Decompression on Explorer
- Thread starter Pat413
- Start date
larry_berlin
New Member
Hi,
Manual for download, look here: http://www.hollis.com/media/wysiwyg/HO/manuals/Explorer_Manual_12-4102-r04_1-3-14.pdf
Read page 75 for more info regarding deco obligations.
best regards
Larry
Manual for download, look here: http://www.hollis.com/media/wysiwyg/HO/manuals/Explorer_Manual_12-4102-r04_1-3-14.pdf
Read page 75 for more info regarding deco obligations.
best regards
Larry
hroark2112
Bah humbug!
Youre breathing that nitrox-ish stuff...its got some oxygen...some nitrogen...other stuff...
On a serious note, deco could come into play on multiple dives in a day.
On a serious note, deco could come into play on multiple dives in a day.
Dinspiration
Member
Hello,
As soon as you need decompression the blue led starts flashing and the display shows "Deco Ascend to xx m" - "xx" is your next decompression stop. When you stay longer -- the decompression time and depth is automatically updated. The controller does not show any TTS or a list of your decompression stops - It shows just your next decompression stop. As long as you need decompression the blue led flashes and you see the deco message on your controller. When you download a dive and take a closer look into the log, you will notice that the controller handles your decompression like a normal dive computer - At least this is my personal thinking about it. If I remember it correctly the decompression is always based on air to got a very high safety factor. I would not be surprised when Hollis will in the future release an 40 meter decompression firmware for it. The hardware can handle it and the controller does already decompression calculation.....
As soon as you need decompression the blue led starts flashing and the display shows "Deco Ascend to xx m" - "xx" is your next decompression stop. When you stay longer -- the decompression time and depth is automatically updated. The controller does not show any TTS or a list of your decompression stops - It shows just your next decompression stop. As long as you need decompression the blue led flashes and you see the deco message on your controller. When you download a dive and take a closer look into the log, you will notice that the controller handles your decompression like a normal dive computer - At least this is my personal thinking about it. If I remember it correctly the decompression is always based on air to got a very high safety factor. I would not be surprised when Hollis will in the future release an 40 meter decompression firmware for it. The hardware can handle it and the controller does already decompression calculation.....
Mr fish
Active Member
air deco / safe , high safety factor . not so sure about that safety factor ,as i worked out it could knock out 23% nitrox-ish stuff. , when it wanted to . / dreging out the dive time , (23% thats from the profiles posted , )
i think its a fine how to do , dive nitrox and deco on air , seems all arse about tit , but hay ist a hole new world ,
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Please listen to fish, he is an expert, he is an authority on the Hollis explorer.
Tell us fish, tell us of your vast experience on the Explorer. Please tell us how this unit operates in the water and how you found it's features and functions while diving the unit.
Ok, if you want longer NDL's than OC and less weight to lug around,and are willing to stay above 140 ftthen the Explorer will be fine for a recreation RB. If you more than a couple minutes of deco and depths outside of recreation OW diving, then the Explorer is not the unit you will be happy with.I and a couple other insrtructors have done many things on the unit to push the edges of what it was designed for and I can say-If taught correctly, the diver can realize much more dive time (and near silent dives) than on open circuit, well past the NDL's of open circuit.
Tell us fish, tell us of your vast experience on the Explorer. Please tell us how this unit operates in the water and how you found it's features and functions while diving the unit.
Ok, if you want longer NDL's than OC and less weight to lug around,and are willing to stay above 140 ftthen the Explorer will be fine for a recreation RB. If you more than a couple minutes of deco and depths outside of recreation OW diving, then the Explorer is not the unit you will be happy with.I and a couple other insrtructors have done many things on the unit to push the edges of what it was designed for and I can say-If taught correctly, the diver can realize much more dive time (and near silent dives) than on open circuit, well past the NDL's of open circuit.
Mr fish
Active Member
no need to get all shitty ,
you dont need to be some internet expert to smell dead fish so tell me it cant dropp the ppo2 down to 23% / 24% .. do not try sell me dead fish m8 ,
may work in the us of a , but it wont in the uk , ps pushing the unit , well fook me , im sure you can but not with the cylinder that comes with the unit ,
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Jeppe
When In Doubt - Bail Out!
You only get the annoying alarm if you dive with the wrong battery. As you are doing deco dives, you should also be a certified deco diver and then you use the correct software in the MkVI :rotate:
I am more thinking in terms of, okay so you have a deco obligation on the Explorer, so you better bring some offboard deco gas, right? I mean, it is a 5 ltr tank 230 BAR? There is not endless amount of gas, and how do you plan a deco dive (or maybe I should say gas planning) with the explorer?
Do you plan according to runtime (2 hrs)?
If ever there was discussion around the whole "right tool for the job" now would be a good time
Pretty sure the Explorer is awesome on what it does, but likewise, it is not very impressive (and neither should it) with what it doesnt do.
oh, no I would never try to offend an expert such as you, with your vast experience on the explorer. So how many dives do you have on the unit?
by the way. 23%/24% are Fractions of O2 , not PO2's. It is truly sad that you have had a hard time with the 5L tank that comes with the unit. How many times have you tried?
what are you trying to push? Please tell us about the dives where it did not do what you want or even what it was supposed to do. Thanks for your immense help.
Mr fish
Active Member
tell you what smart arse you anxwer jeepe about ,
and ill post you a long list of divers that have had a hard time .on a 5l cylinder and bigger ,
thanks for the head,s up of fo2 and ppo2 , good of you , so if the fo2 is 32% and the diver is at 40m whats the ppo2 in the loop and what would the Injection Rate be to keep the ppo2 stable , and how long would that 5l cylinder last , and what size baill out would the diver need ,
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That would be a great question for your instructor, what was your instructor's name again? Or are you the expert that has all the answers? Which is it?
Please tell us how to do this dive, fish. I still need to learn quite a bit about the Explorer. When did you do your dives on the Explorer?? Were those dives like this one?
You only get the annoying alarm if you dive with the wrong battery. As you are doing deco dives, you should also be a certified deco diver and then you use the correct software in the MkVI :rotate:
I am more thinking in terms of, okay so you have a deco obligation on the Explorer, so you better bring some offboard deco gas, right? I mean, it is a 5 ltr tank 230 BAR? There is not endless amount of gas, and how do you plan a deco dive (or maybe I should say gas planning) with the explorer?
Do you plan according to runtime (2 hrs)?
If ever there was discussion around the whole "right tool for the job" now would be a good time
Pretty sure the Explorer is awesome on what it does, but likewise, it is not very impressive (and neither should it) with what it doesnt do.
Jeppe, you have the right idea, the Explorer is truly meant to be used up to -but not including- deco. The deco function is solely there as an indicaor of how much the diver has violated the dive plan, and that dive plan should not included deco. As far as Dive Planning, this is part of the course and as with any plan, you have a plan and you have an alternative plan if things go long or short. It is all part of the class.
As far as what it actually does do- the eSCR moniker is actually a perfect description. Instead of relying on some flow rate or orifice or the use of dil and 100% O2, it does what any scr should do and extends the single nitrox gas. The "e" part is what people don't get. There are some tricks and tips that I impart to my students and then we actually use them during dives. The funny thing is that I printed out some of the threads about people having problems getting the numbers they should get on the units, we go over how to do it correctly, then we actually do the dives and verify that the unit does what it is supposed to do.
The problem with people here is that they have such a skewed bias toward technical use of rebreathers that they can not achieve the proper perspective. I think it's like they can never go back to what it was like to make a choice that didn't involve tech diving or deco diving.
The Explorer is a Rec RB as it stands now. So when people discuss it -they need to do so in rec terms. There are things that can(and will) change, both from the manufacturer and end users. I have one that has been modified very heavily, but that is what I wanted to do with the extra one I had laying around. but it gets put away when I teach a class and we go over what is expected of the students by the manufacturer and training agency.
Pat413
Member
Thanks DIN, this was a very clear answer to my question. Too bad he doesn't show TTS, would be important to know with remaining gas.
Anyway I perfectly understood that the unit is not designed for such dives. But if I want to push it over the limits I would take separate computer (Shearwater) and enough bail out of course. That said makes no sense as for such dives I have other units... But you never know what can happen.
First off all, deeper than 18m you use a bail out tank. The size is uo to you. 40cuft or bigger. Second, so far its a rec unit but you can do dec diving. You just have to stay deep enough for a certain amount of time. You will not get punished by the unit like a Poseidon disco vibration etc, no, all you get is a yellow warning on the controller screen which you have to confirm and a blue/green warning on your hud. You can continue the dive and your decompression obligation is shown on your computer screen like in other comp, nothing else. minutes related to depth.
Its a eSCR its controlled by three O2 sensors. This means the -dive control point- (setpoint) is electroniclly controlled and maintained by the solenoid. But not to forget, always related to the actuall depth. You personally con adjust the ppO2 depending what you prefer, longer NDL or lower ppO2 for deeper diving. The ppO2 in the loop can have a range between around 25% up to around 35%. The unit itself is working with 32-40% of Nitrox.
The unit is perfect for what its made. Take it out of the box, charge the batteries, get into the water doing your course or go diving.
But as H2Ocaver already mentioned, so far its a rec unit and for that its a great little thing with all the features Hollis has implemented. go diving, enjoy and if you exeed the limits you will get information on your compscreen to control the dive.
@fish i dont know you but i can imagine that your question about depth, time, scrubber, airconsumption etc you can answer by yourself. But ok, the answer is: it depends on your airconsumption, watertemperature, depth etc. But i can tell you, you will have a lot of time underwater to spend.
Its a eSCR its controlled by three O2 sensors. This means the -dive control point- (setpoint) is electroniclly controlled and maintained by the solenoid. But not to forget, always related to the actuall depth. You personally con adjust the ppO2 depending what you prefer, longer NDL or lower ppO2 for deeper diving. The ppO2 in the loop can have a range between around 25% up to around 35%. The unit itself is working with 32-40% of Nitrox.
The unit is perfect for what its made. Take it out of the box, charge the batteries, get into the water doing your course or go diving.
But as H2Ocaver already mentioned, so far its a rec unit and for that its a great little thing with all the features Hollis has implemented. go diving, enjoy and if you exeed the limits you will get information on your compscreen to control the dive.
@fish i dont know you but i can imagine that your question about depth, time, scrubber, airconsumption etc you can answer by yourself. But ok, the answer is: it depends on your airconsumption, watertemperature, depth etc. But i can tell you, you will have a lot of time underwater to spend.
Hi Pat,
correct, but the TTS time shouldnt be a problem for you. calculate the couple of minutes including the stop time shown on the screen and thats it. we are not talking about a 150m tx dive.
The Explorer has anyway a feature implemented that if your are running low on gas, this again related to depth etc you will be informed to ascent. The safetymargine is calculated on the worst case of high gasconsumtion and baleout using the gas of the unit.
correct, but the TTS time shouldnt be a problem for you. calculate the couple of minutes including the stop time shown on the screen and thats it. we are not talking about a 150m tx dive.
The Explorer has anyway a feature implemented that if your are running low on gas, this again related to depth etc you will be informed to ascent. The safetymargine is calculated on the worst case of high gasconsumtion and baleout using the gas of the unit.