caveseeker7
Contributor
The Dräger LAR V is an O2 rebreather, so it runs on pure O2 without any diluent.
Max depth for normal operation is 6 meters, were the pO2 is 1.6 ata. For short
evasion of surface threads the military takes them deeper, all the way to 50 feet.
Since there is no nitrogen when the unit is properly purged there are no NDLs.
It's a very simple rebreather, gas addition from the small 1.5 or 2 liter tank is
manually by pressing a button. You know when you need to add gas when there
isn't enough in the bag. Scrubber is basic and notorious for being able to be
overbreathed (CO2 breakthrough). The unit doesn't even have an overpressure
relieve valve to prevent bubbles on ascent. The bag is breathed down before you
return to the surface.
There are some non-military applications, scientist use them, CA Fish & Game has
a few, that sort of diving. But for most part the shallow depth limit has little use
for recreational diving.
The other O2 rebreather I mentioned, the OMG C-96 that is available to civilians
has been converted for mixed gas use, either as a very streamlined CCR for
recreational limits or as a bailout rebreather backing up another CCR.
Diver Dave Sutton has very good teardowns of the Dräger and OMG rigs on
his website, as well
as his CCR conversion of the OMG and a bunch of other units.
Max depth for normal operation is 6 meters, were the pO2 is 1.6 ata. For short
evasion of surface threads the military takes them deeper, all the way to 50 feet.
Since there is no nitrogen when the unit is properly purged there are no NDLs.
It's a very simple rebreather, gas addition from the small 1.5 or 2 liter tank is
manually by pressing a button. You know when you need to add gas when there
isn't enough in the bag. Scrubber is basic and notorious for being able to be
overbreathed (CO2 breakthrough). The unit doesn't even have an overpressure
relieve valve to prevent bubbles on ascent. The bag is breathed down before you
return to the surface.
There are some non-military applications, scientist use them, CA Fish & Game has
a few, that sort of diving. But for most part the shallow depth limit has little use
for recreational diving.
The other O2 rebreather I mentioned, the OMG C-96 that is available to civilians
has been converted for mixed gas use, either as a very streamlined CCR for
recreational limits or as a bailout rebreather backing up another CCR.
Diver Dave Sutton has very good teardowns of the Dräger and OMG rigs on
his website, as well
as his CCR conversion of the OMG and a bunch of other units.
