In 1928, Rod Stephens of Sparkman and Stephens fame, developed the concept of the dorade box that was appropriately named after his famous sailing yacht named Dorade. Mariner's has carried on the tradition of building dorades for pleasure yachts.

In the animated drawing, you can visually see how both air and bluewater enters the Cowl Vent. The air passes down through the Dorade, over the baffle and into the cabin space below. The bluewater is trapped behind the baffle and drains through the weep holes.