10 Best Dive Computers 2025 in the United States

The Garmin Descent Mk3i is a premium dive computer designed like a smartwatch, featuring a sharp 1.4-inch AMOLED display protected by a scratch-resistant sapphire lens. Its titanium case is durable and rated for dives up to 200 meters, making it suitable for both recreational and technical diving as well as freediving. One standout feature is its advanced air integration, which allows monitoring of tank pressures for up to eight divers when paired with Garmin's Descent T2 transceiver, helping divers keep track of their air supply easily. Communication between divers using SubWave sonar technology is also a useful addition, offering preset messages underwater.

The watch has a sturdy build with metal leakproof buttons and offers several dive modes. Size-wise, it’s fairly compact and lightweight (just under 6 ounces), so it’s comfortable to wear both in and out of the water. Connectivity options include Bluetooth and USB, allowing easy syncing with Garmin's Dive app to review and share dive logs for up to 200 dives. Multi-band GPS provides accurate positioning on the surface, and the built-in ABC sensors (altimeter, barometer, compass) assist in navigation, although GPS doesn’t work underwater.

Additional features like a built-in flashlight with variable brightness, dive readiness insights based on your health data, and health monitoring (heart rate, sleep, respiration, Pulse Ox) make this device versatile for everyday use beyond diving. Pulse Ox functionality isn’t available everywhere, and the dive readiness metrics are close estimates rather than medical-grade data. This dive computer is well-suited for serious divers who want a robust, feature-rich device that doubles as a multisport smartwatch, though it might be less ideal for those seeking a simpler or more budget-friendly option.

The Garmin Descent Mk3 is a sleek, watch-style dive computer designed especially for smaller wrists, featuring a bright 1.2-inch AMOLED display protected by a scratch-resistant sapphire lens. It’s built tough with a 43mm stainless steel case, and rated for dives up to 200 meters, making it suitable for both recreational and technical scuba diving as well as freediving. The dive modes cover a wide range of needs, and the device includes metal leakproof buttons for reliable underwater use. While it doesn't have traditional air integration displayed explicitly, its advanced dive algorithm and built-in sensors, including an underwater compass and ABC (altitude, barometer, compass) features, help divers navigate effectively.

The battery life supports up to 30 hours in dive mode, which is ample for most diving sessions, plus up to 10 days in smartwatch mode for everyday use. It also offers strong connectivity options like Bluetooth and USB, syncing dive logs to the Garmin Dive app for easy review and sharing. Additional features include multi-band GPS for accurate surface positioning, health monitoring tools like heart rate and sleep tracking, and smart functions such as music storage and contactless payments, enhancing its use beyond diving.

GPS doesn’t work underwater, which is typical but worth noting if you expect underwater positioning. Also, the dive readiness tool offers estimations that should not replace professional advice. Weighing just 2.56 ounces, it is comfortable to wear all day. This dive computer suits divers seeking a versatile, high-quality device that combines serious dive functionality with everyday smartwatch features.

The Garmin Descent Mk3i is a high-end, versatile dive computer that doubles as a multisport GPS smartwatch. Its standout feature is a vibrant 1.4-inch AMOLED display, ensuring readability even in challenging underwater conditions. The device also boasts a robust build with a scratch-resistant sapphire lens and a titanium bezel, which adds to its durability and aesthetic appeal. With its comprehensive dive modes and 200-meter water resistance, it is suitable for both recreational and technical divers, including freedivers.

The air integration capability, when paired with the Descent T2 transceiver (sold separately), allows for monitoring tank pressures and exchanging messages between divers, enhancing safety and communication underwater. The built-in LED flashlight with variable intensities is particularly useful in low-light environments, providing both red and white light options. Additionally, the dive readiness tool is a thoughtful feature, offering insights into how lifestyle factors may impact diving performance. The inclusion of DiveView maps and multi-band GPS technology further enriches the diving experience by offering detailed dive site maps and precise navigation.

For fitness enthusiasts, the device supports various sports apps and provides extensive health monitoring, including heart rate and sleep tracking. On the downside, the device is relatively heavy at 105.6 grams, which might be noticeable on the wrist during extended use. Furthermore, certain advanced features require additional purchases, such as the Descent T2 transceiver for full air integration functionality. Connectivity options include Bluetooth and USB, ensuring compatibility with both Android and iOS devices. The battery life is powered by a lithium polymer battery, though the 150mAh capacity may require frequent charging, especially with intensive use. Despite these minor drawbacks, the Garmin Descent Mk3i offers a comprehensive package for divers seeking a reliable and feature-rich dive computer that also supports an active lifestyle.