In Caliban's War, there's a scene where Bobbie is jogging on a ship during her trip to Earth.
She gave her wristwatch a quick glance. Two hours. At her current leisurely pace, that meant twelve miles. Push for twenty?
Her use of imperial units stuck out to me. Have there been other uses of Imperial units in the series? I haven't noticed any but, as an American, they wouldn't necessarily register as odd to me since I use them every day. I could easily miss a reference to them.