Spearfishing is one of the world’s oldest recorded ways of underwater hunting and fishing. From prehistoric cave paintings to spearguns today, hand weapon capture and underwater fishing have traveled a long way in advancement. In all this, at the core of underwater fishing lies the speargun, an instrument of simplicity, intelligence, and raw underwater power.

But how do spearguns actually work? What are the qualities that make them accurate, safe, and efficient? In this guide, we'll break down the mechanism and design of the speargun—piece by piece—and show you how they work and how to choose and use one. You'll find out about different propulsion systems, how the shooting line works, and how to stay safe and responsible in the water at all times. So, whether you’re a beginner spearfisher or fine-tuning your arsenal, this article will guide you on how to properly comprehend the mechanics and application of a speargun.

A Brief History of Spearfishing: From Ancient Ritual to Modern Sport

The underwater world is mysterious, quiet, and beautiful, with colorful marine life. If you are ready to discover what lies beneath the sea, you want to scuba dive or snorkel. Which one is better, though? Ultimately, the answer depends on what matches your expectations and how you want to explore the underwater world. Both activities focus on sea exploration but aim for different interests and have distinct equipment requirements. 

The underwater world is mysterious, quiet, and beautiful, with colorful marine life. If you are ready to discover what lies beneath the sea, you want to scuba dive or snorkel. Which one is better, though? Ultimately, the answer depends on what matches your expectations and how you want to explore the underwater world. Both activities focus on sea exploration but aim for different interests and have distinct equipment requirements.

So, let's take a peek at everything you need to know about snorkeling vs scuba diving!

What Is Snorkeling?

Snorkeling is a surface

Whether you're diving a shallow reef or filming a shipwreck at 100 feet, the right underwater camera can turn an enjoyable dive into an unforgettable one. As a dive instructor and an underwater photography specialist with over 50 years of experience, I've tested just about every kind of camera setup available—from rugged phone housings to dedicated 4K camera rigs, all with varying results.

In this guide, I’ll walk you through the top five performing underwater cameras across key categories, including budget friendly cameras that are beginner ready and action focused for the best videos and still images. These aren’t just basic spec sheet picks they’re tools I’ve seen perform in real dive conditions, with real divers giving great results time and time again.

SeaLife SportDiver Ultra Housing

Best Budget Underwater Camera

Why We Love It

It’s one of the most accessible ways to start underwater digital photography, especially if you already own a high end smartphone. With depth protection

If you have been scuba diving, you have probably squeezed into a wetsuit, and you know what it feels like. Maybe it felt like an endurance sport just to be put on, or perhaps you experienced that uncomfortable flushing sensation when cold water rushes into a suit that's too loose.

We've all been there. Getting the correct wetsuit sizes is about comfort, safety, and performance. A well-fitted wetsuit is considered one of the most important accessories for enjoying surfing or underwater adventures, so you don’t feel cold and miserable.

Proper wetsuit sizing is necessary, no matter how experienced you are. Whether preparing for your first dive or shopping for a different water activity, you want to buy the right wetsuit that fits like a glove. You need to pay close attention to a size guide to understand how wetsuits should fit on you and what sizes best match your body and needs. Let’s look at how to buy the right wetsuit for your body and enjoy plenty of underwater explorations.

Have you ever felt the shock of cold water take your breath away? Have you had to cut a great session short because your fingers went numb? That's where the wetsuit vs. drysuit decision becomes important.

The right open-water swimming suit keeps you warm and comfortable, making for an enjoyable underwater experience. It's the difference between an epic day on the water and a miserable (or potentially dangerous) experience. Think of it as the main gear decision you'll be making for cold-water temperatures.

Wetsuits and drysuits, with their thick layers underneath, solve the same problem: keeping you functioning in cold water environments. However, they each tackle this challenge through completely different approaches. One lets water in (counterintuitively), while the other blocks water from entering the body.

What is the difference between wetsuits and drysuits? Which system works better? 

Wearing a drysuit or a wetsuit depends entirely on your needs. Water temperature, activity

Scuba diving depth limits vary based on certification level, experience, and equipment. You need to know your limits to plan your dive safely and enjoy it fully.

As a general rule, pressure increases dramatically and compresses your body and equipment. Time at depth becomes precious and limited. And yet, with these challenges come rewards: pristine ecosystems untouched by casual visitors, marine life rarely seen in shallower waters, and the profound silence and serenity that can only be found in the ocean's depths.

Talking about scuba dive depths means discussing several factors, such as certification restrictions, physical limitations, equipment requirements, and safety protocols. Each of these elements determines how deep you can—and should—dive.

Diving depth isn't just about pushing limits. It is about matching your skills, equipment, and dive plan to your objectives while maintaining a substantial safety margin. As you get more experienced, you can push further deep into the ocean.

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