Before revision: Rounding-up is a phenomenon that occurs in sailing when the helmsman or tiller-handler is no longer able to control the direction of the boat and it heads up (or "rounds up") into the wind, causing the boat to slow down or stall out.
After revision: ()Rounding-up is a phenomenon that occurs in sailing when the helmsman or tiller-handler is no longer able to control the direction of the boat and it heads up (or "rounds up") into the wind, causing the boat to slow down or stall out.