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!
Aeris A300 is an advanced dive computer with Dual Algorithm, 4 dive modes, and possibility of setting up to 3 Nitrox mixes with FO2 up to 100%. This instrument came with interesting characteristic - diver can choose between NORM (Air, Nitrox) and TECH modes. The latter characterized with better flexibility in adjustments and possibility to set 3 Nitrox mixes, while NORM mode has simplified number of functions just to cover our recreational diving needs.
Copy this Aeris A300 Features & Alarms Card for your Reference and Share with your friends and buddies!
No matter that Aeris A300 is an advanced instrument - it is very easy to learn, set up and use. We can build a console on the base of this Aeris dive computer by adding submersible pressure gauge and compass to make fully featured NAVCON Aeris A300XT. As this dive computer has Dual Algorithm, someone may want to use it as a backup device for other Aeris, Oceanic, or even Tusa brands.
Aeris A300 has 3 control buttons: MODE, SELECT, ADVANCE.
Dive computer has 2 coloured bar graphs - TLBG (nitrogen loading), which is located at the left side of display and VARI (variable ascent rate), which is located on the right side.
User manual is structured well, so you won't find any trouble following it, even if it is your first dive computer. It was sent to us on CD, so if you sick of reading from PC - obviously, you'll need to print it out for your convenience! And that was the only discomfort, which we found when learning and diving with Aeris A300!
Aeris A300 is configured with several menus to make its setting process easier and more intuitive. And saying precisely - 5 menus:
User documentation is structured very well, so it is easy to understand. And by following that menu we may set next number of parameters:
Aeris A300 has RESET function that allows the diver to clear nitrogen memory. This feature can be a great benefit for dive shops, which give the dive gear for rent.
By using inbuilt Dive Planner we may plan next dives and dive computer calculates the NDLs according our nitrogen loading from previous dives, FO2 set point and Algorithm selected.
Aeris A300: Diving With Air & Nitrox
Aeris A300 turn on selected dive mode when senses depth about 1.5 meters.
As a dive computer, Aeris A300 operates in 4 modes:
For each dive mode this dive computer has main and alternative displays to show you all related data to any situation. To swap between them you need to press A-button for less than 2 seconds.
For SmartGlo activation - press S-button (the same button you will use to acknowledge alarms), and as this dive computer has Gas Switching option – M-button is designed to access Gas Switching function.
Copy this Aeris A300 NO-DECO Displays Card for your Reference and Share with your friends and buddies!
In No-Decompression Mode you may have Deep Stop prompt if Deep Stop option was set to ON before. In this case Aeris A300 will display values related to Deep Stop function, like Stop Depth and Time, and Stop icon (bar and arrows).
If you set Safety Stop function to ON – dive computer will prompt you by beeping and displaying attributes for Safety Stop, like Safety Stop icon (bar and arrows), Stop Depth and Time counting down.
Deep and Safety stops have main and alternative displays, which diver may access by pressing A-button.
Dive computer constantly monitors our levels of PO2 and O2. And if certain conditions do exist - A300 switch on specific alarm with according display.
During the dive you may exceed No-Decompression time and depth limits. In this case instrument will activate Decompression Mode – audio alarm will come up and all segments on TLBG, UP Arrow icon and alarm LED will flash.
After having that, you need to ascend safely to the required depth, shown on the display, or a bit deeper, and stay at that depth required time that is shown as well. When you complete required Decompression time, next shallower Stop Depth will be displayed and you may ascend to that level to continue decompression process, and so on.
To assist us completing decompression correctly, Aeris A300 has main and alternative displays (4 of them all together) with all information we need. Below you may see the summary of Decompression Stop main and alternative displays:
It happens sometimes when you may create violations during Decompression Mode, like Conditional Violation, for example. It means that you ascended to shallower depth than required for Decompression Stop and maybe stayed at that shallower depth for a while. In that case you won’t get any off-gassing credits but instead you will receive a penalty time that must be worked off before, actually, off-gassing credit may be acquired.
To help us out in violation situation Aeris A300 has specific displays with information listed below:
When you descend to required Decompression Stop Depth and stay within stop zone – you will get full solid Stop icon (Stop Bar and Down/Up Arrows).
Other DECO violations include:
During single dive (in TECH mode only) you may switch gas mixes easily in appropriate moment. Aeris A300 gave me an alarm with preview display. By using A and M buttons to walk through the gas menu, and using S-button, I selected required gas, and all calculations started for that mix. It was easy and intuitive!
Aeris A300: Diving In GAUGE Mode
If Aeris A300 dive computer was set for GAUGE Mode, it will work as a depth gauge and timer and won’t calculate nitrogen and oxygen accumulation.
Below is an example of the displayed information from main and alternative screens when diving in Gauge Mode (to access alternative displays – press shortly A-button):
If you want to interchange Elapsed Dive Time with Run Timer - press M-button.
Aeris A300: FREEdiving
You may use Aeris A300 dive computer for freediving, because it has set of special alarms and features to assist you during freediving. When set for FREEdive mode, instrument calculates your nitrogen and oxygen exposure that you may have from previous dives, and those figures are based on selected algorithm and FO2 for Air.
To use this dive computer for freediving you need to set FREEdive Mode and access and customize special functions available for freediving activities, like Countdown Timer (CDT), Freedive Elapsed Dive Time (EDT) alarm and Freedive Depths alarms.
Countdown Timer (CDT) may be set and toggled between ON/OFF. During freedive you may easily view CDT status on the alternative display and then Start it or Stop it.
Freedive Elapsed Dive Time (EDT) alarm is different thing from Elapsed Dive Time (EDT) alarm as you set it previously for NORM/TECH modes.
Also Aeris A300 allows us to set 3 Free Depth alarms, each at progressively deeper depths. Set points are in a range from 10 meters to 100 meters (30 ft – 330 ft).
Below is a summary of dive data that you will get during freedive from main and alternative (3 displays all together) displays (to swap between main and alternative displays – press A-button shortly):
Also, each Freediving alarm, which we set previously, will give us its specific type of display with all related information.
If you have High Nitrogen alarm during freedive - 14 segments of TLBG will flash with audio alarm. If level of nitrogen increases to DECO condition - dive computer will display full TLBG with audio, and graphics UP and VIO flashing. When you resurface - Aeris A300 scuba dive computer will lock itself to Violation Gauge Mode (VGM) for 24 hours, meaning that you need to stay out of any sort of diving.
After the Transition Period you will have access to following modes of this Aeris dive computer:
Aeris A300: What Divers say
Aeris A300 is an advanced dive computer that allows user highly customize it for specific diving scenarios and dive technical, or quickly set it to basic recreational diving.
During our test dives we found it very reliable, accurate, and easy to use. Display was easy to read, audio alarms were loud enough and visual alarms were great help.
User manual is well-structured, and it was easy learn and follow.
You may definitely invest in Aeris A300 as it can be recommended dive computer for recreational and technical diving. You will find it accurate, reliable, and user-friendly with variety of functions that may have other dive computers with higher price. Dive computer will work well as a backup device and as a training platform, because its CLEAR nitrogen memory function. That's why dive shops may consider it as an instrument that is possible to give for rent and earn some money!