Re: [PSUBS-MAILIST] safety issues

[irox <irox@ix.netcom.com>]

I believe that is a very good rule to follow, don't dive in water deeper than your operating
depth, regardless of the safety margins being used.  Although, it's always possible to drift
away from the initial operating site and end up in deeper water.

For shall diving subs, it's important to have a greater % safety margin than deeper diving
subs.

Ian.


-----Original Message-----
>From: Paul Kreemer <paulkreemer@gmail.com>
>Sent: Jan 5, 2006 2:21 PM
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] safety issues
>
>That seems like a short amount of time!  Isn't it common to just not operate
>in water depths greater than your crush depth?  Or even your max operating
>depth?
>
>Paul
>
>On 1/5/06, Ian Roxborough <irox@ix.netcom.com> wrote:
>>
>> On Thu, 5 Jan 2006 09:41:08 -0800 (PST)
>> Robert Ossian <rob_neptune@yahoo.com> wrote:
>>
>>
>> One way of looking at the the margin is "how long do you have
>> to solve you problem before you hit crush depth".  With 150feet
>> safety margin, if you are sinking at 1 foot per second, the time
>> from max opteration depth to crush depth is 2.5 minutes.  If
>> you are decending at 2 feet per second, your time is 1.25 minutes.
>>
>> Ian.
>>
>>
>>




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