The cabin layout of the Ariel and Commander are qute different. The sink on the Ariel is almost directly over the low point of the bilge. In the Commander, the sink is located further forward. Most everyone locates their electric pumps at the lowest point in the bilge, regardless of the sink's location.

Standing water in the bilge has other than smelly consequences. As noted in the manual, this water can get into the hull laminate. Good idea to keep it dry down there.