If you are not physically fit for
snorkeling then you may experience a cramp in your calf muscles. You
can treat that by stretching or trying to relax your leg muscles. You
should wear a life jacket at all times while you are in water. You
should also wear a wetsuit in cold water to keep your body heat in.
EAR stands for expired air resuscitation. That is a technique all
divers should know how to do. It is when you breathe air into their
lungs to keep them breathing. You can even do this while towing them
into the side of the pool.