Diving is a fun and popular sport. However, there are some steps every diver should follow to ensure he has a safe dive.
Scuba Diving Safety Rules:
Get proper training
Being comfortable underwater will go a long way towards having a safe dive. Proper training is one key to being comfortable underwater. The beginning of proper training is to get your open water certification. If you go diving in caves, caverns, wrecks, etc., you should also have the proper training for this type of dive. Don't dive beyond your ability.
Never dive alone
Always dive with a buddy no matter where you are. This is key. When you do dive with a buddy, keep an eye on him/her to make sure everything is OK (and hopefully they are doing the same). If something happens, that buddy can be the difference between life and death. Never violate this rule. Also do a pre-dive equipment check with your buddy.
Be in good physical shape
You don't have to be a triathlete but you should be able to swim and take the stress of diving. A physical exam is a good idea before diving.
Don't hold your breath
Remember to always breathe slowly and in a relaxed manner and to exhale fully. Don't take short, shallow breathes and never hold your breath. Holding your breath underwater can lead to lung injuries and worse, in the extreme case.
Ascend slowly and with control
As you ascend you are ridding your body of nitrogen in your tissues and bloodstream. If you ascend too quickly, you risk decompression sickness. Always do a safety stop at 15 feet for at least 3 minutes after deeper dives. After your safety stop, do not propel yourself to the surface either. Ascend that last 15 feet very slowly also.
Check your equipment
Checking equipment is especially important if you are renting. If you own your regulator and haven't dove in a while, it should also be serviced to make sure it is working properly. Do a check of the regulator hoses also.
Being relaxed and comfortable underwater is key to a successful dive. If something happens, stop, breathe, think and act. Do not panic and rush to the surface. But observing this safety rule could be key to a safe dive.
Plan your dive and dive your plan
You will hear this in your training (or you should) and you should follow this advice. Prior to going under, you and your buddy should know the max depth you will go, the amount of bottom time you'll have and how much air you will start to ascend with. Check your air supplyoften. You should also agree on the hand signals you will use to communicate underwater.
This is just the beginning of scuba diving safety rules. However, if you follow the above list you increase your chances of a safe dive.