![Pilot Cork of Savehaven Marine, Ireland](https://3vcc27.n3cdn1.secureserver.net/wp-content/uploads/2012/11/PilotCork-01-750x380-470x260.jpg)
How does it work?
Air-Only ventilator, which is a core device for all models, let air in and keep water out via the use of spherical floats.
Operating principle: soft PVC balls float within the vent as soon as there is water on deck, along vertical guides, and form a watertight seal. As soon as the water subsides, the balls descend, letting air in again. Illustrated on pictures below.
![ds_cut_water](http://farm8.staticflickr.com/7136/7583445234_0621fb1147_m.jpg)
Operating principle: soft PVC balls float within the vent as soon as there is water on deck, along vertical guides, and form a watertight seal. As soon as the water subsides, the balls descend, letting air in again. Illustrated on pictures below.
![aov principle 250x143](http://farm9.staticflickr.com/8069/8205898459_9d480c3b64.jpg)
![ds_cut_air](http://farm9.staticflickr.com/8283/7583447582_8354c4da96_m.jpg)
![ds_cut_water](http://farm8.staticflickr.com/7136/7583445234_0621fb1147_m.jpg)
Air-Only deck ventilators have been awarded the Special Mention DAME 2003 in the category of Deck equipment, sails and rigging.
![DAME 2003 logo](http://farm9.staticflickr.com/8350/8206776218_593436bc7b_m.jpg)
![DAME 2003 logo](http://farm9.staticflickr.com/8350/8206776218_593436bc7b_m.jpg)