In light of recent events, I feel like its important to highlight safety in freediving…No piece of equipment can ‘keep you safe’ or even comprehensive training like that provided by Evolve FreeDiving , PFI or Freediving Instructors (which I HIGHLY recommend!) guarantees that you won’t make a dumb decision. However, combining these tools will definitely help you manage the inherent risks of the sport and hopefully help you enjoy it for a lifetime! I believe that a good freedive computer is essential to safe diving. Not only does it give you a depth gauge, but most importantly, it helps you manage your surface intervals and dive profiles to slow you down and make sure you are getting proper recovery cycles. As a bonus, it also logs all your dives so you can review them after the day and get a better understanding of your diving skills. I have been diving with the Suunto D4 for the past 3 years and other than the inconvenience and expense of having to send it to Finland for battery changes, it has proven itself in all conditions and never had a malfunction. I can’t recommend it highly enough.