10 Best Scuba Diving Computers 2025 in the United States

The Garmin Descent Mk3i is a premium scuba diving computer designed like a smartwatch, featuring a bright 1.4-inch AMOLED display that’s easy to read even underwater. It has a robust 200-meter dive rating and a durable titanium case with scratch-resistant sapphire glass, making it tough enough for serious divers. One standout feature is its advanced air integration system, which uses SubWave sonar technology to monitor tank pressure and share messages with up to eight divers nearby—ideal for group dives and enhancing safety. The dive computer supports multiple dive modes, from recreational to technical and freediving, giving flexibility for various diving styles.

It also includes a built-in LED flashlight with adjustable brightness and color modes, which is very useful in low-visibility conditions underwater. The Garmin Descent Mk3i offers dive planning support by tracking lifestyle factors like sleep and stress to help you decide if your body is ready for diving, although this is an estimate rather than a medical assessment. GPS and ABC (altimeter, barometer, compass) sensors assist with navigating above water and around dive sites, though GPS doesn’t work underwater.

With Bluetooth and USB connectivity, the watch syncs dive logs and data with Garmin's Dive app, making it easy to review your dives and share information. It also functions as a multisport smartwatch with health monitoring features such as heart rate and sleep tracking. The battery is rechargeable lithium polymer, and the watch weighs about 166 grams, which is relatively lightweight for its size and features. The advanced air integration system requires a separate transceiver device, adding to the cost. The GPS is not usable underwater, but that's standard for dive computers. The watch is relatively large at 51 mm, which might feel bulky on smaller wrists. While it has many features, beginners might find the interface complex initially. For serious recreational or technical divers wanting a robust, feature-rich dive computer with smartwatch benefits, the Garmin Descent Mk3i is a strong choice.

The Garmin Descent™ Mk3i is a high-end scuba diving computer with a host of advanced features. Its standout feature is the bright 1.4” AMOLED display, which is both visually impressive and functional. The device is durable with a 51 mm titanium bezel and a scratch-resistant sapphire lens, making it suitable for tough underwater environments. The dive-first design ensures it is waterproof up to 200 meters, and it includes metal leakproof inductive buttons for reliable underwater operation. The multiple dive modes cater to both recreational and technical diving, including freediving, enhancing its versatility.

Air integration is a key feature here, allowing monitoring of tank pressures and depth for up to eight divers when paired with the Descent T2 transceiver (sold separately), making it great for group dives. However, the additional cost for the transceiver might be a drawback for some users. The built-in LED flashlight with variable intensities is a handy feature for low-light conditions. The device also boasts dive readiness tools and DiveView maps, aiding in planning and navigation. Its multi-band GPS and ABC sensors provide accurate positioning and navigation, though GPS tracking is not functional underwater. The ability to store and review data from up to 200 dives directly on the wrist and through the Garmin Dive app is convenient for logging and analyzing dives.

Additionally, the watch includes various sports apps and health monitoring features, making it a versatile smartwatch for everyday use as well. It connects via Bluetooth and USB, compatible with both Android and iOS. The 105.6-gram weight and round shape are ergonomic, but users seeking lighter devices might find it a bit heavy. With a considerable memory storage of 32 GB, it's well-equipped for storing dive data and apps. The battery life and capacity (150 mAh) are adequate for extended use, but users should note that heavy GPS and sensor usage might drain the battery faster. The Garmin Descent™ Mk3i is an excellent choice for serious divers who need a reliable and feature-packed dive computer that doubles as a robust multisport smartwatch.

The Garmin Descent Mk2i/Descent T1 Bundle is a feature-rich, watch-style dive computer designed for scuba diving enthusiasts. Its 1.4-inch color sunlight-readable display is larger than previous models, enhancing visibility underwater. The device is elegantly designed yet rugged, suitable for various environments. Battery life is impressive, offering up to 32 hours in dive mode with the T1 transmitter enabled, and up to 16 days in smartwatch mode, which is convenient for extended use without frequent charging.

The air integration feature, which pairs with the Descent T1 transmitter, allows monitoring up to 5 tanks and provides critical data like remaining air time and air consumption rate, beneficial for both solo and group diving adventures within a range of 10 meters. The dive computer also includes an advanced wrist-based heart rate sensor and Pulse Ox for blood oxygen monitoring, useful for sleep monitoring and altitude acclimation, though not intended for medical diagnoses. Versatility is a strong point, as the device supports multiple sports apps, training features, contactless payments, music storage, and streaming service support, making it suitable for multisport training.

Connectivity options include Bluetooth Smart, ANT+, Wi-Fi, and SubWave, enhancing data sharing and device synchronization. The user interface is designed to be intuitive, allowing easy access to dive logs and modes, with a capacity to store and review data from up to 200 dives. The product is compact and lightweight, weighing 1.4 pounds and measuring 2.05 x 2.05 x 0.7 inches. However, GPS tracking does not work underwater, which might limit some navigational features during dives. This dive computer is best suited for avid divers seeking comprehensive data and multifunctionality in a stylish, durable package.