Obviously, the first difference that comes to mind when comparing scuba diving and freediving, is the gear. The word SCUBA comes from the acronym of the words Self-Contained Underwater Breathing Apparatus, which refers to our scuba system – the regulator, BCD and air tank. These 3 items, combined together, give us the ability to breathe comfortably and quite safely under the water. The tank holds the air we breathe, the regulator brings the air to our mouth in a pressure suitable for breathing, and the BCD helps us not to struggle with buoyancy and keeps us safe. With this system, we can stay and experience the aquatic world for very long periods of time, and safely spend many minutes (or even hours) enjoying the underwater environment. But, it also means, we need to have that gear, carry it around with us and it might make it hard/uncomfortable (sometimes) to be on the surface. Which is, of course, worth it if you get to see a massive school of jacks, for example.