISS rendezvous/proximity operations domain, I believe all the spacecraft that I ever had to think about, the ones being grappled at or docking to the US segment of station, had navigation lights (and I believe it was a requirement, which I might actually be able to find a public source for).
This got me wondering: is this anomalous to the ISS domain, maybe an artifact of the desire to see and monitor spacecraft as they approach? Did/do other crewed spacecraft / stations also use them? Or was Space Shuttle the anomaly in not having them?