Mares Nemo Wide Dive Computer Wrist Watch Manual: Setup and Use Guide

Updated November 2026

The mares nemo wide dive computer wrist watch manual is the reference you need before your first dive with this unit. This guide explains what the manual covers, how to work through its setup steps, and where new users tend to get stuck. You will finish with a clear plan for configuring the computer and reading it correctly underwater.

Where to Find the Mares Nemo Wide Manual

Mares packages a printed or digital manual with the Nemo Wide, and the same document is usually posted on the manufacturer’s website under its product support pages. Check that the model name on the manual matches your unit exactly, since Mares sells several Nemo variants with different features. If you bought the computer secondhand and no manual came with it, the manufacturer’s support team is the most reliable place to request a copy.

Shopping for one? See our guide: Suunto Zoop Novo Dive Computer Wrist Watch: 4 Best Picks Compared (2026).

Setting Up the Computer Before Your First Dive

Work through the setup at the surface, in a dry place, before you pack your gear. Changing settings on a wet unit is harder and makes errors more likely.

1. Set the date, time, and units (metric or imperial) first, so logs and dive times read correctly.
2. Enter your personal data as the manual describes, including any fields the unit uses for conservatism or altitude.
3. Confirm the gas mix setting if your model offers it, and leave it at air unless you are trained and equipped for nitrox.
4. Check the battery level and the alarm and display settings, then run any self-test the manual lists.
5. Write the settings down in your log so you can confirm them again before each trip.

Understanding Dive Modes and Displays

Most sections of the manual explain the display screens and how to switch between them. Spend time on the screens you will read most often: depth, dive time, no-decompression limit, ascent rate, and remaining tissue loading. Learn where the ascent and safety-stop prompts appear, because you may only have a few seconds to notice them at depth.

Know how the unit behaves in a surface interval. The manual describes how the computer tracks nitrogen between dives and when it returns to a clear state. Plan repetitive dives around these displayed values rather than around memory.

Reading the Manual for Safety Limits

Pay close attention to the warnings sections. Manuals typically specify maximum depths the unit supports, conditions that trigger alarms, and steps to take if the computer fails underwater. Note the manufacturer’s stated limits for depth, temperature, and battery replacement. A computer used outside its specified limits may give inaccurate readings. For any decision about decompression, altitude diving, or medical fitness to dive, consult a dive physician or a qualified instructor.

Checking Your Unit Before Each Trip

Run the same setup check each time you travel with the unit. Confirm battery condition, display clarity, and that the settings match your plan. Keep the manual in your dive bag so you can look up a symbol or alarm on the boat.

Common Mistakes

• Skipping the manual and learning the controls for the first time underwater.
• Leaving the computer set to a previous diver’s personal data or gas setting.
• Ignoring a low-battery warning until the unit is needed.
• Reading the surface interval display without checking the time remaining before the next dive.
• Confusing the Nemo Wide with a different Mares model and following the wrong instructions.

Recommended Gear

• A dive slate or waterproof logbook, because writing down settings and dive times helps you catch changes over time. View on Amazon
• A spare battery kept with your dive kit, since a dead computer mid-trip ends your ability to track dives. View on Amazon

FAQ

Where can I download the Mares Nemo Wide manual?

Mares posts manuals on its official product support pages. Match the model name on the document to your unit before relying on it.

Should I change the default settings before my first dive?

Yes, set the date, units, and personal data at the surface before the trip. Leave the gas setting on air unless you have nitrox training.

What should I do if the computer shows an unfamiliar alarm underwater?

Follow the manual’s alarm section and begin your ascent or safety stop as your training directs. Review the cause after the dive, and consult a qualified instructor if the alarm recurs.

Conclusion

Read the mares nemo wide dive computer wrist watch manual before your first dive, and set up the unit at the surface where you can check each step. Learn the display screens, the alarms, and the stated limits so you are not figuring them out at depth. For guidance on choosing and using a wrist dive computer more broadly, see Wrist Watch Dive Computer: How to Choose and Use One Safely (2026).

Related reading

• Watch Size Dive Computer (2026): Which Should You Choose?
• Smallest Dive Computer Watch: 4 Best Picks Compared for 2026
• Scubapro Dive Computer Watch: How to Choose and Use One (2026)

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