Snorkels are to skin diving as the scuba is to scuba
diving. To be able to swim with fins for long distances, while keeping the
head looking down, and not having to turn and breathe makes all the difference
in the world.
However, snorkels in scuba diving are becoming less popular.
Even though most certifying agencies still require the use of the snorkel,
the fact of the matter is they are rarely needed, cumbersome, and annoying.
The main purpose for using a snorkel during a scuba dive, as is stated in
the textbooks, is to allow the diver to swim on the surface for long distances
without the need for trying to breathe by lifting the head out of the water.
Get over on your back, enjoy the swim, and talk to your buddy while you are
Some of the things to look for when purchasing a snorkel
Make sure the bore of the snorkel is the right size. If the thumb fits snugly
in the top of the snorkel it is correct. A snorkel bore that is too small
will not allow enough air to flow through and will make breathing hard. One
that is too large will make it difficult to expel the water after surfacing.
Some snorkels have a flexible section near the mouthpiece. The section is
corrugated so if it is bent it will not close. The reason for the flex is
to allow the snorkel to hang straight when not in use. In that way it does
not interfere with the scuba regulator. Be sure the interior of the corrugated
section is smooth. The corrigations should not continue on the inside because
water will trickle down the grooves and into the diver's mouth.
The snorkel may have a purge valve. This is usually a one-way flap at the
bottom. Its purpose is to let the water fall through this valve when the
diver surfaces. The water in the snorkel will fall to the level of the ocean's
surface. The remainder of the water should be blown out by the diver forcefully
exhaling. Some will go out the top and some will go out the purge valve.
Unfortunately, purge valves will leak if they get the slightest sand under
them. If a leak occurs the diver has to bend the purge valve flap back and
rinse all the sand from the area. Purge valves add to the price of the snorkel.
Check to see how the snorkel is removed from the mask. Some snorkel keepers
are in the shape of a figure eight. Sliding them up and down a dry snorkel
is difficult. When using that type of keeper most divers simply leave the
snorkel attached to the mask. However, if you have purchased a mask box to
store the mask in, it will be impossible to close it with a snorkel attached.
If that be the case purchase a snorkel with an easy mechanism for removing
and replacing it on the strap of the mask.
The mouthpiece should be comfortable in the mouth. After all, you may be
biting on this for several hours at a time. As gross as it may seem, stick
the thing in your mouth prior to the purchase. The dive shop should have
an antiseptic spray, or at least a sink with soap and water to avoid germs.
Silicone is the way to go. Forget the black rubber varieties. They rot from
oil and the sun. They do not show contamination. See the comments below about
the minor problems with silicone.
You do not need any device to keep the water from entering the snorkel when
going under water. Learn to blow the water from the snorkel as experienced
divers do. It will save you money and increase your air flow!
Snorkels are traditionally worn on the left side of the
diver's mask. That is because the scuba regulator comes over the right shoulder
and both would conflict with each other.
The snorkel should be attached to the outside of the
mask strap rather than putting it under it. Masks may leak if the snorkel
is between the strap and the head, and if a keeper is not use the snorkel
may be lost without warning. Also, it may become uncomfortable after a period
of time to have it pressed against the head.
Proper breathing is important for pleasurable skin diving.
The breathing should be longer and deeper (not faster) than usual. It is
important to blow as much air out of the lungs as is comfortable. Short breaths
would simply fill the snorkel with waste air that would be inhaled over and
over again. A real shallow breath would not bring in any fresh air and the
diver would suffer from oxygen starvation. Long, slow breaths are the key
to enjoyable skin dives. The exhale should be fast followed by a deep inhale.
Then hold your breath for a short time. Your expanded lungs will help to
Lastly, there are two methods of getting water out of
a non-purge valve snorkel. One is to surface and blow as hard as possible
through the mouth. This burst of air should eliminate most, if not all, the
water from the snorkel. Be careful on the inhalation. Start slowly just in
case there is still a little water remaining. If so, there will be a sprinkling
of water drops into the mouth. A quick inhale could cause coughing. If water
remains in the snorkel, breathe in slowly until the lungs have sufficient
air to blow out hard again. The second method of clearing has to be done
in water where the diver can rise to the surface in a vertical position.
On the way up, the head is tilted back so the diver is looking directly at
the surface. As the surface is neared, air is gently blown into the snorkel
continuously. As soon as the surface is reached, the head is brought to the
position where the diver is looking toward the bottom. The snorkel should
be completely empty! The effort is so slight compared to the forceful exhalation
technique, skin diving can be done for hours without chest discomfort!