The Underwater World

If this is the first time you've used scuba to venture the underwater world, you're going to Immediately, you'll experience new sensations You venture into a realm where ever things looks sounds and feels a bit different. This is part of what makes diving so special at first you'll enjoy these sensation because they're new, but even after you've made hundreds of dives, you'll find them an important part of the diving experience.

The new sensations you have underwater result from physical differences that arise from being underwater. Becoming a diver depends on understanding how these principles affect you. In this section, you'll begin learning about these by looking at buoyancy and pressure. And, you'll be learning some extremely impressive words you can use to impress your Friends

Buoyancy

Have you ever wondered why a large steel ocean liner floats, but a small steel nail sinks? The answer is surprisingly simple The ship's steel hull forms a shape that displaces - pushes aside - much water.

The same amount of steel reshaped into a giant nail would sink, of course, like the regular sized nail. This demonstrates that whether an object floats depends on both its weight and how much water it displaces- its volume.

You can state the principle of buoyancy this way An object placed in tuater is buoyed up by a force equal to the weight of the quantity of water it displaces.

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Dive Equipment Equipment Identification Fins Give Preview Introduction Padi Open Water Pressure and Your Body Regulators Scuba Systems

Scuba Tanks SnorkelsSubmersible Pressure Succed Course The Effects of Increased Air Density The Effects Pressure The Underwater World The Buddy System Valve Types