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It sounds as though you misunderstood what he was telling you or else he didn't know what he was talking about. The MK16 certainly can be "heliox-based" but that has to do only with what gases you put in the diluent tank. You can put in air, trimix, heliox, etc. There is not usually a mask associated with the unit unless it was fitted with a Aga or Widolf but neither of these has a red-green indicator to tell you when the scubbber is bad. To my knowledge there is not currently a reliable CO2 detector. The red green lights you are refering to are the lights on the primary guage that tell you grossly what the unit is doing in terms of the pO2 setpoint. Alarm means that you have to look at the secondary guage to see what the problem is. You can increase the scrubber time immensely by changing to a finer mesh product but you don't want to go so small that you have problems passing gas through it. There are no rebreathers that automatically change scrubber for you. The MK15 scrubber section was enlarged to produce the MK155 and MK16 units which resulted in greater dive time. There is much more and if you want to know contact me privately. Just remember, I may have to kill you if I tell you everything. Rod On Mon, 18 Dec 1995, jason wrote: > I was speaking to a new friend of mine at my unit; apparently he used to be > on a navy eod dive team. As we go to talking, we discussed the Mark 16 > rebreather unit that he had used. Apparently it is heliox based, and is > (according to the manual) capable of 300 feet for 300 minutes. Apparently > the limiting factor is the scrubber (I forgot exactly what he called it). > Apparently the mask has a red/green LED indicator that tells if the mixture > becomes hypoxic/hyperoxic, at which time you must manually change the > mixture. He also mentioned that some work at been done where the scrubber > had been enlarged which increased the dive time. He was fairly vague about > this, as he hadnt actually dived with it like this. Anyone else dove this > system before? Any more information, or is it classified, and I'm actually > spilling beans?? > > PPS, he did admit that there is NO bailout system, and he has never had to > do any deco dives on it (as far as the navy was concerned; apparently it > takes quite a bit of rank to authorize this..) > > Jason Richards > NSS/CDS 41539 > rchrds@ho*.co*.ed* > > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'. >
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