Scuba divers who use the conventional scuba systems must be very careful to monitor the depth and time while they stay underwater. They have to endure a series of lengthy decompression steps during resurfacing. But the thing is, the oxygen tank that scuba divers take with them under water is filled with limited oxygen. Before the oxygen finishes, the divers have to come up. Therefore, recycling air devices have been made at different times in order to stay more longer with shorter decompression on ascent under water. Let's have a look into the recycling air scuba system.