This is because the snorkel is believed to provide a duct of clean and cold air, compared to the hot and dirty air in the engine bay, where the intake usually finishes. As Safari Snorkels claims ...

There’s no place for snorkeling like Labadee! Read all about the Labadee Snorkel Safari excursion in Haiti. The first stop on our Royal Caribbean cruise was Labadee, Haiti. We decided that the ...