[PSUBS-MAILIST] cold weather effect on ports

[Sean T. Stevenson]

One presumes that there could potentially be an issue with either thermal shock to the acrylic window, or with o-ring compliance when taking a sub at thermal equilibrium on a frigid deck (-30° C) and immersing it in seawater at ~0° C.  It takes some time for both acrylic and elastomers to warm up - they are poor conductors of heat.  Don't the o-rings stiffen in the cold?

Sean


  <MerlinSub at t-online.de> wrote:
>Hi Hank,
> 
>the limit according to GL is -18 celius degree 
>- a temp seawater can not reach. 
>
>The max temp to GL is 66 degree.
>
>In general colder is better for the pressure resistant of the windows
>(acryl). 
>
>vbr Carsten
>  
>
>"hank pronk" <hanker_20032000 at yahoo.ca> schrieb: 
>Is there an adverse effect from cold temperatures on ports.  I hear
>about cold weather dives in the North Sea etc.
>When is it to cold for ports if ever?
>Hank
> 
>
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