While dive tables can work, dive computers are much safer and more accurate. They track your exact dive profile in real time and adjust no-decompression limits based on your depth, ascent rate, and previous dives - something tables can't do. Most divers today wouldn’t dive without one.

If you're just starting out, look for a simple, user-friendly model with clear screens and Air + Nitrox modes. Top-rated beginner options include the Mares Puck 4, Suunto Zoop Novo, and Shearwater Peregrine. They’re reliable, easy to grow with, and not overloaded with complex features.

That depends on your diving style. Key features include Nitrox support, wireless air integration, clear display, multiple dive modes (like freediving or tech), and good battery life. If you plan to travel, consider something compact and rechargeable.

A dive watch tracks time and sometimes depth. A dive computer calculates your no-decompression time, ascent rate, nitrogen loading, and more - it’s essentially your digital dive buddy, keeping you safe underwater.

For many divers, yes. Wireless air integration gives you real-time pressure readings from your tank and estimates how much air time you have left. It reduces the need for extra hoses and gauges and improves your awareness of air consumption.

Absolutely. Many dive computers are lightweight, wrist-mounted, and have rechargeable batteries - ideal for dive trips. Models like the Garmin Descent Mk3 and Suunto D5 are great travel companions that double as smartwatches or daily wear.

Only if it has a dedicated freedive mode, which offers faster sampling and accurate surface interval tracking. Many modern computers - like the Shearwater Teric or Suunto D5 - support both styles in one unit.

Algorithms like Bühlmann ZHL-16C or RGBM determine how conservatively your computer calculates your no-deco time. Some let you adjust this (e.g., more cautious settings for cold water or back-to-back dives). It's worth checking if you want more control over your dive profile.

Rechargeable models usually give you 20–40 hours per charge, while replaceable batteries can last up to a year. If you’re diving in remote areas, having a user-changeable battery can be a big plus.

Yes - most modern dive computers save your dive data automatically and can sync to your phone or laptop. Apps like Shearwater Cloud, Garmin Dive, or Suunto App let you review dive profiles, log notes, and even share dives with friends or instructors.

Some models are user-replaceable, while others require professional servicing to maintain waterproof seals. Always check your manual - or contact us if you're unsure.

Yes, we do.

We replace all dive computer batteries and all Suunto Dive Computer battery replacements take place onsite at our London Dive store. We have various levels of service ranging from same day battery change, express 1hr service or post in post back options. Usual turnaround is 7-10 days - simply choose whichever suits your needs.

Our London Dive Shop is one of the largest fully authorised Suunto Dive Computer battery change centers in the country. All Suunto Dive Computer battery changes are pressure tested in our very own pressure tester capable of 5ATM's of pressure, and all work is completed by a fully authorised and trained Suunto Technician. All of our dive computer battery changes are covered by a 3 month warranty and we only use authentic manufacturers service kits supplied from the relevant manufacturer.

We also cater for Mares, Oceanic and Scubapro Dive Computers along with most other major brands of dive computers.

Absolutely! We’re divers ourselves and factory-trained at Mike’s Dive Store, ready to help you find the perfect dive computer. Use our online chat, call or email us, or visit our London store in person.

For personalised advice, you can also book a free video consultation here:

Video Consultations at Mike’s Dive Store