Sometimes while scuba diving, water finds its way into your mask. If your mask fills with water, you can't see a thing. Not only that, it is a required skill for certification.
Here's How:
Completeley submerse yourself in the water.
Pull your wask away from your face.
Allow the water to flood your mask.
Don't panic.
Continue breathing through your snorkel or regulator.
Gently tilt your head backwards.
Press the top of the mask against your forhead with one hand.
Take a deep breath through the snorkel or regulator.
Gently exhale the air through your nose. (The air will force the water out).
When the mask is completely clear of water, replace your mask so that it has a snug fit.
Continue to breath normally through your snorkel or regulator.
Tips:
If you fail to be successful the first time, try it again.
If you continue to have trouble clearing your mask, check for intereferences (twisted straps, hair, or a cracked seal).
Perfect your skills in a swimming pool first.
