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Date: Mon, 09 Aug 1999 08:05:50 -0700
To: "Guy Wittig" <wittig@bi*.co*>
From: S I L E N T I M M E R S I O N <silent@cu*.ne*>
Subject: Re: Modified DIR-Ocean
Cc: <techdiver@aquanaut.com>
Guy,

Not only does it interfere with the long hose and the cannister, also you
will have a different drag when swimming. Stages tend to move back and
forth (rocking) during swimming and would you use bilateral stages this
causes a 'spread wing' effect. More drag...
With all stages on one side you are balnced fine, never gave me a problem
ever. Using three stages on the left still creates no problems in balance.

Regards,

THOMAS

At 08:47 PM 8/9/99 +1000, Guy Wittig wrote:
>George
>
>Just to fuel the flames - would you mount both stages on one side when you
>are not using a scooter ?
>
>It seems that you would be better balanced (bouyancy and drag) with
>bilateral stages (if it were not for the scooter).
>
>Or does it interfere with the light canister and the long hose ?
>
>Guy
>
>
>> Steel tanks
>>> Let me say right off the bat that while I understand DIR uses aluminum
>>> tanks (and a weight belt), that is just not sufficient gas for a
>>> swimming deep gas dive with a sufficient reserve. Maybe a 10 or 15
>>> minute bounce dive, but our bottom times are routinely 20 to 30
>>> minutes at 200 to 350'.  A scooter could change this but most are not
>>> scootering.
>>> Double steel with aluminum back plate (light) and aluminum stages are
>>> needed.
>>> With this weight comes the need for redundant lift. (Here comes the
>>> flames)
>>> Two separate Halcyon or Diverite wings with a wet suit, or only one
>>> with a dry suit.
>>>
>>> Decompression stress
>>> In order to provide the maximum safety margin while using high ppo2
>>> deco mixes (with breaks of course) and to ease diver exertion on deco
>>> a Jon Line is essential.
>>> The best option, if available, would be to arrange a free floating
>>> deco line before hand. But if this is not available a Jon Line is an
>>> efficient tool.
>>>
>>> Spare Mask
>>> Since the ocean has no floor or ceiling like a cave, a spare mask is
>>> essential.
>>>
>>>
>>> Flame away fella's!!!
>>>
>>> Bill
>>>
>>> PS.  I would be interested in hearing from any other ocean divers who
>>> have any suggestions, as there is always room for improvement.
>>
>>
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>
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>
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