2 Side Mount AL40's and a Back Mount S100?

[Bowers]

This is how i got in to sidemount originally. I had my bp/w with a steel 72 and would sidemount 40’s. Then i started sidemounting 80’s instead of 40’s, then i bungeed my wing down instead of having the steel 72, then i finally got a sidemount bc and love it lol

 

[coldcanbefun]

https://www.divetable.info/workshop/USN_Rev6.pdf

As I said before, within NDL, i.e. so the time is dependent on the specifics of the dive. If NDL says 95 minutes then it would not be a two hour dive.

Thanks for the tip on Navionics, I've been looking around for information like this.

 

[coldcanbefun]

This is how i got in to sidemount originally. I had my bp/w with a steel 72 and would sidemount 40’s. Then i started sidemounting 80’s instead of 40’s, then i bungeed my wing down instead of having the steel 72, then i finally got a sidemount bc and love it lol

This is pretty much what my train of thought was. Thanks @Bowers.

 

[coldcanbefun]

@coldcanbefun

I think your mission is to entertain yourself with an equipment experiment more than it is to accomplish a serious surveying and mapping effort. I don't mean that phrase "entertain yourself" in a condescending way but simply in a frank way.

It’s evident you're dead set on doing something that a whole lot of other people (with more experience) are rejecting in favor of simpler, vetted methods. It seems you're set on learning the hard way rather than the easy way.

If you were introduced into a serious surveying effort with experienced divers and going through pre-dive planning, I think chances are much higher that you'd conclude you're just playing with dive equipment rather than really prototyping a more effective equipment configuration for extended BTs. The other survey divers would be getting on with things UW and topsides with data review while you're still focused on trying to define and refine your procedures.

If it were me, I'd be on a twinset to free up my hands for uninterrupted, organized and thorough data collection.

Whatever your mission really is, good luck with surveying your 15 sites this winter.

Let us know how things go.

@NothingClever your choice of words does sound a bit condescending but I'll take your word for it. I'm aware of what my mission is, and think I've communicated it well.

You are wrong that I am dead set on ignoring the advice here, as expressed in my previous post to @halocline.

I'm not going to respond to your comments on serious surveying, I feel it would be unproductive.

A twinset isn't an option for me this winter.

Thanks, I certainly will, actually probably not, I'm not sure I would want to resurrect this thread with updates.

 

[coldcanbefun]

Do you understand that what you are describing is three 2nd stages around your neck, with three hoses presumably coming from the right? When the 2nd stage on the left D ring is clipped, is the hose running on top of the necklace or underneath? If on top, it impedes access to the necklace 2nd stage. If underneath, the 2nd stage necklace impedes access to the 2nd stage on the left D ring.

Which hose do you don/doff first, because without establishing this and adhering to it, your hoses are very likely to get tangled with each other as you attempt to switch between them. Have you established a protocol for switching from the BM tank to one of the small tanks; i.e a routine as to whether you will always switch between the BM andd left tank or right tank? Because that also matters with regards to managing the hose routing. What if there’s an emergency and you need to switch quickly; do you unclip the other small tank from a D-ring or do you go directly to the necklace? If you go to the necklace, have you figured out how to keep the hose from the reg on the left chest D ring out of the way? What about air sharing, how will you manage that? (I realize you are intending this as a solo set up, but even so, it’s irresponsible to not have a plan fro assisting another diver) How about valve drills? Have you figured that one out, and how you would deal with a sudden leak? It will get very confusing, very fast. And these are just a few of the details.

There are good reasons why people take classes in technical diving for complex, multi tank set ups. Years of thought and course development have gone into training divers to successfully manage all the things that can go wrong. Think about it.

BTW, the size of the tanks has nothing to do with why your 40s are not sidemount tanks. They are not SM tanks because you are not using them as such. You don’t seem to understand this, which makes sense because as I said in an earlier post, we don’t know what we don’t know. Diving is not so much about the gear choice as it is about the techniques and protocols, tailored to specific environments and demands. Then the gear selection, and training to manage the inevitable task loading, follows to support what you need to do on the dive.

@halocline all good points on the hose routing, maybe for the 40's up the chest on the same side is better, i.e. left tank to left D ring, right tank to right D ring, excess hose in the tank bands? I'm still working this out.

As far as the protocols, I'm working that out as well, that was actually the point of adding the 2nd tank, to work all this out. We don't need to rehash the debate of whether or not that was a good idea, we've covered that ground.

I'm not against classes, I've taken many and will take more, just not this winter.

 

[gmerick]

This may be the dive profile you are looking for. This is with a two-tank sidemount setup.

Staying shallow, I'll even do 3 hours (two tank sidemount):

These were shore dives at Salt River and Butler Bay on St Croix. I have to wear extra thermal protection, and bring drinking water on these trips.

 

[NothingClever]

You are wrong that I am dead set on ignoring the advice here, as expressed in my previous post to @halocline.

@coldcanbefun

You're right, you did express second thoughts and I missed that. To be transparent, I stopped reading after the first sentence. Clearly, it would've been helpful if I had kept reading before responding.

I sincerely applaud your inclination to give matters more thought.

One thing you can be certain about, if you do take more advanced training, avoiding the complicated configuration you've described will avoid having to unlearn some unhelpful habits that you would develop if you were to proceed with the configuration.

In training phases, I have a phrase I like to use when things are mentally or physically tough - "Learning is winning."

I do sincerely hope you have a safe and enjoyable journey!

 

[coldcanbefun]

This may be the dive profile you are looking for. This is with a two-tank sidemount setup.
View attachment 874869

Staying shallow, I'll even do 3 hours (two tank sidemount):
View attachment 874870

These were shore dives at Salt River and Butler Bay on St Croix. I have to wear extra thermal protection, and bring drinking water on these trips.

Thanks @gmerick I'll post some of my own when I move this to the next stage.