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Equalise Pressure in the Snorkel Mask

Credit: Jeremy Leach
article: How to Dive Down Safely While Snorkelling 		Other images from this article
Diving Down While Snorkelling Gives a Better View Get a Closer Look at Fish and Coral Equalise Ear Pressure to Prevent Pain Pinch the Nose and Blow Out Gently Equalise Pressure in the Snorkel Mask
Equalise Pressure in the Snorkel Mask, Jeremy Leach