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  #11  
Old 02-20-2012
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Quote:
Originally Posted by Brent Swain View Post
No more hydros and visuals, which were happening too frequently and costing ever more.
It's been 36 years since I qualified - can you elucidate that code?
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I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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  #12  
Old 02-20-2012
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Quote:
Originally Posted by Zanshin View Post
.....when I'm at 70 feet and have been down there long enough to need a 3 minute stop at 15 feet.....
That's a long time at 70 ft. Over 45 mins conservatively, even longer if using a dive comuter. Most (not all) could not get a standard tank to last that long at that depth. Although, a 3 min hang means you didn't blow it by much. Not worth the few extra mins below.

On the other hand, you may mean a standard precautionary decomp stop. If one wants to use a hookah, they could always hang a bailout bottle at 15 ft on their down line, in the event of a failure.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
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Old 02-20-2012
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Quote:
Originally Posted by Minnewaska View Post
That's a long time at 70 ft. Over 45 mins conservatively, even longer if using a dive comuter. Most (not all) could not get a standard tank to last that long at that depth. Although, a 3 min hang means you didn't blow it by much. Not worth the few extra mins below.

On the other hand, you may mean a standard precautionary decomp stop. If one wants to use a hookah, they could always hang a bailout bottle at 15 ft on their down line, in the event of a failure.
Ok I give up what's a hookah? I did a google search and found a million hits but most all were this???

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Ok I give up what's a hookah? I did a google search and found a million hits but most all were this???

Close. Replace the tobacco with a compressor.

Brownie's Third Lung
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Damn I knew it..... But the other might be more fun.

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Be aware oillesss compressors can overheat and pump poisonous gasses into the tank. There are no sensor or safety systems available to stop filling a tank if the compressed air is contaminated.

Larger oil lubricated compressors produce hydrocarbons which can be detected and either filtered or the system turns the compressor off.

Maintenance on compressors filling breathing air into tanks is essential to safety.
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Originally Posted by Minnewaska View Post

tobacco????
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The biggest consideration for compressed air is the quality of the intake. If you have to run the genset to run the compressor, you need to be very careful that the genset exhaust isn't being blown over the compressor intake. Blood cells love carbon monoxide, something like 8-1 over oxygen, leaving no room to carry O2. Breath it under pressure and you're toast. A filter isn't good enough for me.
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Genset running at anchor, intake at front of boat separated by 50 feet - regardless of wind direction the input air is clean, unless one anchors directly upwind of a pollutant.
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Last edited by Zanshin; 02-21-2012 at 06:46 AM. Reason: added distance
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Old 02-21-2012
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Originally Posted by SloopJonB View Post
Think of the time & money you'd save if you could just scrub your bottom regularly instead of hauling & painting.
Regular hull cleaning does not replace anti fouling paint. You still need new paint every 2-3 years. Hull cleaning is simply a normal part of maintaining that paint.

Quote:
Originally Posted by SloopJonB View Post
Agree with Zanshin about diving deep with one - I'd stay above 50'. Going to decompression depths sounds too much like old style hard hat diving, the mere concept of which always gave me the creeps and claustrophobia. It also killed a LOT of divers.
Decompression depths begin at 33', not 50'.
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