The seas and oceans cover approximately 70% of the Earth’s surface, forming its largest habitat. They also have a great impact on our lives in general. The oceans are not only a natural food source but also a source of fresh water, distilled through evaporation and precipitation. Among other interactions, they help regulate gases in the atmosphere and play an important part in climate control.
The areas that divers generally venture into are the shallower regions that are near land. The climate and geological conditions influence these areas the most. For example, rivers bring fresh water and pollution, coastlines change shape, weather impacts conditions, waves break, and water movement creates currents. As a diver, you are entering this environment and must learn not just how it will affect you but also how to conserve it. Educate yourself further about the environment, and be aware of the need to protect and conserve it.
The following are the unit objectives:
- Describe the effects the environment has on diving
- Outline the differences between saltwater and freshwater diving
- Describe passive and active interaction with marine life
- Describe what a coral reef is
- List some general types of marine life