Most probably you’ve seen those divers with two tanks and guessed they must be technical divers. Sidemount can be recreational and technical. It came from cave diving and covers many recreational diving needs now. It solves air consumption and buoyancy difficulties, giving safety during deep and drift dives. And it gives you a chance to grow and explore something new as a diver.
Not sure about it yet? Try it out and have your own opinion about this equipment.
To try it out you have to be certified as an Open Water.