A really noob question...

Alky · 06-16-07, 05:20 PM

How do you replenish the oxygen or is it important? I have the game set to easy because I don't know squat about subs. I tried running on the surface but nothing changed

spock1898 · 06-16-07, 05:42 PM

The CO2 meter should be empty most of the time, indicating a full supply of breathable air. Surfacing should take care of this. The longer you run at depth, the more carbon dioxide will build up, leading to bad things

. It does seem counterintuitive for 3 of your 4 meters to read near full almost all the time with one that should read near empty most of the time. Don't worry, if the CO2 meter is empty, you're fine. Just make sure you start heading toward the surface when it starts reading more than about 80%.

Alky · 06-16-07, 06:01 PM

Quote:

Originally Posted by spock1898

The CO2 meter should be empty most of the time, indicating a full supply of breathable air. Surfacing should take care of this.

Ahh, I think I was reading it backwards, the other 3 items had little red blocks filling the area, I thought that meant full and the oxygen indicator was empty so I panicked... lol, hey, I've only had the sim 2 days gimme a break :rotfl:
Good thing I have it in easy mode or I'd be looking for a whole new crew!

Thanx for the help Spock, much appreciated.

CaptainHaplo · 06-16-07, 08:40 PM

What Spock said - along with a Welcome Aboard!

spock1898 · 06-17-07, 04:13 PM

No prob Alky, though it would have been much more logical

to have an O2 meter instead of a CO2 meter. Has anyone else stopped to consider this? Historically, which did real subs have, or did they have both?

Sorry, I just couldn't resist a good Spock-ism.

Sailor Steve · 06-17-07, 04:15 PM

Quote:

Originally Posted by spock1898

No prob Alky, though it would have been much more logical

to have an O2 meter instead of a CO2 meter. Has anyone else stopped to consider this? Historically, which did real subs have, or did they have both?

I find your question fascinating. I'm sure the answer will be also.

Actually I would hope the devs did their research and the guage as portrayed is correct. Unfortunately I can't say for sure.

Alky · 06-17-07, 05:20 PM

Quote:

Actually I would hope the devs did their research and the guage as portrayed is correct. Unfortunately I can't say for sure.

Thanks guys, and thanks for the welcome

Race cars and fighter planes are my normal distraction, but I thought I should look into subs, I've always thought they were interesting and love watching sub movies

10,000+ posts... holy moly!!

Takeda Shingen · 06-17-07, 05:32 PM

Quote:

Originally Posted by Alky

10,000+ posts... holy moly!!

Don't be too impressed. Most of them were quotations of Abbot and Costello routines.

Major Johnson · 06-17-07, 06:56 PM

[quote=Takeda Shingen]

Quote:

Originally Posted by Alky

Quote:

10,000+ posts... holy moly!!

Don't be too impressed. Most of them were quotations of Abbot and Costello routines.

LOL!!!!:rotfl:
Gotta love a moderator with a sense of humor!!

Xelif · 06-17-07, 07:33 PM

As far as I know, they use a CO2 meter because that's what is most important. When you're underwater for great lengths of time, I believe the buildup of carbon dioxide becomes toxic more quickly than a lack of oxygen. Think of the spacecraft Apollo 13 and the movie about it - CO2 buildup was the problem, not a lack of oxygen.

I know that the human brain detects/signals the need to breathe by sensing rising blood acidity - this is caused by increased carbon dioxide dissolving into ah carbonic acid I believe in the blood. So our brains detect CO2 levels in the blood rather than oxygen levels

GTHammer · 06-17-07, 08:53 PM

Ok this might be a dumb questions/series of questions but...

How do they deal with the CO2? Do they use scrubbers like on space craft? If so then shouldn't they be able to just change the filters and with enough filters etc then shouldn't they be able to stay down as long as they have fresh Oxygen to add to the air?

Xelif · 06-17-07, 09:58 PM

I have no clue about the air systems on WW2 subs. I believe I have read about oxygen candles, and maybe even the use of lime to counteract acidic carbon dioxide in various forms... but I have no references! Whee. How useful. I also think the terms 'oxygen' and 'air' may be used interchangeably in some contexts, further confusing in my mind what exactly is going on - O2 added, CO2 removed, or both?

Perhaps the technology wasn't quite advanced enough by that point to allow full air rebreathers. I know that as a technology for divers, air rebreathers weren't available until some time after the war. By air rebreathers, I mean a technology that processes your exhaled air to remove the CO2 and add in O2, or a technology that strips that pesky carbon and returns O2 directly... It might have been a low priority in research back then.

Nuclear subs generate O2 by splitting water, as far as I know, but I don't know how they get rid of the CO2. Filters can be annoying as they have to be replaced, I know that much, and nuclear subs are legendary for submerged duration. Venting would be a simple option.

Powerthighs · 06-17-07, 10:32 PM

I believe the CO2 in nuclear subs is removed from the air through a chemial process.

Centred75 · 06-17-07, 10:56 PM

Other than the lime absorbant which was usually used only in emergencies (as it was pretty much one time use only, like your brita/pur water filters) submarines of that age just let the CO2 build up in the air (hense the CO2 meter). Subs were designed in such a manner as to allow them to operate submerged long enough that the batteries would run dry before the CO2 levels became dangerous. If situations prevented the sub from surfacing (say they had to sit silent without running engines for over two days) they would crack open the lime to remove the built up CO2.

McBeck · 06-18-07, 04:35 AM

[quote=Takeda Shingen]

Quote:

Originally Posted by Alky

Quote:

10,000+ posts... holy moly!!

Don't be too impressed. Most of them were quotations of Abbot and Costello routines.

And various court martials...wasnt Hitman the judge??

06-16-07, 05:20 PM	#1
Alky Lieutenant Join Date: Jun 2007 Location: Abbotsford BC Canada Posts: 258 Downloads: 141 Uploads: 0	A really noob question... How do you replenish the oxygen or is it important? I have the game set to easy because I don't know squat about subs. I tried running on the surface but nothing changed __________________

06-16-07, 08:40 PM	#4
CaptainHaplo Silent Hunter Join Date: Apr 2007 Posts: 4,405 Downloads: 31 Uploads: 0	What Spock said - along with a Welcome Aboard! __________________ Good Hunting! Captain Haplo

06-17-07, 08:53 PM	#11
GTHammer Machinist's Mate Join Date: May 2007 Location: Iowa Posts: 127 Downloads: 4 Uploads: 0	Ok this might be a dumb questions/series of questions but... How do they deal with the CO2? Do they use scrubbers like on space craft? If so then shouldn't they be able to just change the filters and with enough filters etc then shouldn't they be able to stay down as long as they have fresh Oxygen to add to the air? __________________ GT USS Hammer

06-16-07, 05:42 PM	#2
spock1898 Watch Join Date: Mar 2007 Posts: 21 Downloads: 0 Uploads: 0	The CO2 meter should be empty most of the time, indicating a full supply of breathable air. Surfacing should take care of this. The longer you run at depth, the more carbon dioxide will build up, leading to bad things . It does seem counterintuitive for 3 of your 4 meters to read near full almost all the time with one that should read near empty most of the time. Don't worry, if the CO2 meter is empty, you're fine. Just make sure you start heading toward the surface when it starts reading more than about 80%.

06-17-07, 04:13 PM	#5
spock1898 Watch Join Date: Mar 2007 Posts: 21 Downloads: 0 Uploads: 0	No prob Alky, though it would have been much more logical to have an O2 meter instead of a CO2 meter. Has anyone else stopped to consider this? Historically, which did real subs have, or did they have both? Sorry, I just couldn't resist a good Spock-ism.

06-17-07, 07:33 PM	#10
Xelif Seaman Join Date: Dec 2006 Posts: 37 Downloads: 0 Uploads: 0	As far as I know, they use a CO2 meter because that's what is most important. When you're underwater for great lengths of time, I believe the buildup of carbon dioxide becomes toxic more quickly than a lack of oxygen. Think of the spacecraft Apollo 13 and the movie about it - CO2 buildup was the problem, not a lack of oxygen. I know that the human brain detects/signals the need to breathe by sensing rising blood acidity - this is caused by increased carbon dioxide dissolving into ah carbonic acid I believe in the blood. So our brains detect CO2 levels in the blood rather than oxygen levels

06-17-07, 09:58 PM	#12
Xelif Seaman Join Date: Dec 2006 Posts: 37 Downloads: 0 Uploads: 0	I have no clue about the air systems on WW2 subs. I believe I have read about oxygen candles, and maybe even the use of lime to counteract acidic carbon dioxide in various forms... but I have no references! Whee. How useful. I also think the terms 'oxygen' and 'air' may be used interchangeably in some contexts, further confusing in my mind what exactly is going on - O2 added, CO2 removed, or both? Perhaps the technology wasn't quite advanced enough by that point to allow full air rebreathers. I know that as a technology for divers, air rebreathers weren't available until some time after the war. By air rebreathers, I mean a technology that processes your exhaled air to remove the CO2 and add in O2, or a technology that strips that pesky carbon and returns O2 directly... It might have been a low priority in research back then. Nuclear subs generate O2 by splitting water, as far as I know, but I don't know how they get rid of the CO2. Filters can be annoying as they have to be replaced, I know that much, and nuclear subs are legendary for submerged duration. Venting would be a simple option.

06-17-07, 10:32 PM	#13
Powerthighs Beach Leaf Join Date: Apr 2007 Location: Seattle, WA Posts: 287 Downloads: 11 Uploads: 0	I believe the CO2 in nuclear subs is removed from the air through a chemial process.

06-17-07, 10:56 PM	#14
Centred75 Watch Join Date: Jun 2007 Posts: 21 Downloads: 0 Uploads: 0	Other than the lime absorbant which was usually used only in emergencies (as it was pretty much one time use only, like your brita/pur water filters) submarines of that age just let the CO2 build up in the air (hense the CO2 meter). Subs were designed in such a manner as to allow them to operate submerged long enough that the batteries would run dry before the CO2 levels became dangerous. If situations prevented the sub from surfacing (say they had to sit silent without running engines for over two days) they would crack open the lime to remove the built up CO2.