Differences between swimming in the ocean and swimming in a pool

 
pool
ocean
does what you hear and see there relax your mind
no
yes
have large areas of a certain depth suitable for a student of a particular height
no
yes
is easier to swim or relax in because of the boyancy
no
yes
people can slip and fall into it, often drowning
yes
rarely
there are waves that provide a variety of swimming experience
no
yes
is a crowded environment where people often touch each other
mostly
no
is the environment conducive for expanding one's consciousness
no
yes
require a high level of breath control and sophisticated breathing technique
no
yes
require mental control
no
yes
require a certain minimum fitness level
no
yes
simple swimming techniques and styles are sufficient
yes
no
may have dangerous waves or currents for an inexperienced swimmer
no
some places
water has a beneficial effect on the entire body
no
yes
the inhaled water irritates the nose and the throat, should not be swallowed
yes
no
the vapours can be inhaled safely
no
yes
can be used to play water games
rarely
yes
contain toxic chemicals that cause various diseases and health problems
yes
no
biological waste (urine, feces, dead bodies, saliva, mucus, etc.) is quickly diluted to negligible levels and consumed by microorganisms
no
yes
contain microorganisms that may cause slight and temporary negative reactions if the immune system is weak
no
yes
contain marine life (jelly fish, rays, etc.) that may injure the inexperienced and careless swimmer
no
yes
people can safely walk on the bottom at any depth
yes
no
are you required to follow strict rules (e.g. shower before entering water, wear caps, only synthetic swimsuits, no food on the deck, no fresh cuts, wounds or open sores etc.)
yes
no
can be used free of charge
no
yes
can be safely used at any time
yes
no
a swimmer who can swim in it well will have far greater chances of survival in boating or other accidents, floods, tsunami
somewhat
yes
easy to find a good swimming instructor
yes
no
the instructor or the lifeguard can observe a large group of learner swimmers
yes
no