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06-01-2017, 23:10
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#166
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Registered User
Join Date: Jul 2015
Posts: 313
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Re: Barnacle removal without scraping
Cruise Ships Dump About A Billion Gallons of Raw Sewage in the oceans a year
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06-01-2017, 23:15
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#167
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
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The fact that cruise ships dump raw sewage and the fact that you posted a pic of a cruise ship doesn't mean you posted a pic of a cruise ship dumping raw sewage.
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06-01-2017, 23:22
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#168
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Senior Cruiser
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,888
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
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Please note the gratuitous and erroneous insertion of the word "raw" here!
And from the link: "That’s according to Friends of the Earth"
Are you claiming that the majority of cruise ships contravene MARPOL?
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09-03-2017, 01:13
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#169
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Registered User
Join Date: Mar 2017
Posts: 3
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Re: Barnacle removal without scraping
Quote:
Originally Posted by Bob1201
Alan, I might add that you should get about 5 years with --- easy enough to jump over the side after 3 years, and check how it's going. The Oxy is now available on line, in my day I had a mate who was a chemist ---- Who,
may I say, said it wouldn't work
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hi bob
can tetracycline hydrochloride mix with bottom paint to remove barnacle ?
Thanks
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09-03-2017, 02:37
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#170
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Registered User
Join Date: Dec 2016
Location: Darwin, Australia
Boat: Manitou 32 Ketch
Posts: 60
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
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Idiot greenies... the original article exagerated slightly, claiming that Billions of Tons of sewrage was dumped, THEN they changed it to billions of Gallons... could it be really billions of quarts?
Or is it billions of floating turds?
How many "Billion" people actually are floating around at sea?
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09-03-2017, 02:52
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#171
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Registered User
Join Date: Apr 2013
Posts: 11,002
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
Two to seven thousand people on a cruise ship, and this is what happens to their nastiness (and BTW - that ain't an oil slick)
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No it ain't. It's sand kicked up.
You can clearly see similar plumbs at the bow from the bow thruster. Cruise ships may or may not dump at sea but your picture provides no evidence of it.
Reality is at 20-25kts a half out out on the open ocean, there is no ecological or health impact to dumping overboard.
For fecal mater, the solution to pollution really is dilution.
(small bays or inland waterways are a different matter for such a large point source)
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09-03-2017, 02:53
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#172
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Registered User
Join Date: Dec 2016
Location: Darwin, Australia
Boat: Manitou 32 Ketch
Posts: 60
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Re: Barnacle removal without scraping
We dry docked Sayonara Alpha in Marseille and painted the bottom with a very toxic blue paint (burnt the skin on contact) before 6 months Med then crossing the Atlantic, where it was "OK guys, get overboard and clean the bottom".
A 120', full length keel, yawl drawing 14' of water.
We did it with scotch brite kitchen scrubbers, weight belts and snorkels.
It took 2 of us at a time about a week. We had to remove a few tube barnicles we picked up crossing the Atlantic, but mostly it was just green slime.
Kitchen scrubbers work just fine.
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09-03-2017, 03:18
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#173
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Registered User
Join Date: Sep 2006
Posts: 9,398
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
OK, I'll bite - are you suggesting cruise ships don't discharge raw sewage into the oceans - and are you just saying your opinion of the photo is that the ship is just kicking up bottom from its thrusters?
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Cruise ships don't discharge raw sewage. They have holding tanks.
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09-03-2017, 04:26
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#174
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Senior Cruiser
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,888
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Re: Barnacle removal without scraping
Quote:
Originally Posted by valhalla360
No it ain't. It's sand kicked up.
You can clearly see similar plumbs at the bow from the bow thruster. Cruise ships may or may not dump at sea but your picture provides no evidence of it.
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What do you expect? That picture came straight out of the Greenpeace pamphlet that the press release was based on. It's typical of their distorted propaganda.
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09-03-2017, 04:33
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#175
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Registered User
Join Date: Jan 2015
Location: Thhe boat is in Titusville, FL and we're back in CO for a few months resupplying the cruising kitty and raising money for our childrens dental charity www.sailing4smiles.com
Boat: 1982 Cape Dory 36 Hull #78
Posts: 656
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Re: Barnacle removal without scraping
Fstbttms, the video was strangely relaxing....wierd. Anyhow, what's on your left wrist that held the screw? I want one.
Also, I'm in the Gulf of Mexico and get little barnacles at the waters edge. I've used wood shims and plastic drywall knives to scrape them off when I go too long between cleanings. Am I hurting anything?
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09-03-2017, 07:44
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#176
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by pohchyetay
hi bob
can tetracycline hydrochloride mix with bottom paint to remove barnacle ?
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Good luck getting a response. In addition to providing some exceedingly bad advice, Bob's very brief time on this forum ended almost two years ago and he hasn't been back since.
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09-03-2017, 07:47
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#177
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by SSgtPitt
Fstbttms, the video was strangely relaxing....wierd. Anyhow, what's on your left wrist that held the screw? I want one.
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Thanks for watching! I am simply tucking the screws under the wrist strap of my wetsuit glove.
Quote:
Originally Posted by SSgtPitt
Also, I'm in the Gulf of Mexico and get little barnacles at the waters edge. I've used wood shims and plastic drywall knives to scrape them off when I go too long between cleanings. Am I hurting anything?
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Using a scraper of any sort ain't doing your paint any favors. But you gotta do what you gotta do.
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09-03-2017, 08:33
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#178
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Senior Cruiser
Join Date: Oct 2007
Location: 29° 49.16’ N 82° 25.82’ W
Boat: Pearson 422
Posts: 16,306
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Re: Barnacle removal without scraping
Quote:
Originally Posted by pohchyetay
hi bob
can tetracycline hydrochloride mix with bottom paint to remove barnacle ?
Thanks
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Please, please don't do this. Antibiotics are already a problem in our water and food. They are persistent in the environment and unnecessary use of antibiotics significantly contributes to the development of resistant strains of bacteria that are becoming a major health risk in humans.
__________________
The water is always bluer on the other side of the ocean.
Sometimes it's necessary to state the obvious for the benefit of the oblivious.
Rust is the poor man's Loctite.
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10-03-2017, 01:13
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#179
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Registered User
Join Date: Mar 2017
Posts: 3
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Re: Barnacle removal without scraping
Quote:
Originally Posted by skipmac
Please, please don't do this. Antibiotics are already a problem in our water and food. They are persistent in the environment and unnecessary use of antibiotics significantly contributes to the development of resistant strains of bacteria that are becoming a major health risk in humans.
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Regulating authorities can therefore be assured that the use of tetracycline in antifouling paints dose not pose an environmental threat to marine ecosystems.
https://www.researchgate.net/profile...7ff74943a4.pdf.
tq
.
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10-03-2017, 05:13
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#180
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Registered User
Join Date: Apr 2008
Location: Punta Gorda, Fl
Boat: Endeavourcat Sailcat 44
Posts: 3,168
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
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Don't believe what you read on the internet. The article state that the manatees were killed by an algae bloom caused by coastal development, where in actuality it was caused by a release of nutrient contaminated water from Lake Okeechobee. The primary source of those nutrients is runoff from farm fertilizer. It also says that many states have laws against discharge in their waters. I'm not sure what they mean by states, states as in states of the United States, Nation states, City states? States of the United States don't need such laws as federal laws prohibit the discharge of raw sewage within 3 miles of land in all US states and territories from any vessel.
A billion gallons sounds like a lot, but in the grand scheme of things it's doesn't amount to squat. There are over 2 trillion gallons of sea water in a cubic mile of seawater and there are over 330 million cubic miles of seawater.
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