To effectively use a full face snorkel mask underwater, descend vertically to allow the ball valve to properly seal the snorkel, preventing water entry. Once sealed, you can move freely in any direction.
Diving with a Full Face Snorkel Mask: A Step-by-Step Guide
Here's a more detailed breakdown of how to use a full-face snorkel mask underwater:
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Preparation: Before entering the water, ensure your mask fits snugly and comfortably. Adjust the straps for a secure seal around your face. Practice breathing normally through your nose and mouth while wearing the mask on land.
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Entering the Water: Slowly enter the water, keeping the mask above the surface until you're ready to submerge.
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Descending Vertically: The key to using a full-face snorkel mask underwater is to descend straight down. This vertical descent allows the ball valve (located in the snorkel tube) to rise and properly seal, preventing water from entering the mask.
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Maintaining the Seal: After the ball valve has sealed, you can then move in any direction. However, be mindful of your body position. Extreme angles might cause the valve to temporarily unseal.
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Equalizing Pressure: As you descend, equalize the pressure in your ears by performing the Valsalva maneuver (pinching your nose and gently blowing). You may need to equalize more frequently than with traditional scuba diving gear.
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Clearing the Mask: If any water does enter the mask, simply surface and allow it to drain, or exhale sharply into the mask to force the water out through the one-way purge valve located at the bottom of the mask.
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Addressing Air Pockets: Be aware that pockets of air can sometimes form inside the mask, potentially distorting your vision. Adjusting your head position can usually resolve this issue.
Potential Challenges and Considerations
- Limited Depth: Full-face snorkel masks are designed primarily for surface snorkeling. Submerging to significant depths is not recommended due to increasing pressure and the limitations of the mask's design.
- CO2 Buildup: Some cheaper full-face snorkel masks have been known to recirculate exhaled carbon dioxide (CO2). Always choose a reputable brand and model designed to minimize CO2 buildup.
- Ear Equalization: Equalizing ear pressure can be more difficult with a full-face mask compared to traditional masks since you are not able to pinch your nose inside of it.
- Panic: A full face mask can make it more difficult to remove quickly, making some people feel claustrophobic and panic. It is recommended to practice with it in a pool before going into the ocean.
Safety First
Always snorkel with a buddy and be aware of your surroundings. If you experience any discomfort or difficulty breathing, surface immediately. Full face snorkel masks offer a unique snorkeling experience but are not a substitute for proper scuba diving equipment and training.
