Halfway between the Cook Islands and Tonga, we spent a whole day preparing or 30-foot ketch for a gale that had been forecast for the region. We did everything we’d learned to do, but rarely had the chance to truly test—we double checked our pumps, stripped the decks of any loose items, hanked on the […]
As ventilation experts explore ways to make indoor spaces safer during the COVID-19 pandemic, we became curious about ventilation in our boats. As it turns out, where we install our exhaust or intake vents (portlight, hatch, or cowl) is just as important as what type of vent we use. Just as we can use the suction on the leeward side of a sail to pull the boat forward, we can use pressure differentials in the air surrounding the cabin to maximize the ventilation. Understanding the pressure differentials created by the flow of air over our boat’s deck is vital to the success of any passive ventilation scheme.