Dr. Lecter
Contributor
What lb said. From what I recall, if you're spending the whole dive around 30' or shallower, it just doesn't trigger one.
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Hi Ron:
I’ve just returned from my second dive trip with my Cobalt working in tandem with an Oceanic OC1 (with wireless integration) as a backup unit. The unit is working great – but I’ve noticed one thing that I’d like your input on.
All of my dives are either two or three tank dives. The first dives – everything works perfect and the Cobalt initiates the 3 minute safety stop routine as I reach about 19 feet to end the dive. Perfect.
On dives two and three (when there is a third dive), my Cobalt does not initiate the 3 minute safety stop routine as I end my dives – it just continues to operate in the normal diving mode all the way through my surfacing. The OC1 on my wrist initiates it’s own 3 minute safety stop routine without fault, and I’ve followed that with no issue.
This pattern repeated itself each day whilst diving this past week and last month.
My question is, is there a setting on the Cobalt that I need to change so that it will initiate the 3 minute safety stop routine on each incremental dive on any given day?
Let me know.
Thanks !
John
Can you give some more information as to the dive profiles, and firmware version of the Cobalt?
Dives shallower than 40' won't necessarily trigger a safety stop, it's not just a mechanical process on every ascent, as it is on some dive computers. We use an algorithm for determining the need for a safety stop- for divers who are bouncing around in the 39' to 15' zone, we don't want to be constantly generating safety stop alerts. And when your dive is that shallow, the safety stop is a non issue as far as actual safety is concerned. In effect, it would just make your dive longer.
If your subsequent dives were deeper than 40' and didn't generate a safety stop, that would be something we would want to look at further.
Ron
I understand the issue with the two minute surface interval, particularly for instructors. There is a reason for it though, it's not arbitrary. The interval between dives is defined by the algorithm, and by extension, the physics of bubble formation. After you have been at the surface for two minutes, the algorithm will treat any re-descent as a new dive, which will have repetitive dive factors added, and have shortened no-stop times. The time at zero depth with quick re-descent is an additional risk factor for DCS, as there is time for seeds to expand,but not time for re-absorbtion or off gassing. Since the algorithm treats this as a new dive, we mirror that in the display.Hi RonR,
I got my Cobalt back in March and I love it. Awesome computer. ....<snip> Would it not be beneficial to be able to increase the amount of time before the computer starts a new dive? For some people 2 minutes is just fine, however I'm pretty sure that 2 minutes is just too short of a time for other people as well. On my old Aeris Atmos AI, it didn't start a new dive until after a 10 minute surface interval. Is there a possibility to be able to change that setting in a future firmware update? I....<snip>
The Cobalt's system is a custom one- for actually some very good reasons. You can change either the entire hose, or just the end part that is the female QD connector- it will thread onto any standard HP hose.I have a question that I probably should know the answer to already, but I don't...Is the quick release mechanism for the Cobalt proprietary, or will it work with other air integrated computers that also have a quick release mechanism? I'm going to lend my daughter my reg, and she has the Oceanic ProPlus 2.1 with quick release, while I have a Cobalt. Do I need to change the hose, or can she just use what is there?
Can you give some more information as to the dive profiles, and firmware version of the Cobalt?
Dives shallower than 40' won't necessarily trigger a safety stop, it's not just a mechanical process on every ascent, as it is on some dive computers. We use an algorithm for determining the need for a safety stop- for divers who are bouncing around in the 39' to 15' zone, we don't want to be constantly generating safety stop alerts. And when your dive is that shallow, the safety stop is a non issue as far as actual safety is concerned. In effect, it would just make your dive longer.
If your subsequent dives were deeper than 40' and didn't generate a safety stop, that would be something we would want to look at further.
Ron
Hey Ron:
Ok, here's the information you had asked for. Firmware version on my Cobalt: v.1.41/2.
....
John