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Hank,

   Put some survey knots on your safety reel every 10 feet.  Shoot a
bag, then you can use it for contingent gauge. 

    John

GarlooEnt@ao*.co* wrote:
> 
> hi bill
> i would just like you to carify a few points you made here. i want to be sure
> i
> understand you meaning.
> 
> are  you saying that you should mark the anchor line every ten feet so you
> have a point of reference if you BT drops dead?
> 
> how do you adjust for scope in the anchor line, & be reasonably acurate?
> 
> hank
> 
> In a message dated 5/21/1999 10:42:21 AM Eastern Daylight Time,
> wwm@sa*.ne* writes:
> 
> << Susan,
> 
>  I would hope that when you dive in the ocean you do so off of a drift float
>  line or an anchor line. In the case of a drift float you can knot the line
>  every ten feet and in the case of an anchor line you can mark the depth and
>  estimate your real depth by correcting for the scope (if you are that
>  picayune). Neither of these options requires any artifice other than common
>  sense
> 
>  Unless you are spacially challenged I would think that it is pretty easy to
>  reference approximate distances on a line from the surface. Anyhow, for the
>  sorts of exposures you can reasonably be expected to encounter in the ocean
>  most of your deco is from 50 ft on and the times are not that critical
>  (unless you have a pfo or you are an HFS in which case you shouldn't be
>  diving in the first place).
> 
>  As for risk management, I never cease to be amazed by the lack of judgement
>  and foresight related to thinking through the risks of tethered and
>  untethered deep water diving. Considering through the eventualities in the
>  first place and thinking about your response to the myriad situations that
>  can occur is the real challenge to ocean diving.  Avoiding stupid high risk
>  situations, knowing when when to hold em and when to fold em and above all
>  not diving to "prove something" to your peers or yourself is the real mark
>  of a pro.
> 
>  Best wishes,
> 
>  Bill Mee
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