Scott, what you have been told is pure wash of hogs. They are imminently 
servicable, do not require a rebuild before or after every dive. Like all 
complex pieces of equipment, you must have proper training and most 
importantly- perhaps the most important thing- is that you must have 
experience with the unit- many hours- and you must own one personally and 
use it. The MK16 is not as good a unit for me as the Mk15.5. For the 
military- it may be great but for what I do it lacks some basic features 
which I would add to a 16 if I got one which I don't want because I 
already have a 15.5 that I have configured even further for my use. As a 
first test of anyone claiming to be a rebreather instructor, ask them if 
they own a rebreather. If the answer is no- even if there are claims that 
"I use one from the shop every day"- then tell them they are not a 
rebreather instructor. When they whip out their rebreather instructor 
certification card, note the agency and post it on techdiver so we know 
where we can buy rebreather instructor certification cards from a 
bullshit agency. Rod

On Wed, 26 Jun 1996, Scott Cherf wrote:

> At 7:23 AM 6/26/96, Dennis Pierce wrote:
> >it's more like 5k and all parts except the tanks of this unit has over
> >3.5 million man hours of testing on them all over the world for over
> >20 years.
> 
> Dennis -
> 
> Going back a couple of years, I recall long conversations about why the
> average diver shouldn't consider buying or using surplus military
> re-breathers (i.e. the Mk16 or Mk15.5) because the units had been designed
> for use by the military with no concern for servicability.  I know it
> was said at least once that 'these units require excessive amounts of
> pre-dive setup'.  Statements like 'you need to almost re-build the units
> after every dive' were made.
> 
> How much of this is still true with the CCR500, and how much of it was
> hogwash from the start?
> 
> Thanks,
> Scott.
> 
> 
> --
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