Decompression sickness is not 100% preventable. However, by following the recommended preventative measures, you can minimize your risk.

Chapter 6 will teach you how to use dive tables and computers to determine the maximum dive time for your planned depth. You should use these tools prior to every dive.

Many DCS cases are the result of a rapid ascent to the surface. To reduce the risk, ascend at a rate no faster than 30 feet per minute.

Before surfacing, stop at 15 feet for 3 to 5 minutes. This allows additional time for your body to offgas nitrogen before surfacing.

You should wait at least 12 hours, and preferably 24, before flying or driving to high altitudes. Atmospheric pressure continues to decrease as you ascend in the atmosphere, so high altitude can cause decompression sickness if your body hasn't had time to sufficiently offgas excess nitrogen.

Statistics show that in 80% of DCS cases, the victim is dehydrated. You can reduce this risk by drinking plenty of water and avoiding alcohol and caffeine before and after diving.