Silent Storm - Spartan Speed

His HUD showed the distance to the target as thirteen hundred meters, so he estimated they were still about thirty seconds from the base of the avalanche run-out, and probably three or four times that from the prowler itself. The fog had risen back above his head, and he couldn’t see how far away the alien ship was—but he doubted it would take the Covenant vessel more than a minute to reach the crash site.

- Halo: Silent Storm, Chapter 13