DIR and SPG

[headhunter]

Is this what e/o else is doing?

I also bring the gauge over my shoulder.

Christian

 

[Rainer]

Yes. Based on primacy, this is 'the way' to do it, since it becomes necessary once you start adding a couple 40s or 80s on your left side.

Thanks! In that case, it's probably long enough. Just need to keep practicing clipping and unclipping.

 

[DIR-Atlanta]

Yes. Based on primacy, this is 'the way' to do it, since it becomes necessary once you start adding a couple 40s or 80s on your left side.

Here's a follow-up suggestion that may be helpful. When you unclip the SPG, bring it over your shoulder with a "windmill" type of a motion - keep your left arm and elbow relatively straight, rotate your left hand back, and then bring the SPG over your shoulder from behind. As Soggy mentioned, this is basically what you will have to do anyway when you start carrying deco bottles, so this will help you get you started with that all-important muscle memory.

 

[Meng_Tze]

Yes but I disagree with both the receiver and initial donor needing to know. The initial donor needs to know. The receiver doesn't. After donating the donor needs to do a bit of gas monitoring to make sure that consumption is not going faster than planned for and if it is then he makes the call for the switch. Since it's not up to the receiver to agree or disagree with the call he really has no reason to know. On longer exits a switch at the half way point should just be a given.

Of course it's probably a nice thing to let the receiver know gas status but it is not necessary.



I agree that an initial gas reading is needed, but I was trying to stay within the context of the thread asking about continous monitoring of an SPG by mounting it over the shoulder.

I thought that the 'show the spg and give the okay' step was taken out of this sequence?. I do recall a a change in that, not sure if it was last year. I could be wrong. While receiver collects themselves, moves in position and starts to move off to finish the dive, the donor quickly looks at spg to verify. Eliminating this step cuts some time, but most of all makes the whole sequence smoother. Especially in caves (more in narrow passages), where waiting, face to face to see donor spg, and then turning to exit could cost valuable time, gas etc.

But as nadwindy mentions, there is no need for receiver to see spg. It is the donor who manages the gas. Also, given that receiver has had an OOG situation, showing the spg and making him/her MORE aware of pending gas depletion (after having just experienced one) can potentially add stress and increased breathing.

 

[dumpsterDiver]

Can someone explain why it is important to keep the primary SPG hose straight in order to avoid excsss stress on the hose and swage, but then they say that you need to bend the hell out of a 6-inch hp hose for the stage bottle (i.e., tie wrapping it into a "U")? Never could figure this out on my own.

 

[nadwidny]

I thought that the 'show the spg and give the okay' step was taken out of this sequence?.

GUE has taken it out. I don't know if Andrew has or not.

 

[Jasonmh]

Can someone explain why it is important to keep the primary SPG hose straight in order to avoid excsss stress on the hose and swage, but then they say that you need to bend the hell out of a 6-inch hp hose for the stage bottle (i.e., tie wrapping it into a "U")? Never could figure this out on my own.

It's because the 6" hose is never moved while under pressure, and the bend does not put pressure at the swage like it can when you are moving the HP hose that is connected to the SPG

 

[dumpsterDiver]

It's because the 6" hose is never moved while under pressure, and the bend does not put pressure at the swage like it can when you are moving the HP hose that is connected to the SPG

Thanks for the answer, but I still find it hard to believe. Clearly the U-bend concentrates stress as the swage on a 6 inch hose?

 

[onfloat]

GUE has taken it out. I don't know if Andrew has or not.

Andrew still teaches it. Says it gives the team a chance to slow down and think before continuing.

As for hose length. When I first set up my rig(Apeks DST) I used a 22 inch hp hose and because I'm nickel rocket I did not go back for a longer hose. As a result I did learn to use it, cliping and uncliping. I always bring it over my shoulder. Now I don't see the need for anything longer.

Doing the mental thing and guessing my remaining gas, I would check my spg every 5 min. Now it's such a habit that I do it with out much of a thought.

 

[Kevrumbo]

GUE has taken it out. I don't know if Andrew has or not.

Yes but I disagree with both the receiver and initial donor needing to know. The initial donor needs to know. The receiver doesn't. After donating the donor needs to do a bit of gas monitoring to make sure that consumption is not going faster than planned for and if it is then he makes the call for the switch. Since it's not up to the receiver to agree or disagree with the call he really has no reason to know. On longer exits a switch at the half way point should just be a given.

Of course it's probably a nice thing to let the receiver know gas status but it is not necessary <snip>

I thought that the 'show the spg and give the okay' step was taken out of this sequence?. I do recall a a change in that, not sure if it was last year. I could be wrong. While receiver collects themselves, moves in position and starts to move off to finish the dive, the donor quickly looks at spg to verify. Eliminating this step cuts some time, but most of all makes the whole sequence smoother. Especially in caves (more in narrow passages), where waiting, face to face to see donor spg, and then turning to exit could cost valuable time, gas etc.

But as nadwindy mentions, there is no need for receiver to see spg. It is the donor who manages the gas. Also, given that receiver has had an OOG situation, showing the spg and making him/her MORE aware of pending gas depletion (after having just experienced one) can potentially add stress and increased breathing.

Sorry guys (and GUE) but I disagree . . .
On a 3-man Team, Wreck Night Dive, single-file through a restriction, gas-sharing, lights-out egress Drill with the OOG Diver sandwiched between --that OOG Diver has got to know, or at least have an idea how much gas his initial donor has left to share.

If the time comes to switch donors, the receiver sandwiched in between has got to stay close to the lead diver ahead, and communicate that a switch to that lead diver's long hose is imminent (in this instance probably by ripping the regulator from his mouth . . .:11: )

And yes, Andrew Georgitsis continues to teach "showing the SPG" on all Gas Sharing Drills. . .