Checklist for JJ-CCR
- Thread starter Terp
- Start date
Ahh I maybe have to clarify, sorry was a bit fast there was. This list is before diving and is not the package list of the rb, I have another list for that
bazSXD
Member
Guys we teach a five step check list
1 ... Physical ... is it all there ??? Check hoses, scrubber cannister, o-rings etc.
2 ... High Pressure ... check gas - content, volume, SPG's etc.
3 ... Low pressure ... BOV, ADV, injectors, wing, dumps etc.
4 ... Electronic's ... Cal the unit, check solenoid, HUD etc.
5 ... Neg and Pos tests then leave over night and check the Pos in the morning
Just a basic five point check that you can add to as your unit develops.
regards Baz
1 ... Physical ... is it all there ??? Check hoses, scrubber cannister, o-rings etc.
2 ... High Pressure ... check gas - content, volume, SPG's etc.
3 ... Low pressure ... BOV, ADV, injectors, wing, dumps etc.
4 ... Electronic's ... Cal the unit, check solenoid, HUD etc.
5 ... Neg and Pos tests then leave over night and check the Pos in the morning
Just a basic five point check that you can add to as your unit develops.
regards Baz
Ouch! seems a tad dodgy, what did they do then? i will put that into my ppo2 check
Ahh yes, that makes good sense! im going to switch that around.
bazSXD
Member
garethingham
New Member
GUE's latest quest magazine has a JJ specific checklist article in it. Not my IP so not going to publish it here. Get a copy of the magazine if you want it. Would also note that unless you have done their training you will be missing much of the context.
The article is fairly detailed in its reasoning for each item.
Sent from my iPhone using Tapatalk
The article is fairly detailed in its reasoning for each item.
Sent from my iPhone using Tapatalk
René Kofoed
Member
What's your opinion of the opening the O2, I'm not crazy about only open 3 halves, when we talk OC we always open the valve all the way up?
René
René
I'm not sure how smart, openning it fully, vs 3 halves is. But i think this is a somewhat grey zone compared to OC, since there is both pro's and con's on both. After more hours i may be smarter.
what i know now: 3 halves can save the Oxygen gas if a hose blows up (this should not happen, and how often do we see it?), can be confusing if not sure if its fully open or closed.
Im actually not sure what is smartest, i just do as i was taught now, maybe something smart pops up and tells me otherwise?
My general idea is to
1. Get a secondary test of MAV+ADV and the pressure gauges, to ensure that the system is open, just like a padi course teaches
2. Make the pressure test in the start, because a boatride is perfect for this.
3. Incorporate what i was looking for in my prebreathe
4. Small flapper valve test
5. Remove the last point of checking my valves for being open
I like this sequence, what do you guys think? I will go and talk with my instructor before use
René Kofoed
Member
If you have a hose blow up you go bailout, saveing O2 don't make any sense.
René
René
garethingham
New Member
I am with you Rene. If 02 reg fails so what. If it really gets to a point that it forces you off the loop then bail out and go home. If you are doing a dive in which you cannot carry complete bailout then either don't do the dive or carry a spare 02.
I am for valves full open so you are 100 percent sure of their position. This mindset of "save 02 at all costs" makes me think siege or alp insist mentality for the people that wrote the course notes. If 02 spikes deep simply bail off the loop, shut 02, flush then figure out what you want to do next. Could be valve feathering, swapping 02 supply or staying on bailout.
I really don't see it as the issue they do.
Sent from my iPhone using Tapatalk
Offtopic, but anyway.
Like Terp, I do as I was taught. 3 half turns, vs fully open (minus quarter turn) on OC.
I rationalised it this way:
On OC, if closing a valve is required, there's some time. Not much at all, this needs good practice, but there's loads of gas and the dive plan allows for a lot of wastage. In that time, there's usually not all that much to do to get back to a stable situation. E.g. if it's a reg, turn off, possibly switch, a feed, disconnect, sort out buoyancy, that sort of thing. Also fully open makes it easy to check the position is correct, and that's a necessity because if it's not that's potentially a very serious situation.
On CC, on the other hand, there's less time, and there's more things to do. If the solenoid fails open, bailout, turn off, fix buoyancy, and where the f*** is the wreck and everybody else
Shaving a few seconds helps. It does make it _slightly_ more difficult to check it's open right, but on the other hand, there's more time before that becomes a problem, and even half open is probably enough anyway.
Not saying this is correct, mind, just my thoughts.
Cheers,
Matthieu
Like Terp, I do as I was taught. 3 half turns, vs fully open (minus quarter turn) on OC.
I rationalised it this way:
On OC, if closing a valve is required, there's some time. Not much at all, this needs good practice, but there's loads of gas and the dive plan allows for a lot of wastage. In that time, there's usually not all that much to do to get back to a stable situation. E.g. if it's a reg, turn off, possibly switch, a feed, disconnect, sort out buoyancy, that sort of thing. Also fully open makes it easy to check the position is correct, and that's a necessity because if it's not that's potentially a very serious situation.
On CC, on the other hand, there's less time, and there's more things to do. If the solenoid fails open, bailout, turn off, fix buoyancy, and where the f*** is the wreck and everybody else
Shaving a few seconds helps. It does make it _slightly_ more difficult to check it's open right, but on the other hand, there's more time before that becomes a problem, and even half open is probably enough anyway.Not saying this is correct, mind, just my thoughts.
Cheers,
Matthieu
René Kofoed
Member
The reason I prefer the valve must be fully open, are minimizing rolloff at cavediving. There are some accidents where O2 is not open, why not make that risk less.
René
René