Dive Computer Expert Reviews
Saving Your Precious Time And Finding The Best Dive Computer For You

Dive computer reviews are perfectly organized and consist of fully researched information and ratings of Aeris, Cressi, Mares, Oceanic, Sherwood, Suunto, Tusa, and UWATEC/ScubaPro brands.  In Catalogue Section you may compare any models side-by-side and select dive computer according to your needs! Join thousands of happy customers!

FAQs & Answers About Dive Computers



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Does Mares Icon HD work with transmitter made by Oceanic?

Different producers recommend using only corresponding wireless transmitters with their dive computers. So, it is very advisable using dive computers with transmitters of the same brand. And Mares Icon HD won't work with transmitter made by Oceanic. Diver's health depends on this - so don't put it at risk!

Could you tell me which dive computer(s) have the most liberal algorithm(s)

Oceanic brand is known to make the most liberal dive computers on the market. You may put Aeris & Tusa to the same area, as these brands are very similar. Cressi is also more liberal, but more to the middle, not as liberal as Oceanic, but not nearly as conservative as the Suunto. Suunto dive computers are the MOST conservative out there.

I'm curious about Cressi Leonardo wrist dive computer. Does it need a transmitter for your tank and how does it actually work?

Cressi Leonardo IS NOT an air-integrated dive computer. So you don't need transmitter for this model. And of course, Leonardo doesn't calculate and show NO data related to your air consumption.

Wireless air integration works as follows:

  • if you have compatible dive computer and appropriate transmitter - you will pair them using dive computer settings. This process works kind of like you pair your mobile phone and bluetooth;
  • you need to enter into the dive computer transmitter's serial number that works only with this one transmitter, and like specific link code. Before a dive you need to place transmitter on a regulator first stage, following certain rules;
  • that's all - transmitter can read air pressure from your tank and transmit its value back to dive computer for display and calculations


You may have dive computers that support up to 3 transmitters, so you need to pair them all for correct display and calculations. And with few transmitters you may even check your buddy air pressure, if his/her transmitter correctly paired with your dive computer, and you swim close enough for your dive computer to pick up a signal from transmitter.
Examples of such dive computers - Aeris Elite T3, Aeris Epic, Oceanic VT3 and VT4, Oceanic OC1, Tusa ZEN Air, UWATEC Galileo SOL.
But you should be aware that Oceanic VT4, Oceanic OC1 dive computers shipped from November, 2011 don't support "Check Buddy Pressure" function anymore.

I'm not very good in English and don't understand from user documentation how I can set FO2 on Oceanic OC1 dive computer. Could you give me short description how to do it?

First of all - start with Oceanic OC1 dive computer interface. This computer has 4 control buttons - M(mode), S(select), A(advance) and L(light).

To set Nitrox we need 3 of them - M, A, S.

Procedures for setting FO2 for all mixes are similar, only difference between 1st and 2nd, 3rd mixes is that you will be able to set FO2 up to 50% for the 1st mix. 2nd and 3rd gases allow you setting FO2 up to 100%.

So, when you are on surface:

  1. press M to access Menu System from Surface Main display;
  2. find Set F Menu by pressing A button to step forward through the selection or press M button to step backwards through the selection.


By pressing those buttons you will see small arrow goes up and down on the screen.

When this arrow will point to Set F Menu - press S button to select it and enter into this menu. You will see few Set Points available for adjustment:

  1. FO2 for mix 1;
  2. FO2 for mix 2;
  3. FO2 for mix 3;
  4. Default FO2


Now you should select which mix you want to set:

  1. press A or M buttons to move around this F Menu;
  2. press S button to select desired gas mix.


Here is an example how to set FO2 for mix 2 that is in your tank#2. Let's imagine that we have already set mix 1 for Air (FO2 - 21%) and we are at the Set F Menu.

For mix 2 do the following:

  1. press button A to step down through the menu and you will see arrow points to FO2 for mix 2;
  2. press S button to Select FO2 for mix 2 and you will get the display with settings for FO2 for mix 2;
  3. if you press and hold A button - set points will roll from 21% to 100% of O2; if you just press A button - you will be able to change set points one at a time from the lowest 21% to highest 100% of O2;
  4. when you get to your desired set point that is corresponding to O2% of your tank with mix 2 - press S button to save that setting and revert to Set F Menu.


During O2% adjustment Oceanic OC1 dive computer will display allowable maximum depth for your chosen setting and PO2.

For mix 3 you do the same - from Set F Menu - select mix 3, by pressing S to enter its adjustment menu, go through the numbers by pressing either A or M buttons, then make a correct selection of FO2 for mix 3 that is corresponding to O2% in your tank where you have mix 3, press S button to save the set point and return to Set F Menu.

This guide was written in 2011, so everything mentioned here was valued for that period. Oceanic could made some modifications to user interface and setting procedures, so if you have newer model of Oceanic OC1 - check closer with your current user manual.

What is the difference between Mares Puck & Puck Pro?

First of all - Mares Puck Pro has new look, larger and different display layout, and control button is on the side, not on top, like in Mares Puck.

Second - as its name "Pro" implies, new dive computer allows user to dive with 2 gas mixes with FO2 up to 99%.

Next - memory capacity. If Puck allows to store up to 40 hours with 20 sec sampling rate, Puck Pro makes it possible to store maximum 35 hours with 5 sec sampling rate.

Also Puck Pro has nitrogen bar graph (NiBG) at the bottom of the display. It consists of 10 segments and shows to the diver nitrogen loading and how close to the DECO.

Does Oceanic OC1 support "buddy pressure check" function?

As stated on Oceanic website:

"OC1 units shipped after November 1, 2011 no longer feature Buddy Pressure Check."

Newest versions of Oceanic OC1 don't support "buddy pressure check" function. Oceanic explains its decision, that in order to check your buddy's air pressure you really need to get very close to your buddy's air tank. And sometimes it can be not very convenient. That's why they took away this function.

If someone still wants to buy Oceanic OC1 with "buddy pressure check" function - look for older units, and they may be secondhand, of course.

Why you don't charge people for using this website and its information?

Charging people for using website and its information? This portal is free for all. That's my hobby and I won't charge people for my hobby. I remember myself when I was looking for my first dive computer, and that time nobody asked me to pay any cent for help. Why should I? It is totally against my own policy!

I'm only asking for your kindness to spread the word around your friends and buddies about Dive Computer Wizard and leave your review about dive computer of your choice, if you have what to say! And let other divers to learn something useful from your experience! Let's make this portal more useful for everyone and user-friendly, like many dive computers around us!

What's the best dive computer?

There is no straight answer to this question that pin-points to the certain specific model of dive computer. I think that the best dive computer is the one that totally suits you needs, and you don't regret about investing in this model.

By using Dive-Computer-Wizard.com portal you will be able to select the best one that perfectly serves your needs.

How many transmitters Suunto D9 supports?

Suunto D9 supports only 1 Transmitter for 1st gas mix.

Is it possible to dive with Suunto D6 to 50 meters deep?

Yes, it is possible to dive with Suunto D6 to 50 meters. Maximum operational depth of D6 is 100 meters, and the depth display range is from 0 - 150 meters.

What Is It Liberal & Conservative Diving?

Saying briefly, among other modes, dive computers have No-Decompression and Decompression modes. And it's always recommended that diver should stay within No-Decompression Limits (NDL).

In No-Decompression mode, dive computers (based on the composition of the breathing gas mixture, depth and time spent on it) calculate so-called No-Decompression Limits (NDL) - the time before a diver can freely (without going into the Decompression mode or even get into the bends - decompression sickness (DCS)) ascend, to complete the dive with safe ascent speed. The shorter the NDL, the lower the risk of DCS, a dive computer (algorithm / decompression model) is considered more "conservative", and vice versa - the longer the NDL, the higher the risk of DCS, a dive computer is considered to be more "liberal".

It should be said that such a division does not speak about the shortcomings or advantages this or that algorithm. Simply "conservative" dive computer is more suitable for beginners. In case of major errors by novice divers at depth, instrument sensitively reacts to them and will give comprehensive recommendations to ascend safety. Experienced divers prefer "liberal" devices that allow you to control the degree of possible risks by staying longer at the greater depths and allows freedom of action within reasonable limits.

Strict boundaries between these two algorithms do not exist, because they have the potential to adjust their decompression models in varying degrees.

Is Mares Nemo Wide air-integrated dive computer?

No, unfortunatly, Mares Nemo Wide is not air-integrated. And as far as I know, Mares doesn't have plans to add air integration to this model.

I can't find how to turn the backlight on Suunto ZOOP. Does this dive computer have it or not?

Suunto ZOOP doesn't have backlight function. It has phosphorescent display instead. So, in case of night diving or any time you need, just light up the display by your underwater torch - it will stay lit for a while.

Can I dive with Oceanic Atom 3 without wireless transmitter?

Of course, you can dive with Atom 3 without wireless transmitter. It's display won't show air consumption related data though. So, if you still want to know your tank pressure - have a submersible pressure gauge (SPG).

Can I use Aeris XR1 NX use as a backup device to Mares Nemo Air?

I wouldn't do that! These dive computers are using different algorithms. So computations will be different!

Aeris XR1 NX can be used for backup to Aeris, Hollis Gear, Oceanic, and Tusa brands, as many of them use modified Haldanean algorithm or Dual Algorithms.

Does Oceanic Geo 2 work on MAC?

Should work. You just need to download specific driver. Check this website: http://www.mac-dive.com/devices.php

How different are Oceanic VT3 and Aeris Elite T3? And whether VT3 has a compass?

These dive computers are mostly the same, and having different names, they were made by companies that belong to Pelagic Group.

The most striking difference is how they look and price. And that's probably all.

Oceanic VT3 doesn't have integrated digital compass, but VT4 has. Also Oceanic VT4 designed with Dual Algorithm, Deep Stop has an option to be set ON/OFF, and ability to be programmed with 4 gas mixes.