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      I don't know...maybe fluorescent tower but more than that would be
      pretty thugly I think.  I'd rather include a flashing beacon for
      surface visibility.<br>
      Jon<br>
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      On 10/21/2014 6:49 PM, Sean T. Stevenson via Personal_Submersibles
      wrote:<br>
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        <div><span style="font-family: arial,helvetica,sans-serif;">No
            reason for a PSub not to be as visible as possible.  As for
            colour, I found a relevant study:</span><br>
          <br>
          <span style="font-family: arial,helvetica,sans-serif;"><a class="moz-txt-link-freetext" href="http://www.worksafebc.com/contact_us/research/funding_decisions/assets/pdf/2009/RS2009_IG30.pdf">http://www.worksafebc.com/contact_us/research/funding_decisions/assets/pdf/2009/RS2009_IG30.pdf</a></span><br>
          <br>
          <span style="font-family: arial,helvetica,sans-serif;">Fluorescent
            green above the waterline, flat black below?</span><br>
          <br>
          <span style="font-family: arial,helvetica,sans-serif;">Sean</span></div>
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