Watch

A unit of time equivalent to two hours. Each day had six watches, (beginning from sunrise) and each night as well (beginning from sundown).
 
Common to all cultures and races, though originally instituted by the Zmee, or so it is said.
 
The Zmee generally measure Watches with a water clock — a tube with a float that slowly fills with water and raises the float. A good water clock will have 6 tubes that successively fill-up in series over the course of a Zmee 6-day week.
 
The Akadians use candle-burn to measure Night Watches and both Akadians and Elim generally use various kind of sundial shadows to measure a Day Watch.