A deck vent that allows air to flow below decks without taking water with it. The ventilator cowl is mounted on a box screwed to the deck with its pipe extending into about half the box's depth. The top of the downtake spout is fitted more or less level with, and close to, the bottom end of the cowl piping, and extends through the deck into the vessel's accommodation. Any spray that enters the box through the cowl runs into the scuppers from holes in the bottom of the box, while the dry air flows through the downtake spout. It first appeared in 1933 on the ocean-racing yawl Dorade, and was invented by Roderick Stephens, Jr., the younger brother of Olin Stephens, Dorade's designer.
Subjects: Maritime History.