SCUBA = Self Contained Underwater Breathing Apparatus SCUBA: Test Your Snorkel Savvy How and when to use the tube.
By Jon Hardy How to Care for Your Tube You have to admit, sometimes there's nothing like gliding along free
of bulky scuba equipment, just you and the trusty tube. Although the primitive snorkel of old is all grown up (see "Snorkel Review"
<http://www.scubadiving.com/gear/snorkels>), there's still a lot to learn about when and how to incorporate this sometimes problematic piece of gear
into your overall scuba rig. Should I use it at all? There are times when the snorkel may be useless, in the way or when it may actually increase the risk of diving.
This is especially true when diving in caves and caverns, inside wrecks, beneath the ice, with a DPV, in strong currents, on some drift dives and sometimes on deep dives controlled by a descent and ascent line. Where should it be attached? To reduce drag and keep the snorkel out of your face, it is common in many dive areas not to wear a snorkel on your mask, but to put it in a pocket or holster made for that
purpose, slip it behind the straps holding the knife to the leg. Attach it by a clip to your BC or place it behind the straps or belt on the front of the BC. Should I avoid having to use the snorkel?
Yes. Scuba divers are less efficient swimming on the surface than at depth and should learn to use natural and compass navigation under water to avoid long surface swims. When waiting on the surface in rough conditions,
you can also use your regulator. Surface swims can also be made on your back, which allows more efficient use of scuba fins and does not require a snorkel. Should I use a snorkel during water entry?
Definitely not. Regardless of water conditions, you will not have to clear the regulator upon entry, but you will probably have to clear a snorkel. A giant stride entry could push water through the bottom purge valve, resulting in a mouthful of
water. What's
the best way to clear a snorkel? There are three basic methods:
- The blast or popping method--a forceful blow to expel water--is used on the surface.
- The expansion or displacement method--a slight exhale to push the water clear as you ascend from a free dive--is used as you near the surface.
- The drain or tinkle method--dumping water by removing the snorkel from your mouth--is used on the surface with snorkels that are especially hard to clear and by children.
What's the best way to breathe when using a snorkel?
Snorkel breathing is a specific adaptation, just as breathing efficiently from a regulator is. Both are best done in a slow, deep and relaxed manner with emphasis on the exhale.
Why must I attach the snorkel to the left side of my mask?
Even though most snorkels can be attached to the right or left side, it is still best to put it on the left for two reasons: some snorkels are designed to work best on the left, and there will be less confusion with your primary regulator hose.
What if water remains in the snorkel after I clear?
If the snorkel has a purge valve, pause before clearing to allow time for the water to drain down to the waterline; then it will be easier to clear. When clearing by the blast method, use a quick, forceful exhalation. After clearing any snorkel, take your next breath cautiously and gently, using your tongue as a splash guard, in case water remains. If you continue to have difficulty, try turning your head so the snorkel is parallel to the water's surface and give a quick, forceful blow.
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