Diving Depths

[headquarters]

Firstly - the gear needed to go down to svereal hundred meters depth 200-300) is more or less the standard looking diving gear - neoprene dry suit ,mask ,leadbelt,fins ,divecomputer, ventil system /respirator etc .-and tanks .

The quality of the gear should be outstanding at anything below 50ft imho or you are liable to do yourself an injury - but plenty of perople go down with older / cheaper stuff .(Thats not to say that older is poorer ! )

Its what is in the tanks that is the main issue as fas as I know ( got the open water advanced or whatsitsname).Regular compressed air can only be used to a depth of 42 meters (?) or the oxygen will drug you and you will take your mask off to kiss the pretty fishes before you sleep a in the gently rocking current at 70 meters depth .( Or so I have heard )

When you go down below a certain depth ( I guess its roughly 60 ft) you are on a clock .The longer you stay down ,the longer you need to stop at intervalls on your way up - hanging on to an anchor rope at say 20 meters for 15 min ,then at 10 m for 10 mins etc -these depths and times are variables .

The longer you stay down ,the longer you will have to wait before you can resurface .This is because nitrogene bubbles accumulate in the blodstream ,and have to dissipate before you resurface -the nitrogene bubbles expand the closer you get to the surface as the pressure decreases.I am told it can be hurtful and cause cardiac arrest if you get into an accident with this .

Decompression chambers are used for people who go up to fast , or for people that have been down so deep and so long that they cant very well decompress in the water .

I have PM ed you a link with various dive tables that can be downloaded .

For all you divers out there -I am aware that I only know the main principles and not the details anymore ..its been a while since my last dive .

[Targan]

Originally Posted by headquarters

Firstly - the gear needed to go down to svereal hundred meters depth...

I'm pretty sure you mean feet right?

[headquarters]

Originally Posted by Targan

I'm pretty sure you mean feet right?

I think I mean METERS - isnt the free dive record with nothing but a pair of trunks 140 meters ?

[Targan]

Originally Posted by headquarters

I think I mean METERS - isnt the free dive record with nothing but a pair of trunks 140 meters ?

Are we talking someone with a little bit of diving experience or a Navy clearance diver? If you are going down hundreds of meters you're probably going to need more than just standard dive gear - you're going to need a diving bell for decompression stops or maybe even a decompression chamber on the surface. If the diver isn't well experienced and well supported and he's going that deep I'd say there is a significant risk of death.

[headquarters]

Originally Posted by Targan

Are we talking someone with a little bit of diving experience or a Navy clearance diver? If you are going down hundreds of meters you're probably going to need more than just standard dive gear - you're going to need a diving bell for decompression stops or maybe even a decompression chamber on the surface. If the diver isn't well experienced and well supported and he's going that deep I'd say there is a significant risk of death.

But I think that Gen Pain was asking for what ind of general diving gear you need - as fas I know its just drysuit ,flasks/tanks,fins etc -not saying that it shouldnt be of a technical quality -just that it isnt some other kindf of hardshell suit say..

As for the decompression chamber etc I totally agree .

Also - it would be a professional diver - other sshould stay close to the surface .

[Fusilier]

Originally Posted by Targan

I'm pretty sure you mean feet right?

He probably should.

Most people can't dive deeper than 50 meters. After that it becomes a technical skill and usually requires special gases for mixing/blending. Do it wrong and you can guess what happens. In twilight 2000 I would guess making this possible (having the resources for acquiring the mixes such as helium) would be a challenge.

Only the most skilled/experienced have only really done around 150+ meters, and that requires top of the line gear and perfectly engineered trimix.

[General Pain]

http://www.impulseadventure.com/free...ld-record.html

[General Pain]

http://en.wikipedia.org/wiki/Herbert_Nitsch

[headquarters]

Originally Posted by General Pain

http://en.wikipedia.org/wiki/Herbert_Nitsch

this isnt relevant to our upcoming mission - this is only straight down and up again , no manouvering or work done at depths.

If the mission depth is more than 50 m I guess trimix in the tanks ,technical grade diving equipment and the use of a decompression chamber is the way to go .

But as you can see - there is no need for different TYPEs of suits etc ,just a soft suit and tanks made for technical dives .

[headquarters]

http://en.wikipedia.org/wiki/Technical_diving

Also check out Nuno Gomez , he holds the world record of 318 m using scuba gear - and a variety of gas mixes to achieve such depths .

thats app 1000 feet .

Also there is a big case up here about professional diver sueing the goverment foerwhat they went through after working at depths from 70 to over 200 meters in the 1980s and 1990s.

So -that is several hundred meters -and several hundred feet as well .

[headquarters]

Originally Posted by Fusilier

He probably should.

Most people can't dive deeper than 50 meters. After that it becomes a technical skill and usually requires special gases for mixing/blending. Do it wrong and you can guess what happens. In twilight 2000 I would guess making this possible (having the resources for acquiring the mixes such as helium) would be a challenge.

Only the most skilled/experienced have only really done around 150+ meters, and that requires top of the line gear and perfectly engineered trimix.

Well , as I said a couple of times already - its still in principle a soft neoprene suit ,fins ,mask etc like an amateur set for PADI style recreational diving , even if the tanks are filled with trimix or helium mix and the materials ,suit regulators and masks etc have to be of a "technical quality"

So -yes I meant meters .



with technical dive gear ( 42 m + ) and gas mix .re-read the posts guys

for recreational dives , no deeper than 42 meters as far I recall ,but thats with regular compressed air in the flasks .

The questions pertain to a merc 2000 campaign run by the general -so finding gear ,getting the gas mix etc will not be a huge problem .

[Targan]

Originally Posted by headquarters

The questions pertain to a merc 2000 campaign run by the general -so finding gear ,getting the gas mix etc will not be a huge problem .

Well that will teach me for not reading the first post in a thread more carefully. I understand now. My apologies.

[headquarters]

Originally Posted by Targan

Well that will teach me for not reading the first post in a thread more carefully. I understand now. My apologies.

your Australian - you are supposed to behave like that