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A dive computer is arguably the most important piece of gear in modern diving. Picture it as your digital buddy that helps keep you safe underwater. It tracks depth, time, and decompression status so that you know at any time when you have to go up and how safe you are in the water.

There are endless choices in the market. Here at Divers Supply, we carry the most trusted and reputable dive computer manufacturers, such as Cressi, Garmin, Mares, Oceanic, Shearwater, and ScubaPro.

With so many options available, you may feel overwhelmed by the choice and how to pick the right one for your diving. That’s why we’ve put together a guide that gives you the best dive computers for 2025 and explains how to choose the one that fits your diving style.

Essential Features of a Good Dive Computer

No dive computer is complete without the following essential features.

Algorithm Reliability

The decompression algorithm is the heart of any dive computer. It calculates nitrogen absorption and safe ascent

You can’t communicate with words underwater. When you want to ‘talk’ with your dive buddy, you need to use hand signals, a common language that you both understand.

These standardized gestures are the universal language of diving. They even let divers from different countries, backgrounds, and training organizations communicate clearly and effectively underwater.

So, let’s take a look at the diving hand signals every diver needs to know, from basic safety communications to specialized signals for marine life encounters and photography. These signals can make your scuba diving safer and more enjoyable.

Why Hand Signals Matter for Diving Safety

Underwater communication isn't just a convenience — it’s the best way to keep you safe when you dive. Effective communication between dive buddies is great for:

• Sharing important information about scuba equipment status
• Warning about potential hazards
• Coordinating movements and navigation
• Communicating physical or psychological concerns
• Sharing exciting

Scuba Tanks (Cylinders) Basics

What is a Dive Computer?

Choosing a Scuba BCD

Selecting your Buoyancy Control Device (BCD) or Buoyancy Compensator (BC) is a big decision on an important piece of equipment. It has quite a few jobs By using an inflatable air bladder and weight pockets, you can achieve positive bouyancy on the surface, negitive buoyancy to descend and neutral buoyancy once you achieve the depth you desire,

It attaches your scuba cylinder(s) to you and It allows the diver to carry or attach all of their accessories using built-in pockets, attachment points and D-Rings.