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Hi Brian,<br>
<br>
It looks to me that Rule 24(g)(i) of USCG Navigation Rules would
apply to submersibles. See
<a class="moz-txt-link-freetext" href="https://www.navcen.uscg.gov/?pageName=navRulesContent">https://www.navcen.uscg.gov/?pageName=navRulesContent</a><br>
<br>
The rule is that the light must be seen from a distance of at
least 3 miles. So height would be determined by line-of-sight
between you and whatever vessel might be around to observe you.
The higher the target vessel observation deck, the lower your
light needs to be. Assuming the target is a kayak with passenger
eyeball height at 3-feet (sitting position), you would need your
light to be one-foot high above the water. Depending upon the
buoyancy of your submarine you may not need a mast at all. See
<a class="moz-txt-link-freetext" href="http://www.calculatoredge.com/electronics/lineofsight.htm">http://www.calculatoredge.com/electronics/lineofsight.htm</a><br>
<br>
Jon<br>
<br>
On 7/23/2017 12:19 PM, Brian Cox via Personal_Submersibles wrote:<br>
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<div>The guy I was talking to said the Coast Guard wanted the
pole 16 feet high ! I think that is a bit much 10 feet would
be about the max I can see, other wise it would be hard to
stabilize . </div>
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