Best Dive Computer – Complete Buyers Guide

When I first started diving, I had no choice but to rely on dive tables. The technology simply did not exist to allow for anything else, well affordable technology at the very least.

Then dive computers began to become more reasonable for the average diver and began to become more popular.

I will admit that when other divers first started using them, I was a bit skeptical. Having gotten used to the dive tables, I didn’t really feel like I needed anything else.

After just one use, however, I was converted.

Since I know just how much such a device can do for you, I would like to introduce you to some of the best dive computers on the market.

Dive Computer Reviews

1. Suunto Zoop Novo Wrist Scuba Diving Computer

If you have ever researched dive watches, it is essentially impossible to do so without coming across the Suunto brand. This is because they have managed to do some truly revolutionary work in terms of dive computers. In particular, they are known for their very own RGBM algorithm.

This algorithm is geared towards managing dissolved as well as free gas in the blood and tissues. Which allows you to get a more precise idea of what’s going on with your body as you dive.

This is an algorithm that comes preset with the Suunto Zoop Novo.

Key Specs

• Five dive modes
• Customizable settings
• Dive planner
• Audible alarms
• RGBM algorithm

If you don’t want to use this algorithm, you can choose the Gauge mode from one of the five modes available with this computer.

The other ones that you can select from include Air, Nitrox, Free-dive, and Off mode. It has got a nice mix there that is good for a variety of divers.

The Zoop Novo is activated from the second that you hit the water and records everything including all of the information relevant to your descents and your ascents.

You also get to play around with new, exciting features such as adding a bookmark for the dive log as well as deep stop for longer dives.

When you add this to the fact that there’s an in-built dive planner, audible alarms, and an easy to read screen, the Zoop Novo is a steal.

If you are looking to get started with a dive computer, I would recommend this as you will be starting off with the best.

2. Shearwater Research Petrel 2 SA Dive Computer

The Shearwater Research dive computers have become quite famous with divers all over the world. The Petrel is a bit of an older model but still one of my favorites. It has everything that you need and is easy to use.

Key Specs

• Air, Nitrox, Trimox capable
• 5 CCR gas diluent presets
• Constant PPO2 set point
• Logbook containing 1000 hours’ worth of dives

Therefore, if you do not want to be overwhelmed by various gadgetry, this is a great dive computer.

What I personally like about the Petrel is the large screen. Just one glance and I get all of the information that I need to know.

While it may seem quite bulky, it fit on my wrist quite well without being overly flamboyant.

Whether you are a recreational diver or a serious deep diver, the Petrel is going to come in handy.

This is because it is air, Nitrox, and Trimox capable.

It doesn’t matter what you dive with, this dive computer has got you covered.

It also boasts a constant PPO2 set point and allows you to choose from five CCR diluent gas presets.

It also records the last 1000 hours of your previous dives. This can come in pretty handy if you are the type of diver that is always learning and improving.

There is no denying that this is a pricey piece of equipment so it is probably more worth it for those who are technical divers.

For me this price is reconcilable only because I love how easy it is to set up as well as use underwater. There is no need to fiddle around to find what you are looking for.

All of the information is either simply there or easily found with a press of a button on this dive computer.

3. Cressi Giotto Wrist Computer

There is very little that you will find that the Cressi company is not involved with when it comes to dive.

It appears that dive computers are no exception. The Cressi Giotto may be the second dive computer that the company has attempted.

Key Specs

• Mixed gas dive computer
• Air, Nitrox, and Gauge mode
• Three button interface
• 70 hour dive log
• Large display

However, it is the first mixed gas one that has been wholly designed by them.

The Giotto is a strictly entry level dive computer but it is incredibly good at what it is meant to do.

You can choose from Air, Nitrox, and Gauge modes.

They have also worked out a new algorithm that allows for the safe calculations of decompression dives.

This is especially targeted towards multi-day dives with gas mixtures. There are two main reasons for my placing the Giotto on this list. The first is that this is such an easy dive computer to use.

The three button design of the computer means that it is simple for anyone to understand, program, and use. The HD screen is crystal clear with all of the information displayed in large text and numbers.

All you have to do is look at the computer once to get everything that you need to do. The second reason is that despite the simplicity involved, there are still plenty of features available. For instance, you are able to log in about 70 hours’ worth of dive times.

If you are planning on sharing this dive computer with someone else, there is no issue. All of the information is easily wiped clean.

4. Cressi Leonardo

The Cressi Leonardo is the model that precedes the Giotto. This makes it the first dive computer to be completely built by the brand.

Key Specs

• Three modes – air, nitrox, and gauge
• Adjustable fraction of oxygen between 21% and 50%
• PO2 between 1.2 and 1.6
• Single button interface
• 3 levels of conservatism
• Audio alarms

It does mean that you are taking a step back in terms of both price as well as features.

That being said, this would be my top pick for divers who are using a dive computer for the first time.

In particular, it’s great if you have to use a dive computer but aren’t looking for anything serious. In the words of Cressi, this computer is strictly meant for those who “just want to dive”.

Even the most basic dive computers can sometimes get a little techy.

Not so with the Leonardo – the computer doesn’t even bother using abbreviations! It’s simply a matter of pressing a button until you get to the category that you are looking for.

So, what does the Leonardo have to offer?

Programming capabilities for PO2 from 1.2 to 1.6, nitrox up to 50 percent, three levels of user adjustable conservatism, and altitude.

This basically means that you don’t have to worry about getting lost among the modes, graphs, and other technological mumbo jumbo.

It’s all straightforward and to the point with the Leonardo. There are also both visual as well as audio alarms for deep and safety stops as well as for approaching decompression.

To sum it up what I truly like about the Leonardo is that it provides you with all of the information that you need while still allowing you to have some fun on your dives.

5. Aeris A300 Wrist Computer

When it comes to the Aeris A300, appearances certainly are deceiving. It may not look like much but this dive computer is packed to the brim with everything that you could want.

Key Specs

• Dual algorithms
• 3 operating modes
• Three nitrox mixes

If you are a relatively new diver who feels as though they will progress further, the Aeris could be a good one-time buy.

It’s easy enough for novices to use but also has those features that experienced divers require. It’s got three operating modes – Air/Nox, Gauge, and Free.

The gauge mode comes equipped with a run timer.

You can also switch between up to three Nitrox mixes to 100 percent 02. There are individual PO2 alarms for these mixes.

The way that the information is presented with the A300 is a point of contention among some divers.

Yes, sometimes having to switch between all of those screens to find what you need can get a little annoying. This is more than compensated by the fact that all of the data is clearly displayed.

A great aspect of the A300 is the dual algorithms.

This allows you to dive both liberally as well as conservatively. You have also got a Conservative Factor setting.

This definitely improves the amount of safety provided by the computer.

The A300 also boasts three-colored bar graphs. This makes it a whole lot simpler to track your tissue loading and ascent rate. I also like the fact that it is nice and compact and fits on most wrists quite easily.

Really, what more could ask for?

6. Mares Puck Dive Computer

The Mares Puck dive computer is yet another I would recommend to beginners. This is because the features of the computer are streamlined to make them simple enough for anyone to use and understand.

Key Specs

• RGBM algorithms
• Air, Nitrox, and Bottom Time modes
• Precautionary dive settings
• 38 hours memory capacity

It also has a nice, large screen which is good for those who want to absorb as much information as possible with just one glance at their computer.

The buttons are also easily accessible, even if you are sporting gloves underwater.

All of this makes it a very fuss-free dive computer to use – a top priority for first timers. It uses the RGBM algorithm for calculations, allowing you to reduce the formation of microbubbles while still maintaining dive times.

The dive computer gives you access to Air, Nitrox, and Bottom Time modes, more than adequate for beginner divers.

The Puck can also be used in both fresh water as well as sea water.

The user can decide whether they would like the data to be displayed as metric or imperial units. There are also precautionary program settings available. This means that you can choose more conservative dive profiles, depending on your physical condition.

The Puck also has a memory capacity of 38 hours. If you are not looking for bells and whistles but still want a good variety of features, this is the dive computer for you.

The deal is sweetened even more by the affordable price tag attached to the Puck.

7. Cressi Newton Wrist Dive Computer

The Cressi Newton Dive Computer is an essential tool for underwater explorations. It comes packed with amazing features and reads information regarding dive, dive times, ascent rate, surface intervals or the need for decompression.

Its sophisticated software processes nitrogen absorption and release. This takes into account the quantity of inert gas that is contained in different mixtures for use. This information shows on the computer’s display. Through the priority compartment digit display, the device creates a direct dialogue between the diver and the device.

Key Features

• Dual-mixture RGBM algorithm
• Handles different hyper-oxygenated mixtures
• Visual and auditory alarms
• Dive program

The system of this device ensures a clear understanding of all the date needed at any given time and perfect readability in any situation underwater. The clock comes with a timer, chronograph, and a calendar. These are essential when diving for long sessions and help to track the necessary parameters.

The clock has a mathematical feature which makes saturation and desaturation calculations of dives taken with air or nitrox during any diving time. On this note, you can set all the parameters related to the mixture of your dive. Depending on what works for you, this device can be configured for either metric or feet system. In any of the systems, it still maintains accuracy when reading and displaying different parameters.

One of the features you will love about the Cressi Newton watch computer is the elegant design around the wrist. Also, the watch is lightweight and can work for everyday use. The metal components of this watch are titanium, so they hold up well in water.

If you are looking for a handy watch computer for regular scuba diving, this one works fine. The screen is easy to read, and the numbers are big enough to read even underwater. You can set the alarm clock and still enjoy the dual time function. Although it does not have a free diving function, it works well in all other aspects.

8. Oceanic Geo 2.0 Wrist Computer

If you are searching for a classy yet functional watch computer for scuba diving, then this Oceanic Geo 2.0 is a great fit. It comes with an upgraded look with a stainless steel accent ring and an interesting color combination. It comes in two color combinations including the sea blue decal and the sea blue-grey.

The watch features two nitrox to 100 % oxygen, deep stop with a countdown timer. Also, it has an intuitive user interface which has step back, time, temperature and date. These are essential parameters to track when diving and show your activity level as well as alerts on specific actions you should take underwater.

Key Features

• Audible alarm
• Four operating modes
• Dual time display
• Stylish design

If you need a watch computer for regular use, this one will work correctly. It has a robust yet lightweight construction such that you forget you have anything on. Also, it has an adjustable strap for a custom fit around the wrist. One other feature that stands out with this watch is the large display. It reads clearly in large numbers for visibility both underwater and out.

The watch suits use for recreational purposes as well as a day watch. It is small enough to match daily use and still track the essential parameters. It has two gas mixes which make it useful for underwater use. You can choose to breathe air or nitrox for your bottom gas and switch to your oxygen bottle on the way up. The best part is that the computer will not lock your out when it goes into decompression mode which allows you to dive longer.

9. Oceanic Pro Plus 3.0 Dive Computer

One of the things you will love about this dive computer watch is the large display. It is spacious enough to include the essential parameters and reads in large numbers for easy visibility. It comes with two buttons which make it extremely easy to operate. This feature makes it the best dive computer for beginners.

Key Features

• Dual algorithm
• Custom alarms
• Large display
• Intuitive user interface
• Deep stop

The Pro Plus is versatile under the water as it is topside. When starting to dive, the device displays your current depth, how long you can stay and the cylinder pressure. More to this, the watch computer comes with fantastic features that allow you to switch modes depending on what you need.

The dive computer features a push-button or automatic activation. The automatic feature comes in handy when you forget to activate your watch before entering the water. Additionally, it also has system and user-customized audible alarms which can work to your advantage when a potential danger arises.

The ultimate adjustable algorithm is an outstanding feature of this watch. It has color-coded bar graphs which provide you with complete control of your margin of safety. If you want to be extra cautious underwater, you only need to track and ensure you do not enter into the yellow caution zone.

The watch computer has a safety stop which features an audible and visual alarm when you approach 15 feet underwater. The automatic 3-minute timer counts down to zero to take necessary caution. In the dive mode, you still have access to other information, and you still have the option to disregard the safety stop function. It acts as an air computer but can be programmed for Nitrox mixtures from 21 % to 100 %.

10. Suunto Eon Steel Computer

The Suunto Eon Steel is a handy device for scuba diving. It has customized features with the display it comes with. It has a wide angle bright screen. It is colored for better visibility and has high contrast. You can easily read the large numbers for prompt action if needed.

Key Features

• Multi-gas diving
• Designed for technical diving
• Four operation modes
• Air/ nitrox/ trimix support
• Optional wireless air integration

The dive computer is always on an LED backlight which is easy to read underwater. Also, the display flips so you can read on either side of the screen. The quality of the dive computer is outstanding and comes in brushed steel bezel. Also, it features robust mechanical construction which is extensively tested for durability. It can stand up to 150 meters underwater.

With the rechargeable battery, the dive computer can last from 20 to 40 hours f dive time with a single charge. The good thing about this dive watch is that can connect over Bluetooth to the Suunto Movescount App.  Also, it allows for easy customization for easy use. The computer has wireless tank pressure from up to 10 Suunto Tank PODs. It is indeed a handy tool for a regular diver.

If you are looking for a scuba dive computer watch that works with all diving, then this one is the ultimate choice. It works with gauge, air, nitrox, trimix, and CCR. It also features no-decompression dive planner and a tilt-compensated 3D digital compass. You will love the customizing features of this dive computer whether you use it for training or advanced diving.

With this dive computer, it is easy to choose your preferred style with the bright and fully functional screen. You can agree with other users that it is indeed ideal for advanced scuba diving. The best part is that it has features that you can activate as you progress in your diving.

11. Genesis “Resource Pro” Computer Module

If you are looking for dive computer reviews, then this Genesis Resource Pro Computer Module comes with an intuitive display and operation with easy-to-read numbers. The bright screen displays the essential parameters when diving and you can easily access when you need to review. The computer can be used for both air and nitrox diving and has a gauge mode option.

Key Features

• Modified Haldanean/ DSAT Database
• Visual alarms
• Backlight
• 100 m depth display
• Replaceable lithium battery

This dive computer can be programmed easily to work in either imperial or metric mode. It comes water-activated, so there is no need to turn it on before getting in the water. With the replaceable battery, you can add a new one without the need for factory battery replacement. You have fewer worries about the battery running out and lacking access to a compatible one.

This computer can log up to 50 dives in its memory. If you wish to take on altitude diving, the computer automatically adjusts up to 14,000 feet. The maximum operational depth is 330 feet, and there is an automatic safety stop countdown timer. Another element that stand out is the digital and bar graph indicator for nitrogen, oxygen limits, and ascent rate.

When diving with this dive computer, it will display your dive time remaining and the current depth. Also, it will show in bar-graph form nitrogen loading and the current ascent rate. If you need decompression, the bar graph will indicate the deepest stop, the total ascent time, stop time and the depth of stop. Also, it will show the current depth and an up arrow showing the need to ascend to the stop depth.

12. Ratio Computers iDive Color Easy Dive Watch Computer

This scuba dive computer comes with different dive modes including air, nitrox, free diving, and gauge AVG. The design aims at providing a smooth user experience while featuring essential features for functionality.

Key Features

• Two mixes
• Stainless steel case
• 80 x 80 display resolution
• Integrated protection system

The watch comes with a shield which protects it from scratches and bumps. This ensures it withstands the harsh underwater conditions. In case it has small scratches, the soft shell of the shield heals, and in the event the scratches are obstructive, you can choose to replace it in minutes.

The design of this watch computer is smooth and features a dedicated slot for the shield to prevent accidental lift-offs. It has a stainless steel case which is indestructible and designed to last long. Additionally, it is polished for many hours to ensure a durable yet stylish design. The case measures 15 mm thick and stands up to 220 m.

The display of this watch computer is significantly bigger than most models available. Also, it clear and the numbers read in a large font for visibility. The best part is that you can set the backlight and the contrast of the display as you please. With the long life rechargeable battery, you can use the watch as much as you wish.

The IDive incorporates the real and complete algorithm to calculate the current tissue saturation and decompression profiles afterward. This helps to obtain reliable and safe decompression profiles. Unlike most dive computers, it does not make interpolation of stored data to calculate decompression profiles. It is just right with the features it comes with. With the automatic features, you have easy access to information without the need to set a single thing.

The Types of Dive Computers

For the purpose of this article, I’m going to focus on the two most relevant types of dive computers. I will also add in a little bit of information about some of the other options that you have.

To start off with, I would divide dive computers into how they can be mounted. The most common variations are wrist mounted and console mounted.

As you can imagine, wrist mounted is essentially wearing a watch-like dive computer on your wrist. This is a rather intuitive dive computer to have because many people are already quite accustomed to glancing at their watches every day. While this may mean that the screens are a little small, a lot of options available on the market today have found innovative ways to overcome this.

Then you have the console mounted dive computers. It is essentially a dive computer, pressure gauge, and sometimes even compass all rolled into one. These are considerably larger than the wrist mounted computers. They are attached to the regulator with a hose and are therefore connected to the rest of your equipment.

Although it has yet to really catch on, there are also dive computers that can be mounted on top of masks. Not a whole of companies offer this as an option. Also, many divers find it quite distracting to have a dive computer right in front of their face at all times.

You’ve also got air integrated dive computers. These are connected to your air source and sends information regarding your air pressure and breathing rate to the dive computer. For deeper or longer dives, this could be quite useful. It is also worth mentioning that these are quite expensive, however.

Choosing a Dive Computer

Now, that you know about the types of dive computers available to you, it’s time to choose one. Of course, you can save yourself a lot of trouble and just pick one from the selection above. Nonetheless, you should be aware of what you need from your dive computer.

Dive computers can vary quite drastically in price.

Now, if you are a seasoned diver who frequently heads down into the deep, it could be worth it to you to splurge on some serious equipment.

If you are a newbie, however, I would suggest starting off with one of the cheaper models. Once you are comfortable with that, you can move onto more sophisticated options later on.

I will say this, one thing that you should not skimp on is the Nitrox capability. This is easy enough as most dive computers are Nitrox compatible. More and more divers are opting for Nitrox because it helps your air supply last longer. Even if you are not using it now, you can be quite sure that you will be doing so in the future.

Therefore, do yourself a favor and get a dive computer capable of it now.

If you are not overly techy or don’t partake in technical diving quite often, stick with something quite basic. Avoid choosing computers that are overloaded with modes or features and just find something that you will actually be able to use. This becomes especially important once you are underwater. If you know what you are doing and like to have a lot of control with your dives, find computers that offer you a lot of adjustable custom settings.

I would also say the display is quite vital as well. Make sure that the information is clearly displayed as well so that you don’t get confused. You can’t afford any mistakes while you are diving. Alarms both audio and visual are equally as important to prevent any decompression sickness or other problems from arising.

How To Use A Dive Computer

Regardless of the dive computer that you have bought, there are some procedures that you will need to follow. This is to ensure that you use the computer properly and that you are kept safe at all times.

Here is what you need to know about using your dive computer:

• Always read the instruction manual – each computer is different and you should not get in the water with until you know how to use it. Don’t ever fall into the trap of feeling that you will learn as you use it. This is dangerous.
• Prep the dive computer properly – this means setting all of the necessary features, especially the ones that you will need to customize. This includes air or nitrox, alarms, the exact units you want displayed, etc.
• Always activate your computer. Some computers do this automatically as you enter the water while other require manual activation. Despite the features, make sure that the computer is working from the moment you enter the water.
• Take it on every dive. The only way that your computer can provide you with accurate information is if it is with you each and every time.
• If the computer stops working at any time during the dive, avoid continuing with the excursion. Instead, head to the surface to figure out what went wrong. If you cannot get it to work, you should get it fixed as soon as possible.

You are now an expert in dive computers and how to choose them. Use this information wisely and you will be able to come away with your ideal dive computer.