Many people feel that summer water sports are dangerous. While accidents do occur, the vast majority are preventable. For example, boating is a relatively safe activity, provided that life vests are worn and a reasonable speed is maintained. When diving, it's important to know the area well and be certain that water is deep enough. Finally, alcohol should never be consumed while engaging in water sports or activities. Following these simple tips would prevent many accidents. The main idea expressed in the passage is