Originally Posted by GordMay
I can’t work out where you get the idea that yachts are targeted, whereas commercial
tankers are not.
I thought that the International Convention on the Control of Harmful Anti-Fouling
Systems on Ships (AFS Convention) applies to all ships
Actually it comes from the original version of the international treaty - from: Anti-Fouling Convention | MaritimeCompliance.com
As a first step, the Committee at its thirtieth session in 1990 adopted resolution MEPC.46 (30) on ``Measures to control potential adverse impacts associated with the use of tributyltin compounds in anti-fouling paints’’, which recommends that IMO Member Governments adopt measures to eliminate the use of anti-fouling paint containing TBT on non-aluminum-hulled vessels of less than 25m in length and eliminate the use of TBT-based anti- fouling paints with an average leaching rate of more than four micrograms of organotin per square centimeter per day. These recommendations were intended to be interim measures until IMO could consider a possible total prohibition of TBT compounds in anti-fouling systems.
It seems that in 2001 the "INTERNATIONAL CONVENTION ON THE CONTROL OF HARMFUL ANTI-FOULING SYSTEMS ON SHIPS, 2001
" did extend the ban to all ships - except - as provided in Article 19 - "(1) This Convention may be denounced by any Party at any time after the expiry of two years from the date on which this Convention enters into force for that Party.
so that those governments who do not want or agree with the total ban can "opt out" of the "convention." And according to earlier searches the USA has still not ratified the treaty/convention which merely means that US EPA rules are the only source of restrictions on TBT, etc.
- - In real life practice as far as "Cruising Boats, Cruising People . . ." are concerned TBT is legal
and available "over the counter" in the Caribbean
Basin countries except maybe the French Islands or other islands still under the control of the E.U. countries.
- - An earlier comment about TBT paints not being effective in the most northern latitudes like New England
the and Pacific North West or where the waters are naturally really cold - (whew) is quite true. What most folks new to cruising boats learn eventually is that one type/brand of bottom paint
does not work "everywhere." Which is why there are dozens or more different brands and types of bottom paints on sale
. Regional waters have different native organisms and different environmental temperatures which all affect the "potency" of different biocides. The most effective way to find out what works in your area is simply to visit lots of boatyards
and talk to boat owners about what they use and how good it works. So TBT or the new Zinc paints only work well in certain regions and don't work in other regions. But that's a different thread . . .