Above and below the water, there are several devices I connect to add to my overall safety while diving.  Below the water, I carry a Rattler (or Shaker).  Whether I've spotted a seahorse or lost a weight pocket and need assistance, this little device is quick to get attention with very little effort.  Some like to bang their tank with their knife, but I find this to be muted and often not heard.  Noisemakers, like the Dive Alert Plus, are another great attention getter, with their quack-like buzz. 

 

Speaking of knives, you will always find mine firmly attached to my BCD.  Small and sleek, this little lifesaver is great for both cutting fishing line, as well as dicing my apple at lunch!

 

Above the water, you'll never see me leave the dock without my Dive Alert and Safety Sausage.  These two little devices have saved my bacon on three separate occasions.  The Dive Alert Plus offers both an above and below signaling option that is a great add-on to any set up.  

 

It's easy to overlook these basic safety devices while putting together your gear package, but they could be the one thing that keep you from floating afar from your group.  Just remember, it's Safety First!