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!
Suunto D4i dive computer meets not only all the requirements of every recreational diver, but it is suitable for freediving as well, thanx to its dedicated mode. Its excellent menu and display layout allows us feeling comfortable underwater and on surface.
Suunto D4i allows us selecting a range of oxygen concentration in gas mixture from 21% to 50% and set the level of oxygen partial pressure between 0.5 and 1.6 bar. And it supports only 1 Nitrox mix. So, these parameters remain the same as in previous model.
Few more differences in settings - D4i doesn't have RGBM attenuation function and received contrast adjustment of the display. And the main difference from the previous model D4 - it's, of course, possibility to link a wireless transmitter and dive computer, which allows you monitoring air pressure and the amount of remaining air in the cylinder.
Copy this Suunto D4i Features & Alarms Card for your Reference and Share with your friends and buddies!
Suunto D4i - add to the functionality of the "old" D4 the use of transmitter and special software Suunto DM4, integrated with divers-net, and you get a very nice "little brother" of the family updated series D. Five color versions of the design will allow you to pick up your dive computer to suit your personality and style, and the new software will allow to share your dive history and profiles with other divers through the service Movescount.com
Below is the listing of the main differences between Suunto D4i and D4:
Suunto D4i dive computer has 4 control buttons on the interactive control console: MODE, SELECT, UP, DOWN. And they are located at the same positions as in D4. Thanks to well-written user manuals and user-friendly interface - it is very easy to learn all operations and buttons assignments. Programming and retrieving data can be made with short or long pressing on the buttons.
Dive computer's display layout may be divided on 3 areas:
Suunto D4i has two bar graphs:
Display layout is very intuitive, and just by glancing down - I could read it with ease!
Suunto D4i dive computer operates in 4 modes and we set all desirable parameters and alarms for TIME and DIVE modes. At this stage we could also plan our next dive, or check out dive logs:
Copy this Suunto D4i Settings Card for your Reference and Share with your friends and buddies!
D4i doesn't have integrated digital compass, like D6i and D9tx, but it doesn't diminish its beauty and functionality!
Suunto D4i: Diving With Air & Nitrox
After activation selected dive mode, Suunto D4i does all pre-checks, (it is recommended that we activate dive mode before diving for pre-checks) and if all correctly set for air or nitrox, and battery is fine - we are ready to dive.
Dive computer supports diving with only 1 gas - standard Air - FO2 - 21% or Nitrox - FO2 - 21%-50%. If I set D4i for Nitrox - display shows additional info that is related to this dive mode:
During diving with Air I didn't have those values, mentioned above, on display, of course.
Suunto D4i, like all others Suunto dive computers, have interesting function - Bookmarking. So, if I found need to create a certain profile point - I just pressed SELECT button. At that moment dive computer showed BOOKMARK # on display and that point was recorded into the memory.
D4i will show you main and alternative displays easily accessible by pressing UP/DOWN buttons, as shown in our infographics.
Copy this Suunto D4i NO-DECO Card for your Reference and Share with your friends and buddies!
As in previous model, this dive computer has reminders for Recommended and Mandatory Safety stops, and possibility to set DEEP Stop to ON/OFF. With DEEP Stop set to ON, D4i will still display Recommended Safety stops if needed. Safety stops are activated if you dive deeper than 10 meters, and the stop reminder pops up if I reached depth zone between 3-6 meters.
If I missed Recommended Safety Stop - I won't have any penalty or decrease in my bottom time or increase in surface intervals.
If you are about diving at altitude - Suunto D4i provides you with manual adjustment of the correct altitude values. It has 3 levels - from 0 meters to 3000 meters, and corresponding programs to these values - A0-A2 (the same as in Suunto D4). To make dive computer more conservative in calculations - I could set appropriate to my current conditions corresponding personal safety factor - P0-P2 (again the same as in Suunto D4).
If I set instrument for Nitrox - all calculations and display layout will reflect data related to this dive mode. And in addition to standard dive data, several other values will be displayed that are related to diving with Nitrox only. And to see them - press UP/DOWN buttons:
If I exceeded No-Decompression Limits (NDLs) – Suunto D4i would activate Decompression mode. All data that I will get after that is related to Decompression mode. During decompression I may be prompted to complete one or few decompression stops at a range of depths.
This Suunto computer (as well as other Suunto dive computers) has Continuous Decompression feature that allows divers performing decompression within the certain range of depths, so called Decompression range. It starts from the ‘floor’ (deepest depth where deco stop time won’t increase) to the ‘ceiling’ (shallowest depth) and decompression is done between them. This feature is similar and exclusive to all Suunto scuba dive computers.
During decompression stage Suunto D4i displays following data that is most important to us at this moment:
You need to follow dive computer guidance to complete decompression without problems. Suunto D4i manages deco mode perfectly and display itself, and all process is very intuitive and easy to understand. During decompression, Total Ascent Time decreasing, and ceiling depth goes up. Your deco stage ends and you may resurface only when ASC TIME, CEILING, and STOP symbols are not displayed anymore.
If diver, by some reason, ascend above the correct decompression ceiling, D4i will give an audio alarm with DOWN Arrow, current depth and ceiling depth values, and Error symbol. It means that diver has only 3 minutes to correct position and move to exact ceiling depth displayed or below the ceiling.
If you violate the decompression just out of curiosity or your oddity – scuba dive computer will activate permanent Error Mode and will work as a depth gauge and timer only and you must not dive for at least 48 hours.
Suunto D4i: FREEdiving
This dive mode makes Suunto D4i very attractive instrument for freedivers and spearfishing. In this mode scuba dive computer operates as a depth gauge and timer only, it doesn't provide any deco and wireless air integration information, and doesn't track diver's ascent speed.
In this mode Suunto D4i has 2 specific alarms that can be set only for freediving – one of them is Depth Notify and Surface Time Notify alarms:
In Freedive Mode, this Suunto computer displays following information:
Freediving Mode has function, called Day History. After diving you may access this history in SURFACE mode and view following information:
If you start new dive in Freedive Mode next day – Suunto D4i will reset all freediving day history and start all from the beginning.
When dive computer senses depth of 1.2 meters (in Scuba mode) or 0.5 meters (in FREEdive mode), Suunto D4i turns SURFACE display and shows:
At this stage we may be interested in following modes:
If during first 5 minutes after resurfacing I submerge, Suunto D4i will count this dive as a continuation of the previous dive.
Suunto D4i: What Divers Say
Suunto D4i inherited majority of functions from its predecessor D4 plus got wireless air integration with support of 1 transmitter. It has slightly different set of menus and options, corresponding to 4th operating mode. In D4i PLAN and MEMORY modes are separated, but in D4 PLAN mode included into MEMORY mode. Also D4i doesn't have RGBM Attenuation feature, like D4. And now we may adjust display contrast in Suunto D4i.
Dive computer operating manual is easy to read and follow, so even if Suunto D4i is your first dive computer ever - you won't have any troubles to learn this instrument. Documentation is structured very well, like in all other Suunto dive computers.
This dive computer has high level of being customized for different diving situations and it is another benefit, because it will give the flexibility of using it in air, nitrox, and freediving, and at the same time it provides us with all measures to keep us safe! All settings are logically structured, and with easy access diver can program any setting quickly.
With possibility of contrast adjustment and strong backlight - display is clearly seen under water and on surface even in sunny day. Audio alarms are loud enough to grab diver's attention.
Wireless works well - I had very short disconnections couple of times, but it was picked up back straight away, so I don't consider those incidents as downsides of this model, because it may happen with every wireless air-integrated dive computer!
With its reliability in service and operations Suunto D4i can definitely be recommended dive computer for every recreational diver and beginners in diving who require multitasking instrument for diving and stylish digital standalone watch!