Dive Computer Expert Reviews
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Oceanic Datamask HUD was introduced to the diving community few years ago. This scuba diving equipment consists of dive mask and computer embedded in it. By means of sophisticated optical system you may easily observe all dive data right in front of your eyes!
I knew one merry chap who had DataMask HUD dive computer and according to his words – he would never go back to consoles or wrist dive computers again. He was so much in love with his DataMask that he couldn’t ever listen to other guys talking about their multigas wrist dive computers with multiple transmitters even for a mug of beer!
He was doing underwater photography and as you may imagine his routine, he badly needed his hands to be free. And Oceanic DataMask did it all for him! While his hands were busy with cameras and strobes, his eyes were busy enjoying the underwater views and at the same time watching all necessary information about his diving conditions! Isn’t it nice! Only sometimes, if he wanted to see alternative information (alternative display) during diving, he could engage his hand to press just one button, all other time – total freedom!
Copy this Oceanic DataMask HUD Features & Alarms Card for you Reference & Share with your friends and buddies!
Dive computer has 2 buttons for setting and retrieving information. They are quite sensitive so you won’t disturb and interrupt your view when pressing them.
During dive you will be presented with 2 bar graphs. Display shares one graph for both to show you either TLBG (nitrogen loading) - icon TL and thin line - ‘left border’, or O2BG (oxygen accumulation) – icon O2 with ‘right border’ line.
Oceanic DataMask doesn't have special bar graph to represent your ascent speed, so it gives you only message 'SLO" and audio if the ascent rate is more than allowable at the certain depths.
Before diving, let's set Oceanic DataMask HUD for desirable dive mode and all related parameters to it. All settings divided into certain groups, like Utilities, Alarms, FO2, time. Below you may see a summary of what we may adjust:
Oceanic DataMask HUD: Diving With Air & Nitrox
During diving you will have a choice between main (default) display with all relevant information to certain mode and alternative displays. Alternative displays easily accessible by pressing ‘top’ button.
Copy this Oceanic DataMask HUD NO-DECO Displays Card for you Reference & Share with your friends and buddies!
If Safety Stop (SS) was enabled – you will get audio alarm to stop after reaching upon certain conditions during dive. Safety Stop has as well main and alternative displays with all information related to those conditions and the most important in that case are:
All other values that displayed in Safety Stop mode are similar to No-Decompression displays when diving with Air or Nitrox.
Oceanic DataMask constantly monitors ascent rate and if you ascend faster than alowable maximum at certain depth - dive computer will sound an alarm with message 'SLO' - it is all perfectly visible and annoyingly loud!
If you have transmitter installed and paired - all data related to tank pressure and Air Time Remaining (ATR) will be monitored and displayed.
If you get to situation when ATR will be 5 minutes left - computer will sound audio to warn you. But it calculates ATR with reserve, which means that even in case you need to perform Safety Stop or Decompression Stop - you still have enough air in your tank to reach surface, and amount of that air will be as you adjusted End Pressure Alarm set point.
PO2 and O2 are under constant monitoring as well, and if certain conditions exist - dive computer will give you appropriate alarms with all information displayed.
If we exceed our No-Decompression Limits (NDLs) - Oceanic DataMask will activate Decompression mode. After this we must ascend to displayed depth (first deepest deco stop) or a bit below and decompress for the displayed time.
At this moment main and alternative displays will show relative dive data to the Decompression mode, and below is a summary:
During Decompression process you may create, so called, violations, like Conditional or Delayed. This happens if you ascended to shallower depth than displayed, stayed there for some time and didn't correct your position within 5 minutes.
In this case you will have penalty time that is added to required stop time.
Other violations may happen if Decompression Stop depth required is deeper than 18 meters or if you ascended deeper than operational depth of Oceanic DataMask, which is 100 meters.
Oceanic DataMask HUD: Diving In GAUGE Mode
In Gauge mode dive computer operates as a depth gauge and timer only, it doesn’t perform calculations for either nitrogen and oxygen.
During diving following information will be displayed on the main and alternative screens:
Oceanic DataMask HUD: FREEdiving
During freedive Oceanic Datamask calculates nitrogen loading according to fixed default FO2 of Air. When you set FO2 for diving in Nitrox – this value doesn’t make any effect on FO2 for freedives.
Before freediving, first you need to set certain parameters for this kind, while on surface. Those parameters are:
During ‘Freedive’ mode you will have following information displayed on main and alternative screens:
You may easily access countdown timer (CDT) display by depressing top button. If CDT was set to ON and time decreases to 0:00 (min: sec) – dive computer would give audio alarm and special graphic to notify you about conditions reached.
During a dive you may certainly have Freedive Depth alarms (FDA) when you reach depth values that you adjusted at initial set up.
Elapsed dive time (EDT) alarm is factory preset. If you set it ON – Oceanic DataMask will give you audible alarms with ‘Time’ message displayed every 30 seconds underwater.
If you have any level of nitrogen from previous dives from the last 24 hours – TLBG is displayed. And moreover – when nitrogen loading level increases and you enter into the so called ‘Caution level’ (4 segments on TLBG) – audio alarm comes up and ‘UP Arrow’ starts flashing on the main screen – it is time to ascend!
If nitrogen level reaches Decompression level (5 segments on TLBG) – audio alarm comes up again with TLBG and ‘UP Arrow’ flash and also graphic ‘VIO’ (violation) will flash in the place of No-Decompression (NDC) time. ‘VIO’ graphic will stop flashing when you are on surface only.
This condition is a Permanent violation and Oceanic DataMask blocks access to Air, Nitrox, or Gauge modes until you stay on surface for 24 hours without any type of diving.
On the surface you will have an access following modes of Oceanic DataMask HUD:
It is worth to mention that freedives are not recorded into either Logbook or History. They stored into the internal memory and you may download freedive data to your PC.
Oceanic DataMask HUD: What Divers Say
It’s time to make our conclusion - we have known all Pros and Cons by this time - some of them are quite contradictory!
Oceanic Datamask HUD is definitely a great model especially for those people who need their hands free, like underwater photographers or archaeologists for instance, and it's recommended dive computer for them!
It is a fully functional hoseless air-integrated dive computer that certainly covers wide variety of diving activities. It is quite pricy and has few imperfections, though, (actually each dive computer has something that is not very satisfactory made), but it frees your hands!
Are you ready to pay the price for such a freedom?