|
Modern snorkels have a sump in the mouthpiece to allow a small volume of water to remain in the snorkel without being inhaled when the diver breathes. Some have a one-way output valve in the sump, which automatically drains the sump as it fills with water. Many snorkels now come with Splash guards to help keep waves from entering the tube. Newer DRY snorkels have float-operated valves attached to the surface end of the tube to keep water out when the snorkeler submerges.
|