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> An intro is in order, since this is my first message to the list. My name is
Al
> Longtin, and I live in Toronto, Ontario. I've been diving since '89; have
> expereince in mild-deco, deep air, and wreck diving. I currently hold an Acuc
> Divemaster cert, and will hopefully add a tech nitrox cert to use a higher
> PO2 mix in longer deco obligations.

> Does anyone have any experience with using Dacor regs, specifically the
> Extreme Ice?

I currently use the Dacor Extreme Plus reg which has the same modular first
stage as the Ice.  I have been relatively happy with the regulator with
the one exception of having it try to deliver too much air until below 
60-70'.  It is only a minor inconvience to turn down the adjustment knob
on the ascent for deco stops, but worth it for the ease of breathing at
depth.

> Also, what are the opinions concerning gradual wreck prenetration versus
> using a reel?

The debate over progressive penetration versus guideline usage should be
based on a myriad of variables.  These variables include such items as
your level of training, familiarity with the particular wreck, purpose of
the penetration and your comfort level.  In terms of training, have you
been properly trained in the different methods of running a continuous 
guideline, i.e., number of tie-offs, how to tie-off, how to properly lay
line as to not interfere with other divers on the wreck?  Have you dove
the wreck enough to identify your precise location from almost any exit
point, by identifing features on the wreck can you then determine the
position of the anchor line?  In terms of the actual penetration is the
a pre-set goal that has been fairly thouroughly researched, have you 
examined deck plans, or do you just want to take a peek inside?  Exactly,
how comfortable are you on the particular dive, are you running a
continous guideline or bolstering a false confidence?

Taking these variables in to account, my opinion, is that the right answer
is using the two tools in conjunction with each other.  A well run guideline
can be a useful navigational tool; however, without careful observation of
the wreck it can be a dangerous security blanket.  A series of well planned
penetrations can give the diver an excellent mental picture of the interior
for silt out situations; however, without a guideline potentially precious
moments could be wasted while determining exact location and exit points.

Just my opinion,

Tom

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