Dive Computer

G one are the old days when you had to do dive table calculations before scuba diving, as now you have wearable computers that do them for you. Thus, you get to enjoy the wonders of the ocean without having to think about anything else as the dive computer calculates nitrogen levels for you, making the whole experience safer, more simplistic, and a lot more fun.

Top 5 Dive Computers Compared

	1. Shearwater Research Teric	2. Scubapro Z1	3. Suunto Zoop Novo	4. Oceanic Geo 2.0	5. Mares Puck Pro
	Best Model	Best with Navigation	Best for Freediving	Editor’s Choice	Best for the Money
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General Info
Manufacturer	Shearwater	Scubapro	Suunto	Oceanic	Mares
Dimensions	2.17″ x 2.17″ x 0.71″	N/A	2.6″ x 2.6″ x 1.03″	N/A	2.87″ x 2.4″ x 0.79″
Bezel Material	316 Stainless Steel	316L Stainless Steel	Composite	N/A	N/A
Case Material	Composite	Composite	Composite	N/A	Composite
Glass Material	Sapphire Crystal	N/A	Acrylic	N/A	Mineral
Type	Wrist	Wrist	Wrist	Wrist	Wrist
Technical Specifications
Performance Details
Algorithm	Decompression	Bauhlmann	Continuous Decompression	Dual	RBGM
Depth Rating	200m	100m	80m	100m	150m
Operating Modes	5	3	5	4	3
Metric and Imperial Units
Fresh/Seawater Settings
Data Transfer	Bluetooth	Bluetooth	USB Cable	USB	USB Cable
Log Book Memory	500 Hours	30 Dives	~ 140 Hr	24 Dives/99 Free Dives	~ 36 Hr
Diving Functions
Altitude Adjustment			0 – 300m, 300 – 1500m, 1500 – 3000m	916-4200m	Up to 3700m
Dive Time	0 – 999 Min	0 – 999 Min	0 – 999 Min	N/A	0 – 999 Min
Ascent Time Indicator			0 – 199 Min
Battery
Type	Rechargeable Lithium-Ion	Solar Powered	CR 2450	CR 2430	CR 2450
Life when Diving	N/A	N/A	1.5 Years	1.5 Years	300 – 500 Dives
User Replaceable	Factory Replaceable
Features
Dive Planner
Backlight
Audible Alarm			1 Daily Alarm
Stopwatch Timer
Low Battery Indicator
Temperature Display
Clock Display				N/A
Safety Stop
Deep Stop
Warranty&Support
Product Warranty	2 Years	1 Year	2 Years	2 Years	2 Years
User Manual
Customer Support

1. Shearwater Research Teric

The Bluetooth smart technology used by this model grants you the possibility to download and view dive logs quickly over the device of your choice, whether it is your tablet, smartphone, or PC. The Shearwater Research Teric redefines versatility in use, providing you with multiple operational modes to pick between – OC recreational, OC technical, CC/BO, freediving, and gauge.

It features haptic and audible alarms for depth and time that you can configure as you see fit and even disable if that is what you prefer. As it uses air integration, it can connect with up to 2 transmitters so that it keeps tabs on 2 tank pressures simultaneously. Since the bezel and buttons are made with 316 stainless steel and the window is made with sapphire crystal, you can rest assured knowing that rough handling doesn’t even scratch it.

It features a 1.39” display with vivid colors and a neat black background to ensure clear visuals. It works up to 660 feet underwater, notably more than most of its competitors, so the high asking price should not come as a surprise. It allows you to customize the watch face so that it can be wearable even in your day-to-day life, not only when you dive. Moreover, there are 15 color options to pick between when it comes to the display style so that you match your style.

It features the stopwatch function that will inevitably come in handy during your underwater adventures. It uses a rechargeable lithium-ion battery to run, which in dive mode provides over 30 hours or runtime, while in watch mode lasts for over 50 hours of runtime. Furthermore, the dive log can record up to 500 hours of material.

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2. Scubapro Z1

We start off with the obvious, more precisely the impeccable aesthetics. It features a polyacrylate case and 316L stainless steel bezel, so durability is a given even if you accidentally knock it during your underwater trips, all despite its lightweight design. Probably one of its best traits is that it is solar powered, so the battery charges by simple exposure to sunlight or even to fluorescent light. Moreover, it features a power-saving function so that it consumes as little power as possible to maximize dive time between charges.

It operates at a maximum depth of 328 feet or 100 meters. The Buhlmann algorithm it uses offers it Nitrox capability from 21% to 100% for up to 4 Nitrox mixes, and it provides 3 dive modes to pick between.

Its digital compass helps make navigation easy, and it features full time-keeping functions, including a stopwatch. It sends off alarms both of a visual and auditive nature that you set in order to be alerted whenever your dive status is off-course in any manner, enhancing safety underwater.

It can configure pressure reduction according to the current atmospheric pressure. In its logbook, it can store up to 30 sessions and it even allows you to check the dive history to analyze data. Furthermore, it uses Bluetooth 4.0, so you can connect it to your smartphone and download your dives there for more convenient viewing.

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3. Suunto Zoop Novo

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Considering the features it provides and its ease of use, it is safe to say that the Zoop Novo delivers the best price to quality ratio at the moment. Regardless if you explore new territories or dive in a spot that you are already familiar with, it provides you with key data that make the session a lot safer. It even helps with freediving as it features an integrated apnea timer, which makes it perfect for recreational divers.

Design

The case and bezel are made with composite material to ensure durability, while the glass is made with acrylic. The strap is made with elastomer to fit your hand comfortably. As it is designed to resist water damage when submerged 80 meters, you can go really deep and still rely on it. It weighs only 4.23 ounces, which means that you will barely feel you have it on your wrist. Furthermore, it measures only 2.6 inches by 2.6 inches by 1.03 inches, so it won’t look too big for your hand.

Functions

There are 5 modes that you can select between with it – air, nitrox, free, gauge, and off. When set in the air mode, it shows how deep you go and how long you can stay at that specific depth, focusing on recreational dives. When set in the nitrox mode, it automatically adjusts your decompression algorithm and sounds off an alarm when you go too deep.

In the free mode, it records dive times and maximum depths without penalizing you for ascending times, which makes it ideal for snorkeling. In the gauge mode, it acts as a simple depth gauge, without taking into consideration decompression info. Lastly, the off mode deactivates its automatic activation when it gets wet.

Mention-Worthy Features and Specs

• Battery level is shown on the screen so that you are alerted of its status and not let the device run out of power when you are in the middle of a diving session.
• It is able to hold up to 140 hours of diving data so that you may keep better track of your sessions.
• Utilizes a continuous decompression algorithm that ensures safer ascents during your sessions.

Warranty

As well designed as it may be, there is always something that could go wrong with the Novo. In the off-chance that this does happen and you need a part to be replaced as it has malfunctioned, or it performs bad to begin with due to a manufacturing mistake, you can have it fixed or replaced free of charge during the first 2 years since the moment of purchase.

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4. Oceanic Geo 2.0

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Not the most advantageous purchase financially speaking but one worth every cent as it does compare to the best products in its niche, the Geo 2.0 features an intuitive user interface that makes it a wise choice for anyone new to this tech who wants to enjoy longer, qualitative diving session and make sure safety is guaranteed each and every time. To keep you aware of as many stats as possible, it displays the time, date, and temperature at all times.

User acknowledgment is something the device focuses on, the audible alarms it sends off letting you know when you are reaching dangerous depths. There are 4 operating modes it puts at your disposal to provide you with a complete experience, more precisely the classic Watch mode, the Gauge mode, the Free Dive mode, and the Norm mode.

It is operational to a depth of 330 feet or 100 meters, and it allows you to adjust altitude from 30001’ to 14000’ as well. The convenient single-button access to “Last Dive” shows you the important stats of your last session. The screen is even backlit to make it easy for you to check the parameters it displays in low light conditions. Best of all, it retains calculations indefinitely even after you change batteries, so your precious diving history is always kept with it.

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5. Mares Puck Pro

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Despite the fact that there are numerous notable features which accompany this product and make it perfect for use by entry-level divers, it actually comes at a more than reasonable price. Thus, it is not a significant investment, and one that you will surely not regret making as after your first diving session with it on your wrist you will fall in love with it.

The personal profiles it features allow you to adjust the algorithm however you want, thus enabling you to make it more conservative and enhance diving safety by doing so. Capable of storing numerous information, you will be able to go back and review info about previous diving sessions at any point.

It boasts a single-button navigation that takes all the hassle out of using it, and the strong backlight it features can be set to last from 1 to 10 seconds in order to preserve battery while still making it easy for you to see the displayed data when there are low lighting conditions. Another notable highlight is the fact that it can handle oxygen mixtures from 21 to 99 percent when set on the Nitrox diving mode.

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6. Aqua Lung i300

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In terms of pricing, the i300 is one of the more affordable products, which is a major upside. it puts a total of 4 operating modes at your disposal to select between depending on your needs – Air, Gauge, Nitrox, and Free Dive.

It is one of the more convenient to use devices as it features backlighting which makes it possible to read data off of it even in low light conditions. Furthermore, it saves data, settings, and calculations between battery changes so that you won’t lose anything of importance.

It boasts a reliable ruggedness which makes it one of the more durable devices. One of its more interesting features is the water-activated “On” switch that makes your life a whole lot easier, ensuring you it will turn on when you start descending even if you forget to turn it on yourself. The easy-to-use interface is another aspect worth praising as it makes it perfect even for first-time owners.

It provides you with easily understandable tissue-loading graphs and ascent-rate graphs. When it comes to the warranty that accompanies it, know that the manufacturing company backs it during the first 2 years after you purchase it.

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7. Mares Quad

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The Quad is truly a modern tech that you should not go without, the decompression dive planner with user adjustable surface interval keeping you safe and helping you enjoy the most out of each underwater session.

It features only 4 buttons that grant an intuitive user interface, which makes it perfect even for beginners. The maximum displayed depth is 492 feet, and its memory capacity is up to 38 hours. It features an ascent rate digital indicator that can either be set to meters per minute or feet per minute.
Tehcnologies and standout features:

• Segment display: Readability is granted by the segment display and the smart overall design it boasts as the displayed information are large-sized for easy viewing.
• Gas switching: You can set it up to include one or more oxygen-rich gases besides your main gas, thus granting shorter decompression times as you switch gases.
• Software upgradeability: You can upgrade the computer whenever Mares provides a developmental update.

The neat backlighting makes it easy to read off the screen even in darker areas underwater. It even displays water temperature so that you are kept aware of all conditions. The battery boasts a long lifespan of approximately 200-300 dives and is easily replaceable when it runs out of “juice”.

It even features a battery power indicator that keeps you updated with its status so that you won’t be caught off-guard by the depleted battery. Furthermore, the manufacturer backs it with a 2-year warranty against defects.

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8. Cressi Giotto KS740052

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The clean display of this wearable makes it easy to use as it is not stuffed and you are not bombarded with abbreviations you would not have understood if you were a beginner. Furthermore, the advanced information it displays makes it equally good for professionals, so there are no limitations when it comes to who it can be used by.

It features three buttons that are easy to access and allow you to press them even when you are wearing thick gloves. The battery of the device can be easily changed, so there is no need to take it to a professional shop or service center. The audible and visual warnings it provides announce you when perilous situations arise so that you are always safe.

It can handle oxygen levels ranging from 21 to 99 percent when it is set in the Nitrox mode, and its pO2 limits are adjustable from 1.2 to 1.6 bars. Operational until you reach a depth of up to 120 meters, you can descend freely without worrying too much about how deep you go. Reasonably priced considering the specs it boasts and delivering a near perfect performance, it is an option we recommend you do not overlook.

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9. Cressi Leonardo FBA_KS770050

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Featuring the RGBM algorithm, this device permits safe decompression calculations for numerous descends, making for a great choice when you go traveling and cannot afford to lose time on changing settings or generally tending to it. To enhance your safety while diving, it features an onscreen indicator that displays a stack of arrows, guiding you to ascend in the best conditions possible.

Designed to be as straightforward as possible to that inexperienced scuba divers won’t have a hard time figuring out its operation, it allows user replacement of the battery. This does not only spare you from time lost going to a professional service shop but money as well. The wide display allows you to easily read the data on it, its segmented dot matrix taking the guesswork out of using the device.

One of its main selling points is the one-button user interface which provides the most simplistic operation possible. In case it gets a bit too dark when you are underwater, you can opt to turn on the backlight and read the info displayed on the screen with ease. Additionally, it puts three operating modes at your disposal so that you may have a smooth experience when diving.

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10. Mares Puck 414117

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It is the Mares Puck that took the scuba diving world by storm when it first came out as it came with the most innovative features at that time, and its precision and dependability was basically unsurpassable. As time passed, other devices have appeared which are better than it is, yet the Puck still maintains its place among the best entries on the market.

Undoubtedly, this is the best budget option to go for as it comes at a cheap price when compared to its direct competitors. The simplistic yet reliable interface makes it great for hobbyists and inexperienced divers alike. It puts three functions modes at your disposal, and it can support Nitrox between 21 and 50 percent.

To add to its convenience in use and appeal, it comes with watch, date, and temperature functions, so you can use it while you are underwater just as easily as you can use it while you are on land as long as temperatures do not exceed the range it can tolerate. When it comes to its internal descend log, this device shines once again as it can store up to 38 hours of material.

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Underwater Safety Considerations

While exploring the underwater domain can prove to be one of the fascinating experiences to ever behold, it is just as dangerous. The unmapped territory and the thrill of the unknown are what drive people to spend as much time as possible as often as they can underwater, but they must take a lot of safety precautions when doing so as the water can truly be a cruel mistress to those who are unprepared.

No matter how experienced you are, if you are an entry-level diver or a professional, one gear you should have on you at all times is the diving computer. It prevents decompression sickness and it helps guide you when it comes to the right amount of time you should spend underwater so that all decisions you make when diving are informed and based on precise calculations. It might be a small device, but it really packs a punch, that’s for sure.

We have already explained how the wearable works, so you are aware of why it is trustworthy and just how much more it makes your life easier as it takes complicated calculations off of your hands. Instead of having you slave for hours figuring out how long the diving session should be and how far or deep you should go, it displays in a matter of seconds the information to keep you updated with your situation.

Taking into consideration the fact that it automatically picks up time and pressure, safety is further enhanced as these are parameters you are unlikely to guess with a high level of precision on your own before starting the expedition.

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Rating Our Picks

Water Resistance

The water resistance rating shows what the maximum depth you can reach while wearing it is. Obviously, for an experienced diver, it is better for the maximum depth to be bigger, while a beginner could just as easily go for a device which does not allow him/her to go further underneath.

Operating Temperature

Another important rating element that influenced our depiction of the best products in this niche is operating temperature as this stat shows under what conditions the device can be used. Obviously, it is best for the temperature range to be more generous in order for the device to be dependable in all situations.

Log Book Memory

The memory of the log book shows how many hours can be stored on the device. When the limit is reached, you must transfer the data in order to not lose it, or delete it completely in case you are not interested in saving it for further evaluation.

Backlight

The backlight allows you to see what info is displayed on the screen with ease even when there are very poor lighting conditions. Seeing how the underwater environment is quite different than the above-ground one, poor lighting being an often occurrence, this is a vital feature.

Audible Alarms

Audible alarms are triggered in situations where your attention is needed as it is time to ascend or something else has happened. As you are diving, you won’t always pay attention to the wearable device, so it is important for it to signal you when an unwanted situation arises for you to be kept safe throughout.

Low Battery Indicator

When the battery runs out of power, the device obviously turns off. As this happens, you are not aware of the parameters of the diving session anymore and you must get out of the water to not risk running out of air at an inopportune moment. This is where the low battery indicator comes in, announcing you beforehand that the battery does not have much juice left for you to use the wearable and ascend in perfect conditions with its help.

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Why Scuba Divers Need It

Continuous Decompression Status Tracking

The main purpose is to help you avoid decompression sickness, an uneasy feeling that makes some people stay away from underwater diving for long periods of time as it scares them. Tracking your theoretical in-gassing and out-gassing of nitrogen based on your body, it tracks all the important parameters throughout the changing depth of the diving session to prevent the sickness that accompanies decompression.

Accurate Recordings of Depth and Time Parameters

One of the biggest challenges you are confronted with is accurately calculating the maximum depth and bottom time. Unfortunately, as you do the table calculations a lot of inaccuracies can occur. As you use it, this concern is eliminated as the device constantly and accurately records maximum depth and diving time, faulty info not existing anymore and your experience underwater becoming safer.

Easy to Understand Ascent Rate Indicators

The ascend rate varies from one situation to another, divers being instructed to ascend slowly as the table prescribes for maximum safety. Usually, the ascension rates range from 30 to 60 feet per minute, being mandatory for you to stick to them in order to avoid decompression sickness. Alas, the table is not dependable from this point of view as it does not provide accuracy, and it cannot predict the profile of the diving session. However, computers feature ascent rate monitors and warning devices which enable a smooth ascend each and every time you descend, thus enhancing safety.

Elimination of Errors

Errors can easily occur when you are using the table as you might tend to forget how to use it and do the proper calculations. Seeing how with the calculator you are not performing the calculations yourself as the device tends to this operation, automatically taking into consideration the decompression status as well, errors will no longer exist and you will have more fun when diving.

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Buying Guide

Making the right pick is not as easy as it seems. In theory, the wearable might have the role of making your life easier by eliminating the need for you to do any calculations, and it might considerably enhance the safety of your diving sessions, but this does not mean that all devices are alike and that their performance is equally impressive.

Obviously, you would not want to take chances and end up with a decompression computer that does not perform as expected, the reason why we put together a comprehensive buying guide for you to follow. As long as you answer these questions before you go shopping and keep your answers in mind when you make the ultimate pick, you will be pleased with your option for sure.

1. What Is My Diving Level?

   Clearly, the first question you must ask yourself and answer to truthfully is what diving level you are at as the entire design of the device depends on this question. If you are a beginner or a hobbyist, a simple device is a right choice as you will not have to waste time underwater figuring out what the abbreviations on the screen stand for. On the other hand, if you are an experienced diver, it must come with more advanced features like trimix capabilities, for example, enhancing your experience when you are underwater.

2. Is It Easy to Use?

   Regardless of your diving experience, one thing is for sure – you do not want to end up with a device too hard to use and that will have you waste time switching between settings and operational modes. Thus, you must be on the lookout for user-friendly design and interface. One of the main highlights of a simplistic device is a big display that does not use intricate abbreviations, and easy to press buttons which allow you to toggle between selections even when wearing thick gloves.

3. Can It Operate When There Are Harsh Temperature Conditions?

   Sometimes the water will be quite friendly temperature-wise, while at other times it will feel like it is freezing. Make sure that the model you do pick can withstand colder temperatures as well as normal temperatures, as you surely do not want to have to cut your diving session short because of this circumstance.

4. Is It Easy to Read the Displayed Info Underwater?

   Seeing how the environment underwater is completely different than it is above ground, you have to take into consideration the fact that there will likely not be the best lighting conditions at all times. Thus, you will not have an easy time reading the data off of a small screen. To make sure you will be satisfied with your purchase, you should go for a model with a wide-size screen onto which information is clearly displayed.

5. How Much Am I Willing to Spend On It?

   Of course, you must set a budget before you start browsing to make your life a bit easier. This way, you will eliminate products that are way above your pay grade, and you will have a more realistic look at what models you can and cannot buy. While these devices are more than important for scuba divers, this does not mean you have to sacrifice too much when purchasing one as a cheaper product could be just as great performance-wise as a more expensive one. Just take your time, do the proper research, and you are sure to find the right one for you.

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Frequently Asked Questions

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Conclusion

As now you are well aware of the importance of wearing the diving computer when you go on your underwater expeditions, it should be more than clear that you cannot afford to go underwater without it. Seeing how we put your safety and convenience on top of everything else, we took our time and tested each product to deliver a truthful depiction of the best products in this niche.

Best Dive Computer for Sale: Shearwater Research Teric

With 5 operating modes (gauge, freediving, OC technical, OC recreational, and CC/BO), the Shearwater was a no-brainer for the top spot. It is costly, but this is actually a pro-grade computer that serves those who dive at a professional level or to make a living better than it suits beginners and hobbyists, so it is understandable why it costs more upfront as opposed to competitors. Moreover, despite the complex operation and the safety enhancement it provides for your underwater adventures, it is actually quite intuitive to use.

Editor’s Choice: Oceanic Geo 2.0

Able to uphold the info afferent to 99 dive sessions, the Geo 2.0 easily impressed us as it proves to be a useful tool for professional and beginner divers alike. When you go too deep and the situation might ultimately get out of control, it flashes a LED light to warn you and return to the surface slightly to stay out of harm’s way. However, an aspect that impressed us a lot is that it preserves your diving data even after battery change ensues, so your precious info won’t get lost as long as you need it.

Best Dive Computer for Beginners: Aqua Lung i300

Professionals have prior experience in using these diving tools, so they can work with a more complex device with no issue, but for beginners, a user-friendly interface is needed, one that the i300 provides best. It features 4 operating modes so that you set it depending on the exact activity you undergo during your time spent underwater to maximize results. To keep you safe and ensure everything turns out well, it provides comprehensive ascent-rate graphs as well, so you know exactly when and how to proceed to safely get out of the water.

Best Dive Computer for Recreational Diving: Cressi Giotto KS740052

Another reliable pick, the Cressi Giotto provides you with important diving info up to 120 meters underwater. Able to hold information for up to 60 diving sessions, it is the model most people prefer for recreational diving as it is easy to use and doesn’t cost much either, which is perfect considering that it won’t be used intensely or at a professional level. Providing audible and visual alarms to keep you out of harm’s way when you are exploring the depths of the sea, it is a tool you shouldn’t go without if you care for safety.

Best Dive Computer for Freediving: Suunto Zoop Novo

The Zoop Novo undoubtedly shines brightest as it allows you to store up to 140 hours of diving sessions in its log book and it can operate in harsh temperature conditions without a problem. Furthermore, it is designed to be easy to use and its display is clean, allowing you to effortlessly view the info it provides.

Best Dive Computer with Navigation: Scubapro Z1

Likely among the most dangerous debacles you can get into is straying from the general path you establish as the underwater environment is tricky and there’s not much that you can use as guidance. To prevent this occurrence, the Z1 uses a digital compass that makes it easy for you to navigate even in areas where you have never plunged before. Furthermore, to tailor to the experience you are about to follow through with, it provides specialized operational modes in accordance with the activity that will ensue, more precisely freediving, scuba, and gauge.

Best Dive Computer for the Money: Mares Puck Pro

Among the cheapest options in the top-tier section, this Mares entry is actually quite interesting in terms of use as it allows customization and the creation of personal profiles so that you tailor it to the type of diving experience you plan on adventuring in. Moreover, it can store upward to 36 hours of logs from your dive sessions so that you go back and review your sessions whenever needed.