George originally felt that a life support system was too complex and thought you ought to come up and air the boat out every half hour or so. It worked for a long time, but didn't allow for accidents/incidents or plain old preoccupation. You should have a BIBS plumbed into your HP air as a back-up for smoke in the cabin and whatnot. Then a small escape bottle in case you need to...um, jump ship.
Vance
-----Original Message-----
From: ShellyDalg@aol.com
To: personal_submersibles@psubs.org
Sent: Sun, Oct 25, 2009 1:07 pm
Subject: Re: ambient pressure submersible life support - was [PSUBS-MAILIST] DeepWorke...
I'm not an expert on the K250 s but I beleive originally they had no
scrubbing system. & people still dive them like that,
I'm no expert either, but if you have 02 and C02 monitors, and a scuba reg. handy, you can dive as long as the cabin air quality lasts, and keep the scuba tank and reg as back-up.
I wouldn't go down without it anyway.
Frank D.