Answer:
You row in one while you float.
You could do this to a motion, see it on a watch, or place this in a race.
Very helpful if you intend to go gently down a river.
What is red, bloody and smells like an orange?
What freezes after it is heated up?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.