Diving Depths

[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 .

[Eddie]

Originally Posted by headquarters

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 .

Actually, you and I were both wrong. It's Pascal Bernabe now with a record of 330 meters.

"Bernabe broke the record in Corsica on open circuit scuba, with a descent time of less than ten minutes and a total time of 529 minutes for decompression.

The world record dive was the 41-year-old's fifth attempt at breaking the open circuit deep diving record, which he spent three years preparing for. Dive manufacturer Ralf Tech sponsored the event, which involved a dive support team of thirty team members and 12 support divers.

The experienced deep diver completed the dive on trimix, carrying a total of seven cylinders. In addition, 20 cylinders of various gas blends were also placed on three decompression lines."

Note that no diving bell was needed, no decompression chamber after the event, nothing special except for the 27 cylinders and 12 support divers, which are the surface support station equivalents from my original deep diving post above.

[jester]

So, yes your character can dive deep and hide out at depth as long as he is willing to sit out the decompression time and of course has the tanks staged.

OR, he can skip the entire step, if he has a boat waiting on the surface and he jumps right into a decompression chamber as soon as he hits the surface. That could reduce the need for staged gear and speed up the entire operation rather than him waiting underwater and holding up the mission.

And now for ways to bring harm to your players,


Well, Claustaphobia! either underwater, in the mask or inside the decompression chamber which leads to panic.

Gear malfunction: This can be anything from a leaking mask, to a bad gauge that tells him he is deeper or shallower than he is, a bad chronometer or dive watch, or a bad tank gauge telling him he is out of air when he isn't or has air when he hasn't.

Lost fin- a pain in the ass.

Lost or cracked mask

Lost weightbelt-

shifting gear or weightbelt

Can't get the right bouyancy so he is always fighting a bit to keep from sinking or from floating

Lost flashlight, knife or other small piece of gear

Broken zipper on wet suite, or worse a dry suite.

Ear Squeeze <where the pressure on the inner ear does not equalize> these are very painful

Ruptured eardrum, even more painful

diving with a sinus or ear or similiar condition- pain and misery

Pulled muscle- always get them.

Cut on coral, line or gear

Tangled in coral or line or gear straps

Faulty regulator- this is your airsupply

Faulty O ring on the tank, which makes it leak.

Valve on your tank is not turned on, or get bumped and turned off.

Wrong WetSuite for the conditions or time underwater which can be uncomforatable to deadly,

Bad air or gas. This happens even today. This can make one ill or dead.

Oxygen poisoning, where it gets toxic

Nitrogen Narcosis- or divers high, where the nitrogen levels are altered and you get drugged effect, this can be anywhere from just feeling good to wanting to swim to the seafloor and full on halucinations,

The Bends; you come up to fast nitrogen bubbles in your system increase and it can cause headaches, paralysis that can be permiment, blood vessels rupture, even a brain embalism which gives you the effects of a stroke or even death.

Ruptured lung: going up to fast without exhauling which causes lungs to burst. <Do not hold your breath when you surface!!!!>

Rupture Ear Drums, again pressure injury.

Other equipment failures, a malfunction bouyancy compensator after a dive not the time to fight to stay on the surface and in position after an exahusting dive.

Firegrass! I hate you guys in OZ for importing your seaweeds here! Its in my marina now and I got some last time i dove to work on my boat, stings like a mo fo!

Jelly Fish these are more common that sharks

Sharks sure

Agressive sea animals like sea lions, or seals or just curious ones who will get in your way or mess with your gear.

Dolphines you see a large gray fish shaped thing underwater and it gives a fear factor.

EELS these are more dangerous and common than sharks

Octopus and Squid, some can be agressive

Coral, it will shred you nicely

Panic

Getting Lost

Waves and Surf these will mess you up.

Boats, they can hit you, or you can surface under them.

Tunnels and Wrecks, getting lost, trapped or falling items or what not that can fall on your or cut you.

Fishing line, fish nets and seaweed or kelp forests all a danger for getting tangled.

Submerged logs, pier pillings and other debris, in a tidal area these are dangerous.

Missing your boat, a navigation issue, but remember that movie Openwater?

Anyhow, those are some of the things off the top of my head.

Oh you can have the evil villian have trained seals, sea lions and dolphins not with lazers attatched to their heads, but that patrol the underwater area with cameras or even a form of handcuff or legcuff <they had them on mailcall or some such show> or just counter divers hunting your characrer.

I hope this in some small way helps make your characters lives all the shorter and a bit more misrable.

[General Pain]

Originally Posted by jester

So, yes your character can dive deep and hide out at depth as long as he is willing to sit out the decompression time and of course has the tanks staged.

OR, he can skip the entire step, if he has a boat waiting on the surface and he jumps right into a decompression chamber as soon as he hits the surface. That could reduce the need for staged gear and speed up the entire operation rather than him waiting underwater and holding up the mission.

And now for ways to bring harm to your players,


Well, Claustaphobia! either underwater, in the mask or inside the decompression chamber which leads to panic.

Gear malfunction: This can be anything from a leaking mask, to a bad gauge that tells him he is deeper or shallower than he is, a bad chronometer or dive watch, or a bad tank gauge telling him he is out of air when he isn't or has air when he hasn't.

Lost fin- a pain in the ass.

Lost or cracked mask

Lost weightbelt-

shifting gear or weightbelt

Can't get the right bouyancy so he is always fighting a bit to keep from sinking or from floating

Lost flashlight, knife or other small piece of gear

Broken zipper on wet suite, or worse a dry suite.

Ear Squeeze <where the pressure on the inner ear does not equalize> these are very painful

Ruptured eardrum, even more painful

diving with a sinus or ear or similiar condition- pain and misery

Pulled muscle- always get them.

Cut on coral, line or gear

Tangled in coral or line or gear straps

Faulty regulator- this is your airsupply

Faulty O ring on the tank, which makes it leak.

Valve on your tank is not turned on, or get bumped and turned off.

Wrong WetSuite for the conditions or time underwater which can be uncomforatable to deadly,

Bad air or gas. This happens even today. This can make one ill or dead.

Oxygen poisoning, where it gets toxic

Nitrogen Narcosis- or divers high, where the nitrogen levels are altered and you get drugged effect, this can be anywhere from just feeling good to wanting to swim to the seafloor and full on halucinations,

The Bends; you come up to fast nitrogen bubbles in your system increase and it can cause headaches, paralysis that can be permiment, blood vessels rupture, even a brain embalism which gives you the effects of a stroke or even death.

Ruptured lung: going up to fast without exhauling which causes lungs to burst. <Do not hold your breath when you surface!!!!>

Rupture Ear Drums, again pressure injury.

Other equipment failures, a malfunction bouyancy compensator after a dive not the time to fight to stay on the surface and in position after an exahusting dive.

Firegrass! I hate you guys in OZ for importing your seaweeds here! Its in my marina now and I got some last time i dove to work on my boat, stings like a mo fo!

Jelly Fish these are more common that sharks

Sharks sure

Agressive sea animals like sea lions, or seals or just curious ones who will get in your way or mess with your gear.

Dolphines you see a large gray fish shaped thing underwater and it gives a fear factor.

EELS these are more dangerous and common than sharks

Octopus and Squid, some can be agressive

Coral, it will shred you nicely

Panic

Getting Lost

Waves and Surf these will mess you up.

Boats, they can hit you, or you can surface under them.

Tunnels and Wrecks, getting lost, trapped or falling items or what not that can fall on your or cut you.

Fishing line, fish nets and seaweed or kelp forests all a danger for getting tangled.

Submerged logs, pier pillings and other debris, in a tidal area these are dangerous.

Missing your boat, a navigation issue, but remember that movie Openwater?

Anyhow, those are some of the things off the top of my head.

Oh you can have the evil villian have trained seals, sea lions and dolphins not with lazers attatched to their heads, but that patrol the underwater area with cameras or even a form of handcuff or legcuff <they had them on mailcall or some such show> or just counter divers hunting your characrer.

I hope this in some small way helps make your characters lives all the shorter and a bit more misrable.

priceless list here,,,,,,,thanx alot

[Targan]

Originally Posted by Eddie

Note that no diving bell was needed, no decompression chamber after the event, nothing special except for the 27 cylinders and 12 support divers, which are the surface support station equivalents from my original deep diving post above.

I see your point but this sounds like a guy whose entire life probably revolves around diving and it took three years of preparation for that one attempt. For a Merc:2000 mission you're probably going to have personnel who have a slightly broader skills set at the expense of extreme niche specialisation. And your average Merc:2000 mission is more likely to have a prep time of three weeks than three years. On the other hand a sufficiently well connected, cashed up Merc team could certainly seek to recruit elite standard divers and support personnel.

[Targan]

I just occurred to me, if you bought/hired/stole a small rescue or research submarine (the kind with omni directional impeller thrusters, remote manipulator arms, high end sonar/magnetometer/inertial guidance/multispectrum camera s/ULF radio electronic gear, docking cuffs and air locks) you might be able to remove the requirement for individual deep diving. Or make things much safer and easier for the divers if they were still required.

Imagine how satisfying it would be to raid a NUMA facility, execute that hyper-macho narcisist Dirk Pitt when he refuses to surrender control of his ship and steam off into the open ocean under cover of darkness in the finest Horn of Africa traditions of piracy.

[headquarters]

Originally Posted by Targan

I see your point but this sounds like a guy whose entire life probably revolves around diving and it took three years of preparation for that one attempt. For a Merc:2000 mission you're probably going to have personnel who have a slightly broader skills set at the expense of extreme niche specialisation. And your average Merc:2000 mission is more likely to have a prep time of three weeks than three years. On the other hand a sufficiently well connected, cashed up Merc team could certainly seek to recruit elite standard divers and support personnel.

it will be your usual ramshackle operation that ends in a fervent display of ungallant gunplay before we speed of -probably leaving a team member down there to decompress with whats left in his tanks before he has to resurface to where the enemy as anchored ...

no PCs are "tecnical divers" as far as I know -2-4 points I guess .Should make the average rolls quite interesting at 150 meters depths..

hehe..

better bring a back up PC

[Eddie]

Originally Posted by Targan

I see your point but this sounds like a guy whose entire life probably revolves around diving and it took three years of preparation for that one attempt. For a Merc:2000 mission you're probably going to have personnel who have a slightly broader skills set at the expense of extreme niche specialisation. And your average Merc:2000 mission is more likely to have a prep time of three weeks than three years. On the other hand a sufficiently well connected, cashed up Merc team could certainly seek to recruit elite standard divers and support personnel.

True, but the need for decompression chambers and special equipment and skills was negated by the 529 minute ascent. That achieved the same effect of coming out, going to a chamber, and sitting there for 529 minutes. That was the point that I wanted to make with that paragraph, that there are ways of doing the same thing without needing massive pieces of equipment like a DECO chamber.

Will players want to do that (or logistically be able to)? Not likely without handwaving of passage of time from the GM. Maybe a good time for a diving skill check and a panic check in whatever respective system you use for your game, then move on to the next scene.

Another thing, physical preparation for diving doesn't require a lot, especially ascending and descending along reference lines. Running is sufficient for most diving as that will affect your breathing and your endurance. Flutter kicks are used to improve your kick cycles. Nothing else is really needed.