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After reading such amount of messages about Independent Doubles, I would
like to point about two questions:

1- In some kind of dives (such as Florida caves) diving with an isolated
mainfold system is the safer procedure, (if the people who dive there
since long time ago uses iso mainfold it has to be probably the safer
procedure).

But there dives with other asociated problems 

2- you have to carry your tanks in a high mountain area, to a dry cave
that is one day walking from base, then enter the cave and descend to
-900 meter depth where is the sump we are going to dive, in the way down
there are several severe squezees, also the cave is very vertical wich
means that in the way up to surface we have to pull up along the ropes
all the gear during several days, for those reasons we decide carrying
only the equipment for a solo diver. We also don't know if the sump is
large enough to use a back mounted configuration or it should be small
passages wich would require side-mounted configuration, we also only can
travel once-per-year to that remote area so if any problem during the
transport aborts the dive we have to wait for the next year to do
another expedition to the area. I think that in that case the carriage
of a mainfolded system has several disadvantages vs independents (people
who dives this kind of sumps always use independents and very often with
side mounted configuration, so if they use independents it is probably
because it's the best choice).

If anyone think that diving in that kind of sump is not safe enough, It
depends on what you consider 'safe enough'. In this remote areas there
are other relative unsafe conditions, not only for the cave divers, also
for the simple cavers.

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