Mark,
You always want the lowest volume  wings to get the job done. Using a wing
much larger than you need, will cause poor diver trim, it will be less
hydrodynamic, and a very high capacity wing will actually start to become
dangerous as it goes beyond 25 or more pounds of excess lift on the
bottom --relevant in tropical conditions with light doubles.
Halcyon  37,  45, 55, and 65 lb wings for doubles--their Explorer
line ---the 65 is  for the larger volume steels and multiple stage bottles
used only in cave diving, and is most likely more lift than you will want
from your description.
With any of the Halcyon wings, you have additional lift should you need it,
from the Surf Shuttle or Supra CC (Closed Circuit) Lift bag which stores in
the back plate pouch ( between your back and the plate. Either can be used
just like a BC for ascent, by regulating the dump valve. Each connects to
the low pressure inflator hose, with a special No Lock connector, so their
is no danger of not being able to remove the connection the moment you have
enough air in it.
With this redundant lift capability, you should be more comfortable trying
to optimize your lift to the dive plan.
Regards,
Dan Volker

> -----Original Message-----
> From: Mark G. [mailto:markg@pa*.ne*]
> Sent: Thursday, October 22, 1998 9:36 AM
> To: Cave Diving Mailing List; Technical Diving Mailing List
> Subject: question re New BC
>
>
> its time for a new bc to be used exclusively for doubles; I have
> been using
> the seatec in one form or another for the last 10 years, and the diverite
> the two years before that.
>
> Any comments on which size to get?  the current choices seem to be #45 and
> #65 pounds of lift.  The seatec worked well, but was marginal on lift; I
> don't want to go any lighter and would prefer an extra #5 or so lbs. lift.
> The default is the #65 model, but if I could get away with the 45 I would
> prefer that.
>
> Any idea what the lift capacity is on the seatec?  this is for comparison
> purposes.
>
> Comments on why I should or shouldn't go with the 45?
>
> Any personal preferences are welcome, but this is a question of LIFT, not
> brand.  The 45 would seem to be enough, but I don't want to buy
> it and find
> it wont work.
>
> as far as equipment; I dive with RENTED doubles, so they are
> either steel or
> aluminum, random brands, etc.  dependent upon who has what when I
> show up to
> dive (in Fla. or Mexico; cant fly doubles very well from California).  The
> seatec seemed to work well on everything up to steel 104s and a
> single stage
> bottle, but it was FULL with that setup and had NO margin.
>
> My leaning now is to get the 65 and forget about it.......
>
> thanks.
>
> mark
>
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