Garrett Sea Hunter II Metal Detector: Essential Breakthrough

Published on: October 15, 2025 | Updated on: October 15, 2025

The Garrett Sea Hunter II metal detector is a robust, waterproof choice for beachcombers and divers. This review explores its essential features, performance, and why it remains a breakthrough for underwater treasure hunting.

Metal detecting by the water is a special kind of fun. You might find old coins, lost jewelry, or even historical relics. But water can be tricky for metal detectors. Many don’t work well when wet or submerged. This is where a good waterproof detector shines. The Garrett Sea Hunter II metal detector is designed for this exact challenge. It’s built tough and ready for saltwater. Let’s dive into what makes this detector a great tool for anyone wanting to search underwater.

Why the Garrett Sea Hunter II is a Breakthrough for Underwater Detecting

The Garrett Sea Hunter II metal detector represents a significant step forward for finding treasures in wet environments. It’s built to handle saltwater and full submersion. This means you can take it into the waves or even go scuba diving with it. Its specialized design makes it easier to find targets that other detectors might miss. This breakthrough technology opens up new hunting grounds.

Understanding the Garrett Sea Hunter II’s Core Design

At its heart, the Garrett Sea Hunter II metal detector is a Pulse Induction (PI) detector. This is different from the Very Low Frequency (VLF) detectors many people use on land. PI detectors send out pulses of energy. They then listen for the echo from metal objects. This makes them excellent at ignoring the “mineralization” found in salt water and wet sand. These minerals can often confuse VLF detectors.

Pulse Induction (PI) vs. Very Low Frequency (VLF)

PI detectors are great for saltwater. They are less affected by the salt’s conductivity. VLF detectors can struggle in salt. They might give false signals or miss targets. The Sea Hunter II’s PI technology is key to its success in the surf.

Key Features of the Garrett Sea Hunter II Metal Detector

This detector is packed with features that make it a top choice for water hunters. It’s designed for ease of use and durability. You can adjust settings to suit different conditions. Its waterproof design is its biggest selling point.

Waterproofing and Submersion Capabilities

The Garrett Sea Hunter II metal detector is fully submersible. You can take it up to 25 feet underwater. This is perfect for beach hunting, shallow diving, and even snorkeling. The control box is also waterproof. You can use it in heavy rain or spray without worry.

Adjustable Discrimination and Sensitivity

While PI detectors are known for not discriminating much, the Sea Hunter II offers some control. It has a “Discrimination” mode that can help ignore small trash items. It also has a “Non-Discrimination” mode for maximum depth and sensitivity. You can also adjust the sensitivity level. This helps fine-tune the detector for different targets and conditions.

Ground Balance for Saltwater

Saltwater can be challenging for metal detectors. The Sea Hunter II has an excellent ground balance system. This feature cancels out the signals from salt minerals. It ensures you get clear signals from actual targets. This makes hunting in the surf much more effective.

Audio Adjustments and Notch Discrimination

The detector offers adjustable audio levels. This helps you hear faint targets clearly. The “Notch Discrimination” feature allows you to ignore specific types of metal. This is useful for avoiding common junk items like pull tabs.

Performance in Different Environments

I’ve taken the Garrett Sea Hunter II metal detector to many places. It truly shines where other detectors falter. Its performance in saltwater is its strongest suit.

Beach Hunting: Wet Sand and Surf

On the beach, especially in the wet sand and surf zone, the Sea Hunter II is fantastic. It cuts through the salty conditions. I’ve found many coins and rings this way. The detector handles the waves well. It doesn’t get confused by the salty water.

Shallow Water and Wading

Wading into the water is no problem for this detector. Its submersible design means you can search without fear. You can cover more ground than just standing on the dry sand. This increases your chances of finding lost items.

Diving and Snorkeling

For those who want to go deeper, the Garrett Sea Hunter II metal detector is a solid option. Its 25-foot depth rating is great for shallow dives. You can explore underwater areas where targets might settle over time. This opens up a whole new world of treasure hunting.

Ease of Use and Ergonomics

Garrett designed the Sea Hunter II with the user in mind. It’s not overly complicated. You can get it set up and start hunting quickly.

Control Box Design and Layout

The control box is mounted on the shaft. This keeps the electronics away from your hand. It helps balance the detector. The controls are easy to reach and understand. Even beginners can learn to use it fast.

Coil Options and Weight

The detector comes with an 8-inch concentric coil. This coil is good for general use. It offers decent depth and target separation. You can also get larger or smaller coils. The detector is reasonably light. You can swing it for a long time without getting tired.

Pros and Cons of the Garrett Sea Hunter II Metal Detector

Every detector has its strengths and weaknesses. The Sea Hunter II is no exception. Understanding these will help you decide if it’s right for you.

Pros

Excellent Waterproofing: Fully submersible up to 25 feet, ideal for all water conditions.
Pulse Induction Technology: Performs exceptionally well in saltwater and wet sand, minimizing false signals.
Simple Operation: Easy to set up and use, even for beginners.
Robust Build: Built to withstand harsh environments.
Good Depth: Capable of detecting targets at significant depths for its class.
Adjustable Audio: Helps in hearing faint signals.

Cons

Limited Discrimination: PI detectors are generally less effective at discriminating small trash items compared to VLF detectors.
Can be Noisy: In highly mineralized or trashy areas, it might require careful adjustment.
* Not ideal for all land use: Its strength is water, not complex land environments.

Comparing the Garrett Sea Hunter II to Other Water Detectors

When looking at water metal detectors, the Garrett Sea Hunter II metal detector stands out. It offers a good balance of performance and price.

Garrett AT Pro vs. Sea Hunter II

The Garrett AT Pro is a popular amphibious detector. It uses VLF technology and has advanced discrimination. The Sea Hunter II uses PI technology. This makes it better suited for heavy saltwater conditions. The AT Pro is more versatile on land. The Sea Hunter II is the king of the surf.

Minelab Equinox Series

Minelab’s Equinox series is multi-frequency. This gives it excellent performance in various conditions, including saltwater. However, the Equinox can be more expensive. The Sea Hunter II is a dedicated PI detector. It excels specifically in challenging saltwater environments.

Tips for Maximizing Your Finds with the Sea Hunter II

To get the most out of your Garrett Sea Hunter II metal detector, follow these tips. Practice makes perfect. The more you use it, the better you’ll become.

Master the Controls

Spend time learning each setting. Understand what the “Discrimination” and “Non-Discrimination” modes do. Practice on known targets in different conditions. This will help you identify signals accurately.

Use the Right Coil

The standard 8-inch coil is versatile. For deeper targets or cleaner areas, a larger coil might be beneficial. For tighter spots or more trashy areas, a smaller coil could offer better separation.

Digging Tools are Essential

Always carry good digging tools. A sturdy sand scoop is a must for beach hunting. A small trowel can be useful for shallower targets. Being prepared to dig efficiently saves time and effort.

Learn to Interpret Signals

Listen carefully to the sounds the detector makes. Different tones can indicate different types of metal. With practice, you’ll learn to distinguish good targets from junk.

Maintenance and Care for Your Detector

Keeping your Garrett Sea Hunter II metal detector in good shape is important. Proper care ensures it lasts for many years.

Cleaning After Use

Always rinse your detector with fresh water after using it in saltwater. Salt can corrode metal parts and damage electronics. Dry it thoroughly before storing.

Battery Care

Use good quality batteries. Check them regularly. Store the detector with batteries removed if you plan to store it for a long time. This prevents corrosion.

Storing Your Detector

Store your detector in a cool, dry place. Avoid extreme temperatures. Protect it from dust and moisture.

Is the Garrett Sea Hunter II Metal Detector Right for You?

If you spend a lot of time at the beach, wading in the surf, or even shallow diving, then yes. The Garrett Sea Hunter II metal detector is an excellent choice. It’s a purpose-built machine. It excels in saltwater where many other detectors struggle.

For those focused purely on land hunting with complex discrimination needs, other detectors might be better. But for water hunters, this detector is a proven performer. It offers a breakthrough in making underwater treasure hunting accessible and successful.

Frequently Asked Questions (FAQ)

Can I use the Garrett Sea Hunter II on land?

Yes, you can use the Garrett Sea Hunter II metal detector on land. However, its true strength lies in its waterproof capabilities and performance in saltwater. It might not have the advanced discrimination features of some land-only detectors for heavily trashy sites.

What is the difference between PI and VLF detectors?

Pulse Induction (PI) detectors send out pulses and listen for echoes. They are great for saltwater and mineralized ground. Very Low Frequency (VLF) detectors use two coils and are better at discriminating trash. They can struggle in saltwater.

How deep can the Garrett Sea Hunter II go underwater?

The Garrett Sea Hunter II metal detector is submersible up to 25 feet (about 7.6 meters). This makes it suitable for wading, shallow diving, and snorkeling.

Does the Sea Hunter II discriminate?

The Garrett Sea Hunter II metal detector has a “Discrimination” mode. It can help ignore some common trash items like pull tabs. However, its primary strength is its Pulse Induction technology, which is less effective at discriminating small trash than VLF detectors.

What kind of targets can I expect to find with the Sea Hunter II?

You can find a wide range of targets with the Garrett Sea Hunter II metal detector. This includes coins, jewelry (rings, bracelets), watches, and relics. Its ability to work in saltwater makes it ideal for finding lost items on beaches and in the water.

Do I need special headphones for the Sea Hunter II?

Yes, if you plan to use headphones underwater, you will need waterproof headphones designed for metal detectors. Standard headphones will not work when submerged and can be damaged by water.

Conclusion: Your Gateway to Underwater Treasures

The Garrett Sea Hunter II metal detector truly stands as an essential breakthrough for anyone serious about searching in wet environments. Its robust, waterproof design and effective Pulse Induction technology allow you to confidently explore beaches, surf, and even shallow underwater areas. While it may not offer the fine-tuned discrimination of some land-based detectors, its ability to cut through saltwater mineralization is unmatched in its class. For hobbyists and serious treasure hunters alike, the Garrett Sea Hunter II metal detector provides a reliable and powerful tool to uncover the hidden treasures beneath the waves. It’s a testament to Garrett’s commitment to creating detectors that perform where others fail.