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As Andy knows - we're in the same club and were out on the same rib when
the IIa he mentioned and mine failed on the same dive - my nemesis worked
fine for the first 6 or so months.  It was returned to Cochran when it
refused to switch on - and yes we had changed every battery in the unit.
It was replaced with a 'new?' unit - I say 'new?' as it had a lower serial
number than my first and so was possibly a refurbished one.  I have not had
a successful dive with the new unit - switched off in the middle of the
first dive and now won't register pressure - so it is on its way back to
Cochran.  I still use my Aladdin (as well as tables) for backup - I'm not
sure I'll ever dive with a Nemesis alone even as a timer.  I like the dive
profile that you can down load from it but it's an expensive profiler.  As
soon as someone else comes out with a unit that will detect and monitor gas
switches I will be seriously considering changing.  I thought that perhaps
the problems with the Nemesis were teething problems and was willing to
bide my time to get through it - but they haven't even got it right with
the IIa.  The idea of a backlight is good - but does it have to come on
when tapped even when the wrist unit is switched off.

I agree with Ray - for the cost of the unit we should not have to put up
with such a high - ??100%?? fail rate of the unit.  I have yet to hear from
anyone who has dived with a nemesis for some time without a problem.   As
for the Aladdin - I only know of one fail and considering the difference in
the number of users......  With the sale of goods act in the US how do we
stand for getting our money back as I feel I have wasted the 800 UK pounds
it cost.  I have a theory that the cost of the unit is so high to cover the
replacement/shipping costs of the replacement you need just about every
other time you dive.  My husband has one - and yes his has been replaced
too - so that's 1600 pounds we have put in Cohrans direction for something
we can't rely on.   Yes I know you shouldn't rely on a computer totally
without backup - but there is a limit.  I feel I use the nemesis as the
backup.  If it's close to what I'm expecting then it's OK otherwise it's
back to tables or the Aladdin and just sit out the extra deco time
expected.  In fact having said that I may consider switching to a Nitrox
computer from a reliable company that doesn't take into account gas
switches - at least I'll then get the benefit of some of the nitrox dive.

For a while I used to recommend the Nemesis but warn of the high rate of
fail - however I will no longer be recommending it to anyone unless I start
hearing of a major improvement in realiability.

Sue
SD1621@gg*.co*.uk*

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