For beginners, open-circuit diving is always recommended because of its simplicity. An open-circuit regulator is simple and easy to use. You don’t have to worry about components like the carbon dioxide scrubber or over-pressure valve failing, nor do you have to worry about maintaining or replacing those components. As a result, it’s a safer choice for beginners to the sport of diving.

Another benefit of open-circuit diving is its low cost of equipment. Open-circuit regulators are inexpensive, with some models costing just $200. In comparison, rebreathers are much more expensive. It’s not uncommon for rebreathers to cost over $5,000. This is because rebreathers contain more parts than regulators.