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What is the relationship between buoyancy and diving?
For an object placed in water, the buoyancy it receives is equal to the weight of the water it displaces. If the weight of water in the water is greater than the weight of the object itself, the object will float on the surface of the water. We call it positive buoyancy. On the contrary, it sinks and is called negative buoyancy. If the weight of water discharged by the object is equal to the weight of the object itself, the object will be suspended in water to achieve neutral buoyancy.
When diving, it is important to learn how to control the size of the buoyancy on the surface and the bottom of the water. For example, when resting on the water surface, positive buoyancy can save physical strength, while on the bottom of the water, most of the time it needs to maintain neutral buoyancy to enable you to easily and freely swim in the water, maintain good visibility, and avoid fragile water and you. Creatures are harmed.
Divers can adjust the buoyancy by means of weights, buoyancy adjustments (BC) and the depth of breathing.