2024 Suunto D6i NOVO and Zulu – 5 Dive Modes including Freediving

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Last Updated: January 11, 2024

Suunto's D6i NOVO and D6i Zulu - 5 Dive Modes including Free Diving

In this review, we explore in more details the features of the Suunto D6i Novo that advanced recreational, technical and professional divers are looking for.

Suunto discontinued the D6i in January 2017. This left the D6i Novo as their leading watch sized dive computer. Not long before discontinuing the D6i, Suunto released the D6i Novo Zulu.

This has become a very popular choice for free divers and spear fishers.

Suunto D6i Novo Zulu Collection

If you already know the Suunto D6I Zulu is for you, click the button below to see the latest pricing and any savings that may apply at Scuba.com.

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Click on the item below to find the answer to your most pressing question or keep scrolling to read the entire review.

Suunto D6i Novo and D6i Novo Zulu at a Glance

  • Integrated tilt-compensated 3D Compass
  • 5 Dive Modes - Air, Nitrox, Gauge, Free and Off
  • Gas Switching - up to 3 gases
  • Option for wireless Air Integration
  • Steel Casing and Sapphire Crystal Display

The Specifications

All Suunto D6i Novo dive watches feature a tough steel case and scratch-resistant sapphire crystal glass, with a protective coating that shields against dirt and grease. It also has an anti-reflective coating.

Scuba Deals

The D6i Novo is water resistant to 492 feet (150 meters), although it’s maximum operating depth is 393 feet (120 meters).

The USB cable is included. This allows you to update the firmware each time Suunto release an update, and to download your dive logs onto either a PC or Mac.

The Suunto D6i Novo measures 1.91 inches (48.5 mm) across the face and is just over half an inch thick (.63 inches / 15.9 mm). It weighs just under 3.98 oz (113 grams).

The D6i Novo dive computers are easy to sync with Suunto DM5 software and Suunto Movescount so you can share your dive logs, images, and videos.

D6i Novo & Novo Zulu Range and Prices

Suunto D6i Novo White

The Suunto D6i Novo is available in Steel, Black, White, Stone and Stealth. These are currently retailing between $1000 to $1200.

The transmitter retails for around $450. When shopping around for packages, make sure the 'package' is a real deal, otherwise buy these items separately.

The Zulu strap transforms the D6i Novo into a great looking watch sized dive computer. These military style straps are extremely durable and come in black, stealth (brown) and blue. These are priced slightly above the standard D6i Novo, but you'll be able to buy the D6i Novo Zulu online for under $1300.

Personalize the Functions and Settings - Make it your own!

There are plenty of settings that can be adjusted to your preference.

The Calendar Clock displays the date, day of the week, hours, minutes and seconds. There is 1 daily alarm clock. This can be set as a one off, or set to activate once on weekdays, or once per day. The time format can be switched to show as either 12-hour or 24 hour.

It's easy to set the units to be shown in either metric or imperial units. This will be either meters and Celsius, or feet and Fahrenheit. You can't mix the two. For example, you can't have it display in meters and Fahrenheit.

The Suunto D6i Novo includes a Stopwatch, and has a Dual Time function. This helps you keep track of the time in a second time zone.

The brightness of the display can be adjusted to your own personal preference, and also to suit different diving conditions. 

What's the expected Battery Life and Replacement?

The battery on the Suunto D6i is not user replaceable. This needs to be done by an authorized service agent. This avoids possible leakage of water into the battery compartment or the computer. The warranty becomes void if this is not done by an authorized agent.

All history and logbook data, altitude, personal and alarm settings will remain in the memory after the battery replacement, but other settings will revert to factory defaults.

Professional Divers Love the Dive Modes and Gas Switching

The Suunto D6i Novo has 5 dive modes: Air, Nitrox, Gauge, Free and Off. It has the capacity to switch between up to three gases during a dive. Decompression calculations are based on the gas that's been tagged as your Primary gas.

When using the dive computer in Gauge Mode, it won't calculate your dive profile. This is a depth gauge and bottom timer only. After using it in Gauge mode, you will be locked out of DIVE mode until the No Fly time is over. The No Fly time after diving in Gauge mode is 48 hours.

Suunto D6i Novo - Free Diving and Spear Fishing

Spearfishing with Suunto D6i Novo Black Stealth Zulu

This watch sized dive computer is very popular with free divers and spear fishermen. It can be used for free diving with its FREE mode.

The Dive time is shown in the center of the display in minutes and seconds. It starts at 4 feet (1.2 meters) and finishes when your depth is less than 3 feet (0.9 meters). The maximum operating depth is 393 feet (120 meters).

Up to 5 depth notifications can be set for free diving. Each notification can be turned off and has a defined depth. The low priority audible alarm sounds, and the backlight blinks when the notification depth is reached.

Surface Countdown Timer

Suunto D6i Novo Zulu Black

The surface countdown timer is there to help to prepare you for your next dive. The countdown activates automatically at 4 feet (1.2 meters).

Apnea Timer

The apnea timer can be used for interval training when free diving. 

Ventilation time, the Increment time (the time added to the ventilation time for each interval) are adjustable settings, along with number of interval repeats. Depending on the ventilation times and increment times, the apnea timer supports up to 20 intervals.

Digital Compass and Compass Calibration

The Suunto D6i Novo has an integrated digital compass with a tilt-tolerance of up to 45⁰ to help with navigating underwater. This will give accurate readings even when the compass isn't fully horizontal. The compass is activated from either the TIME or DIVE mode and displays your current bearing and depth.

The Compass Timeout setting lets you adjust the length of time the compass shows for after being activated.

There’s a Bearing Lock setting to help you keep you headed towards your intended direction. If your bearing starts to shift outside of your intended direction, left or right arrows are displayed that will direct you back to the correct bearing.

You need to calibrate the compass the first time you use it. This is done by slowly rotating the dive computer in your hand using large figure-8 movements. The compass adjusts itself to the surrounding magnetic field and will need to be re-calibrated when traveling overseas.

Below is a video showing how easy it is to calibrate the compass and set your bearing on Suunto's D6i.

Click to play

Planning to dive at different Altitudes?

The Suunto D6i has an Altitude setting for diving at different altitudes. The dive computer can be manually adjusted to up to 9800 feet (3000 meters).

Suunto D6i Novo Zulu - Black

Travelling to different altitudes can temporarily cause changes to the equilibrium of your body. The pressure in the atmosphere is different at higher and lower altitudes. It doesn't matter if you're travelling higher or lower - if you're switching your altitude by 1000 feet (300 meters) or more, you'll need to give your body time to adjust.

It's generally recommended you wait at least 3 hours when travelling to a different altitude before diving.

It's critical that Altitude settings are adjusted whenever you dive at altitudes greater than 1000 feet (300 meters). This needs to be included in dive planning calculations. No-decompression limits are considerably reduced due to the altitude.

What about the wireless Air Transmitter (AI)?

Air Integration (AI) technology has become more reliable in recent years. Especially when compared to the early days of wireless air transmitters.

Can you dive without it? Yes. Will it make your dives easier, more accurate, safer, and more enjoyable? Yes. When you're penetrating a long and narrow passage in a wreck, you'll appreciate that your computer has AI. With the flick of the wrist, you'll see all the vital info you need with minimal movement.

The Suunto D6i Novo has the option for adding a wireless Air Transmitter. The AI transmitter attaches to the first stage of your regulator. Suunto strongly recommends that this is done by a technician as it needs to undergo a pressure test after being installed.

Suunto Wireless Air Transmitter
  • how to pair

  • display info

  • warnings

Pairing with the Air Transmitter

The Suunto D6i Novo and the transmitter need to be paired before they can start talking to each other.

The transmitter activates when the tank pressure is more than 15 bar (300 psi). When the D6i is placed within 1 foot (0.3 meters) of the transmitter, it receives the tank pressure data along with it's pairing code. This is a unique code to help prevent data mix-up from other divers also using a Suunto wireless AI transmitter.

Pairing generally only needs to be done the one time. On the odd chance that a diver in your group is using the same code, another code needs to be assigned and the units re-paired.

How to avoid Decompression Stops

The Suunto D6i Novo makes it very easy to plan for dives with no decompression stops. If you want to dive without deco stops, use the PLAN NoDeco function. After entering the dive depth of the dive, the D6i makes the calculations needed to avoid the extra stop.

All your dive history from the previous 4 days and calculated residual nitrogen, are taken into account.

Safety Stops, Depth Alarms and other Features

A critical part of most diving plans is the Safety Stops. These are widely considered good diving practice. 

The Suunto D6i has all recommended and mandatory safety stops.

Whenever you dive below 30 feet (10 meters), a 3 minute countdown for the recommended safety stop is shown. This stop is taken in the 10 ft to 20 ft (3 to 6 meter) range.

Deep Stop is set to On by default.

As long as it's not turned off, this alarm will automatically activate when diving deeper than 65.6 feet (20 meters).

If the Dive timer is displayed on the dive computer when Deep Stop is activated, the timer is replaced with Deep Stop. Once the Deep Stop is over, you're able to change between Deep Stop and the Timer.

Note though, if the back light function has been switched off, it won't illuminate when an alarm sounds.

Logbook and Dive History Capacity

Log Book Capacity

In MEMORY mode, you’ll find a detailed logbook and dive history. The logbook records the dive profile for each dive. The frequency of data saved in the log is based on the sample rate selected.

When the battery is replaced according to the instructions (by an authorized dealer), the contents of the memory will not be lost.

The capacity of the logbook depends on the dive sample rate.

Without wireless AI transmitter data and at the default sample rate of 20 seconds, the capacity is approximately 140 hours. The capacity reduces to 35 hours with the air transmitter data.

Once the memory is full, the oldest dives are deleted as new dives are added.

Log Book Menu Pages


Main Page

The Main page shows the date and start time of the dive, the type of dive, the maximum depth, the total dive time (in minutes), and the gas percentages of the first used gas mix.


Surface Time & Warnings

This page shows the average depth, maximum depth, consumed pressure (if enabled), warnings, OLF% (if applicable), and surface time after the previous dive.


Dive Profile Graph

The Dive Profile Graph page shows the water temperature, the depth / time profile of the dive, and the tank pressure (if enabled).

Dive Profile

Dive History

The dive profile displays the point-by-point dive information such as compass heading, decompression information, ceiling and ascent time, and depth.

Pressing the Select button at any time during a dive will add a Bookmark to the dive log. These are viewed in the logbook when scrolling the dive profile. Present depth, water temperature, time, tank pressure (if available), and heading (if the compass is enabled) will be recorded. 

The D6i has separate areas for Scuba History and Free Diving History.

Scuba History records the Maximum Depth, the dive hours, and the total number of dives. A maximum of 999 dives and 999 diving hours is recorded in Scuba History. After this time, the counters reset to zero.

Free dive history records the total number of dives, the deepest and longest dives of all free dives, and the cumulative dive time in hours and minutes. A maximum number of 999 dives and 99.59 diving hours are recorded. The counters reset to zero after this.

Should you buy a D6i Novo Zulu, or retrofit other D6i Novo models?

Suunto D6i Novo Zulu - Stealth

The popular Zulu strap is NATO compliant. Zulu straps were originally designed for military use and built to last in tough conditions. The addition of a Zulu band makes this comfortable and stylish for every day use.

Zulu bands are a favorite of divers all over the world due to the double-sling closing system. It has adapters and thick, rounded stainless steel rings, to easily adjust it when wearing over a wetsuit. This ensures it stays on your wrist even if something unexpected happens during a dive.

What about Suunto's Manufacturers Warranty?

Dive computers are designed to withstand the rigors of diving, but need to be treated with the proper care as any other precision instrument. It should go without saying, but don't go out of your way to knock it or drop it. Protect it from extreme heat and chemicals.

The Suunto D6i Novo comes with a 2 year manufacturers warranty.

A 1-year warranty applies to accessories such as the wireless sensors and transmitter, cables, and straps.

The warranty doesn't cover the normal wear and tear including scratches, or exposure to chemicals such as sunscreens and mosquito repellents. Full warranty information can be found on Suunto's website.

D5 Diving Computer

How to care for your Suunto wrist diving computer

After each dive in salt water, rinse the wrist computer in fresh water with a mild soap. Clean the housing with a soft cloth or chamois.

The water contact sensors and depth sensors are located on the side of the computer. These can be cleaned using fresh water and a soft brush or soft toothbrush.

If you detect any moisture inside the case or battery compartment, take it to an Suunto authorized service agent for checking.

The Verdict

This is classic Suunto design, functionality and reliability all in a compact, great looking package. The D6i Novo dive computer is very robust watch sized dive computer, and looks great for everyday use.

Suunto D6i Novo Zulu Collection

The Suunto D6i Novo is a compact, well equipped watch-sized dive computer. This makes many Best Dive Computer lists.

With its ability to switch between up to 3 gases, integrated 3D compass and optional wireless air transmitter, the Suunto D6i is for serious recreational, technical and professional divers. The FREE dive mode makes it a great choice for competitive free divers.

This dive computer comes with the USB cable.

Unless you buy the package, the wireless air transmitter is not included in the price. This is around $450 and can always be added on later. Look for bundle deals that include transmitter that will save you money.

Click the button below to see the current price and any discounts available for the Suunto D6i Novo and D6i Novo Zulu at Scuba.com (Leisure Pro). 

3.6/5 - (35 votes)

About the Author

Sharon McKenzie

Sharon McKenzie is an Advanced Certified Scuba Diver who loves to explore the ocean depths. She is an advocate for marine and eco conservation, promoting sustainable products. In her free time, Sharon also enjoys paddleboarding and snorkeling. She has two upcoming diving expeditions to Bali and the Great Barrier Reef, which are destinations she has always wanted to explore.

Author Web Link

Sharon McKenzie - Stand Up Paddle Boarding, Snorkeling

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  • Maybe I missed it in the article, but is this dive computer compatible with mobile devices? And if so does it work with Android?

    • Hi David, yes it is. Start by installing the free download of Suunto DM5. This lets you transfer dive logs from the dive computer and upload dive plans. Once the dive data is on your PC or Mac, you can go to http://www.movescount.com and share everything with your friends, or access online from anywhere. The Movescount App works for both an Android or iPhone and can be downloaded through Google Play or the Apple App Store. I hope this helps.

  • Thanks for the detailed review. What exactly is the Deepstop function? Does it give you adequate decompression stop information once you go into decompression mode? Or does it lock you out? How conservative is this computer compared to its competitors?

    • Hi Quinn, Great questions! The Suunto D6i will display an error message if you miss a decompression stop. If this happens, you need to descend back to below the ceiling level and continue with the planned deco stop. This is a safety feature in order to reduce your risk of DCI. If you fail to descend within 3 minutes, then you will be locked you out of decompression information for 48 hours. The Suunto RGBM model is considered conservative by some. The level of conservatism can be adjusted to suit your personal preference. Just as an aside, Oceanic was considered to have a less conservative RGBM model than Suunto, but they’re now introducing a dual algorithm model into their dive computers that are bringing them closer to the Suunto in conservatism.

  • It’s amazing that something so small can have all these capabilities … technology is amazing! When you do change the battery, is it expensive due to the waterproofing? Or is it the regular cost? They look quite sophisticated too! Thank you!

  • This is a great review. I appreciate the extra detail. I’m moving to tech diving but prefer a watch-size DC. I like Suunto’s and the D6i is good. I’ve been renting these and I like them, so I’ll be buying one so I can personalize it to suit me.

  • This watch is simply amazing with all of the things it can do. One of the best features, IMO, is that the memory is not lost when you change the battery. Real nice!

  • What a good looking dive watch – I like the steel with stainless steel band – I think it’s a great option for your dive watch! Great review! thanks!

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