Deep Dives 300ft to whatever

[AquaTec]

Anybody out there doing any technical deep diving.
By deep I mean 300 feet or deeper.

If so it would be interesting to chat and discuss procedures, gear, techniques, etc.

I do quite a bit of diving below 300 feet and will be doing a 404 this weekend.

if there is anybody here doing such dive let me know and lets see where the conversation takes us

[MikeFerrara]

All my stuff so far is above 200. You might want to send a note to Mike Barnett (auemike) of the AUE. They do some stuff at those depths I think. Certainly some on his list do, Richard Pyle for one. If you are using V-planner they would be interested in your dives over on the V-planner list. I would enjoy reading some tech info on your dives but as I said couldn't participate.

I have read that some of the models seem less reliable beyond 300. Richard Pyle reported seeing a greater DCS rate at those depths. Have you ar any in yourr group had similar experiences.

[WreckWriter]

my dives are to between 2 and 300, haven't broken 300 yet on mix. Like mike F. said, the AUE guys do 300+ regularly.

Tom

[O-ring]

Christina Young (www.christinayoung.com)
JT Barker (www.capt-jt.com)

[GP]

edited

[WreckWriter]

now THAT was funny!

[Uncle Pug]

WreckWriter once bubbled...
now THAT was funny!
if it had been me posting about you... then that would have been funny... or you posting about me...

Fun that hurts isn't fun... we need to pick targets more carefully

[WreckWriter]

Uncle Pug once bubbled...

if it had been me posting about you... then that would have been funny... or you posting about me...

Fun that hurts isn't fun... we need to pick targets more carefully

Targets of opportunity are no good? OK, maybe you're right.

[Uncle Pug]

AquaTec once bubbled...
I do quite a bit of diving below 300 feet and will be doing a 404 this weekend.
Hey.... how ya doin?

I don't have anything to offer in the 300+ discussion.... but I do have a question... how long are you planning to stay at 404?

[AquaTec]

Pug - good to see you are still here keeping it all real


Actual bottom time at 404, this has not been totally finalized but it will be between 5 and 10m minutes.
It’s really all about deco time, and contingency gas

[Uncle Pug]

AquaTec once bubbled...
Pug - good to see you are still here keeping it all real

it will be between 5 and 10m minutes.

What's the primary objective?
And where is this going to be?

[AquaTec]

The Primary objective?

That is probably a question that will be hard to answer here on this board, and the answer may not be understood or popular.

The objective is to personaly challange myself.

diving to these depths is not something i recommend to anybody and that is not the entent here. the entent is to communicate with others who do the same dives.

deep diving is something i take seriously, and i move slowly through the water collum increasing my depth at a very slow pace over many dives.

well that ought to be enought to chew on for now

[Uncle Pug]

but in a different dimension... rather than increasing depth... I am working on increasing meaningful time at depth... ie accomplishing an object other than attaining the depth.

Before I would be looking at the depths you are talking about I would definitely have to have an objective worth the logistical effort.

A while back, here near where I live... at a dive site that we do quite often... a fellow died on a 300' dive... there were many factors involved... not the least of which was no support team. Compounding the tragedy was the sense that the dive itself was meaningless... no real objective other than to bounce down to 300'. You know the old saying, "There is nothing down there worth dying for." .... well in this case that was so literally true that it is painful.... nothing but mud.

This is not a judgement on what you are doing... just an observation... and I really don't want to hear of your demise... I really don't.

As you say, I am still here.... keeping it real.
And I am still your friend.

[AquaTec]

fair enough Uncle Pug.

I was only discussing one aspect of the diving i enjoy.
I was rescently in Chuuk doing 220 foot dives with bottom time of 60 minutes. i personaly feel the main reason for excelerated decompression is to extend our bottom times shallow or deep.

I recently purchased a reabreather just so i coulod extend my dive times on shallow dives.

diving i love is deep, wreck, and caves. all other types of diving is fun but the above is my passion..

I was discussing only one small part of the diving i enjoy.

[Uncle Pug]

AquaTec once bubbled...
I recently purchased a reabreather just so i coulod extend my dive times on shallow dives.
..or two and I'll let you go:
What breather did you get... and will you be doing deep dives with it?

[AquaTec]

PUG
i quite enjoy a good conversation with you!!

I Purchased an Insperation

I will start with shallow dives. I have done some course work etc. as much as I can without acualy diving it.

so far what i have learned is that its like a skier learning to snowbaord. same enviroment two different things entirely.

I will move slowly, I have sat through the Trimix classroom course and I have several friends doing dives as deep as 525' and deeper.

so I am hoping to learn from the best, and progress slowly.

[Ber Rabbit]

A co-worker asked me how deep a person can dive without a special suit before the pressure crushes them. He had been discussing this with another co-worker and thought it was probably 300 feet or so. I told him that wasn't correct but I have no experience to address the question.

CAN you crush a person underwater? Liquid doesn't compress and we are mostly liquid, that much I do understand. Pressure can kill but at what depth? I'd like to give the guy an answer if possible. Thanks for letting me butt in!
Ber :bunny:

[Soggy]

Ber Rabbit once bubbled...
A co-worker asked me how deep a person can dive without a special suit before the pressure crushes them.

The world deep diving record was set last year by John Bennett. He, in a drysuit, went to 1011 feet with something like 9 hours of decompression. At the bottom, because of the fact that there was over 31 ATM of pressure on him, he would have been going through an AL 80 in around 4 minutes.

The only way we could crush is if the air pressure on the inside was less than the water pressure on the outside. This is why regulators supply air at ambient pressure, not 1 atm. So, crushing is really not the issue...it is a function of our bodies ability to deal with the gas in our system under high pressure and also a technological issue -- making regulators that work that deep. Submarines can crush because the inside of the ship is at approximately 1 atmosphere of pressure. That is also why they do not need decompression time.

[omar]

Bennet's record was for a open circuit bounce.

Saturation divers using rebreathers or hard hat gear have been diving much deeper than this for a long time.

omar

[Soggy]

omar once bubbled...
Saturation divers using rebreathers or hard hat gear have been diving much deeper than this for a long time.


Do you have any links? I'd be interested in reading about this.

[techdiver2us]

For extreme gases see: http://www.techdiver.ws/exotic_gases.shtml For saturation diving try: http://www.brooks.af.mil/web/hyper/Saturation_Diving_Overview.PDFAlso if you have broadband USN Manual at:http://www.coralspringsscuba.com/miscellaneous/usn_manual.htm

[omar]

try google

http://www.nedu.navsea.navy.mil/nedu_overview/page3.htm

From:
http://www.navydiver.org/history/default.html
1968 A record-breaking excursion dive to 1025 feet was made from a saturation depth of 825 feet at NEDU.
1972 The DDS MK-2 MOD 0 sets the in-water record of 1,010 fsw
1975 Divers using the MK 1 Deep Dive System descended to 1,148 fsw.

omar

[Ber Rabbit]

I thought depth would be limited more by physiological factors than by pressure but really wasn't going to answer a question like that for fear I was wrong and he'd take what I said as gospel since he doesn't dive and I do. YIKES! I don't do tech diving so I didn't dare venture into the equipment problem possibilities realm.

Thanks for the info, I'll pass that along and put it into my notes for future reference!
Ber :bunny:

[Uncle Pug]

AquaTec once bubbled...
I do quite a bit of diving below 300 feet and will be doing a 404 this weekend.
Give us a report.

Location
Depth
Duration
Deco
Conditions
bottom
Surface support
Team
Anything else you can think of.

[AquaTec]

PUG
had a little surgery right next to my eye so diving was out this weekend.

we have set up our dive for next weekend, probably at Whyte Cliff, unless we can score a boat.

I will keep you posted

[Uncle Pug]

AquaTec once bubbled...
probably at Whyte Cliff, unless we can score a boat.

I will keep you posted
Is that the one with the long hike down to the water?


Yes, please do.

[AquaTec]

No Pug
it is the one by Horseshoe Bay, just north of Vancouver

It looks like we might be doing our dive in Nanaimo after all off a boat, which is always nicer

[sig]

Thought you might be interested in this site www.diverssupport.com/sstahoe.htm

I hope through training and experience I can reach this level of diving someday. My current max is 150ft in the same lake. As much as I would like to be able to do this now I am in no hurry to do it with out the proper preparation.

[diverberr]

AquaTec once bubbled...
Anybody out there doing any technical deep diving.
By deep I mean 300 feet or deeper.

If so it would be interesting to chat and discuss procedures, gear, techniques, etc.

I do quite a bit of diving below 300 feet and will be doing a 404 this weekend.

if there is anybody here doing such dive let me know and lets see where the conversation takes us


Aquatec,

How did the 404 go? How long was your deco, and what did you end up pulling for bottom time?

I haven't dine any as deep as that yet. I'm currently diving in the 200 - 250 fsw range. We're doing a 250' next week.

Had an excellent dive yesterday to 200'.

Another wreck we're planning on doing in the near future is in 330', so these others are workups to that.

Be careful mate. See you on the bottom,
Diverberr.

[Canuck Diver]

Yes, there is John Bennett who did the 1000ft bounce dive in preparation for an upcoming wreck dive to 700ft on open circuit in the Phillipines.

...there are also Dr. Simon Mitchell and Trevor Jackson who did a 575ft wreck dive on rebreathers out of Brisbane, Australia.

I saw all of these guys speak at OzTek3 in Sydney and they are quite a good couple of fellows. Very open minded, no ego, just love diving and pushing the limits safely.

[AquaTec]

diverberr once bubbled...

Aquatec,

How did the 404 go? How long was your deco, and what did you end up pulling for bottom time?

I haven't dine any as deep as that yet. I'm currently diving in the 200 - 250 fsw range. We're doing a 250' next week.

Had an excellent dive yesterday to 200'.

Another wreck we're planning on doing in the near future is in 330', so these others are workups to that.

Be careful mate. See you on the bottom,
Diverberr.

Diverberr.
The 404 went very well, I will pull out my log and provide a detailed report under tek reports at a later date.
I too like to do my deep diving as warm ups to deep wrecks, if you have a comfort level at a certain depth then you remove that stress when you do wrecks at a shallower depth. plus i like it.

I just had a good friend of mine move to Novia Scotia, she is one of the best divers I have ever dove with [and shes hot] she would probably be interested in the wreck at 330, etc.

[diverberr]

AquaTec once bubbled...


Diverberr.
The 404 went very well, I will pull out my log and provide a detailed report under tek reports at a later date.
I too like to do my deep diving as warm ups to deep wrecks, if you have a comfort level at a certain depth then you remove that stress when you do wrecks at a shallower depth. plus i like it.

I just had a good friend of mine move to Novia Scotia, she is one of the best divers I have ever dove with [and shes hot] she would probably be interested in the wreck at 330, etc.

Cool. We normally use Skipper Dave's Charters. Dave is a good friend and a great guy. A very knowledgeable captain. You can give your friend his e-mail if she's interested. It's

captainandcrew@hfx.eastlink.ca

or she can reach me at:

diverberr@hotmail.com

We'd be happy to have another good tech diver as a regular on the charters. See you on the bottom,

Al.