[Coral-List] Underwater signage
Scott Heron - NOAA Affiliate
scott.heron at noaa.gov
Sun May 19 19:42:23 EDT 2013
Two thoughts on this from my experience:
* Saying "WARNING" rather than "DANGER".
* Rather than 'radioactive', perhaps try "ELECTRICAL WARNING: 50,000
ohms."? Ohms are the units of resistance (better still, use the unit
symbol of capital omega rather than the word to look good). High
resistance is a safe thing; to the unknowing potential interactee, the
reference to electricity combined with a big number should be enough of a
On Sat, May 18, 2013 at 6:14 PM, martina <m.milanese at studioassociatogaia.com
> Nice idea!
> I will try it myself, and adapt it to our dataloggers (that are
> recurrently being stolen).
> They are little cute things with a pulsing red LED light - apparently
> very attractive to marine life covered in neoprene.
> Il 17/05/13 19.48, Michael Risk ha scritto:
> > Good day.
> > Many years ago [the statute of limitations has now run out] I was
> attempting to obtain settling rates of invertebrates on panels with
> different textures, set underwater at Catalina Island. I ran into terrible
> problems with treasure hunters/vandals/thieves damaging the experimental
> setups. So I devised a modified technique. I wrote my text on the panels
> using red nail polish, and then covered that with a fiberglass gelcoat. The
> panels themselves were simply soft wood 2 x 6 pieces, covered in
> fiberglass. What I wrote was not accurate, but was designed to repel
> > Worked like a charm. The panels were underwater for many months, the
> signage remained legible, and any algae could simply be wiped off.
> > A friend of mine, the manager of the Marine Lab, was standing on the
> lab dock one day when a dive boat pulled up, and a red-faced overweight
> irate diver jumped off. He said "Hey! I was just diving out on the rocks,
> and I saw some panels down there. I whipped out my knife and was going to
> collect them for my rec room, when I read the sign that said DANGER
> RADIOACTIVE. Am I in any danger because I came so close?"
> > Bob had a moment to think, this is the kind of guy that has just caused
> Mike to lose six months work. Then he said "Sir, you are in absolutely no
> danger. There is only a slight chance of any damage. Go home, and if you do
> not notice any change in your external genitalia over the next six months,
> you will know you are out of danger."
> > Several lessons here. First, don't try this at home. Second, a gelcoat
> over your text is a guarantee of longevity. Of your text.
> > Mike
> > On 2013-05-16, at 8:39 AM, Ruleo Camacho wrote:
> >> Good Day,
> >> I am attempting to create some underwater signage for a snorkeling reef
> >> trail but I have been having immense difficulty in obtaining a material
> >> which would be adequate to stand up to the rigors of salt water and and
> >> micro organisms. Any suggestions on what materials/methods may be
> >> for this use?
> >> Regards
> >> --
> >> Ruleo
> >> _______________________________________________
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> >> Coral-List at coral.aoml.noaa.gov
> >> http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
> > Michael Risk
> > riskmj at mcmaster.ca
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