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Kevin McCready

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Posts posted by Kevin McCready

    Priced off the poles - what areas to look for a small mooring?

    in MarineTalk

    Posted

    There's a public rack at the moment at The Landing at Okahu Bay but it's not very secure and the plan is to get rid of them I think. My well locked up dinghy was pinched from there. BTW there are no moorings now in Okahu Bay, I meant to say Hobson Bay where we've all been moved to. There are also a few lock up sheds for hire. I currently put my dinghy on top of the car and row out.

    Priced off the poles - what areas to look for a small mooring?

    in MarineTalk

    Posted

    Okahu Bay is fine. But make sure your boat has big cleats so it doesn't get parted from the mooring in storms. Most which end up on the wall have the cleats ripped out of the foredeck. When I moved my Easterly 30 there I got the cleat bulked up and I also tie off around the anchor winch and the sheet winches. I even wrap up the buoy rope securely too, so it's still attached to the mooring, although with enough slack to avoid chaffing.

    A new (zealand) copper antifoul system...

    in TechTalk

    Posted

    1. If the authorities were serious about avoiding marine pollution, which is what antifouling is, they'd make it simple for anyone who wants to to wash down their boats every few weeks. When Alan Gibbs was alive and sailing his Reactor and winning most of his races he never used antifoul. Instead. he regularly washed down on a tidal pole.

    2. CC has always been tricky to apply and expensive. If I was to get it I would insist on a warranty, an escrow and some independent 3rd party in the case of dispute. The stuff I've cobbled together below, including form earlier crew posts may be of interest:

    ---------

    https://www.youtube.com/watch?v=QHyxgwUf6dk
    can work great but MUST MUST MUST be applied properly. Maybe some batches don't work. The hull must be cleaned and sanded right back to the original gelcoat and keyed with 120 or 80 grit sandpaper, the application should be carried out in one day or as we did as there’s was only two of us apply to one side of the boat one day the other side the following day we had 13 litres of Coppercoat so we managed to apply 5 x coats per side, applying each coat once the previous coat and dried sufficiently (tacky), the boat must then be left for at least 3 days to dry then move the stands and blocks apply to those areas and wait another 3 days then sand the Coppercoat with either Scotchbrite pads or light sandpaper till you can see the copper sparkle then back in the water. If the above application process was not followed exactly then that may be why you are having issues if the Coppercoat is mixed correctly and stirred frequently while in the container or tray.and the above followed all should be well
    .
    When we applied we stripped back all old antifoul and did a good based coat of interprotect, to give a good clean sound base. On the application, the CC should be applied wet on tacky. If the whole boat can't be done wet on tacky in one go, the advice was to do half (one side) fully, then the other side. We did about 5 coats total. If it doesn't go on wet on tacky, the bond between the two coats is distinct. I'm not a coatings expert, but I assume this isn't good when the top coat slowly abraids back to the joining layer in the future. So your 'touch-up' work doesn't sound ideal. More so if the base CC it went on has already aged green. Your last two photos look like the hull base is very rough in its preparation. You shouldn't have the pronounced edges and pits etc. I'm only aware of two issues with CC application. Putting it on in such a way that you get runs in it (which isn't a major, it just leaves runs in it). The other issues we had a very little bit of, and I'm aware another boat had a bit of, is a thing like pox (like osmosis pox on a glass boat) these are blisters that form and then burst with over vigorous scrapping. They are to do with moisture or the temp of the surface on painting. We got a few on the shaddy side of our lead keel, which would have been cooler and not necessarily dry. The reason I mention them is ours didn't appear for several years. I understand the quickest they turn up is circa 6 months. They can be treated by grinding out and applying touch ups. To get the 10 years performance life out of CC, you need a certain thickness of product. The quality of prep and soundness of the base coat will influence risk of it falling of over that 10 year life. If quality of prep was poor, then this pox issue could become apparent in a year or two.
    /
    selektope.com
    /
    John B: I've had a remarkable run out of 66
    2007"proper job"( 3 or 4 tins of it)
    2010, leading edges, rudder and some of the keel recoated and back in.
    2012 same but just before relaunch I thought another coat would be worth doing.So I put a one tin thin coat on.
    2015 haul and a 'proper job ' again.
    In between she gets a dive clean or a floating dock water blast. In fact this year we did a floating dock and a hard sand back about 3 months before to make this haul a little bit easier.
    /
    harrytom: altex no 10 for me. applied last november,cleaned off late february,cleaned off 3 weeks ago,no barnacles only slime,so will use again.boat spends more time swinging on mooring than used.Tamaki river
    /
    Scubash has just posted a new topic entitled "Hull cleaning" in forum "Marine Talk".Anyone in need of hull cleaning, please contact me here in a pm or via phone. 0211706138
    'anti foul copper etc bad.pdf'
    1. fungus Streptomyces avermitilis at 0.1% in paint kills barnacles. Hans Elwing Goteborg Uni. Aug 2009
    2. One challenge in creating such a coating is that the critical length scales involved in organism attachment range from hundreds of nanometers to centimeters. Efimenko et al. have developed polymer coatings that possess a hierarchical wrinkled structure. They stretched and then cross-linked the surface of poly(dimethylsiloxane), after which they applied a fluorinated silane monolayer. On gentle relaxation of the stress, a rippled surface layer formed, wherein each wrinkle had smaller-scale wrinkles on top of it that themselves bore even smaller wrinkles, proceeding over five generations. In seawater tests, flat polymer films showed fouling after a few weeks, whereas the wrinkled polymers resisted barnacle accumulation over a period of 18 months. In tests on the adhesion of green algae zoospores, the wrinkled films performed less well, as the spores could nestle and be protected from shear flows and physical contacts within the wrinkles. However, a combination of topology and the right surface chemistry conferred improved resistance, pointing toward development of a nontoxic universal antifouling coating.
    ACS Appl. Mater. Interfaces 1, 10.1021/am9000562 (2009).
    /
    Karen wooley - dolphin skin antifoul, for all its seeming smoothness, is slightly rippled on the nanometer scale. Still, these ripples are not large enough to hinder movement through the water but are small enough that they leave few "niches" for marine creatures to grip.
    "For a long time antifouling work was geared toward making super-smooth surfaces," explained Wooley. "It was thought that if the surfaces were super-smooth and had less surface energy then the organisms couldn't attach.
    "In fact, that's completely false," she continued. Her current antifouling project "completely goes against the grain … Wooley formulated the idea of mixing two normally incompatible polymers -- a hyperbranched fluoropolymer and a linear polyethylene glycol -- and allowing them to phase-separate into distinct domains, one interspersed in the other. A chemical process called crosslinking then solidifies the mixture, thus creating a heterogeneous coating that, upon close examination, reveals treacherous nano-sized terrain composed of mountains and valleys, ranging from hard to soft, hydrophilic to hydrophobic. .. "When the polymer surface is first prepared, it looks like a bunch of sub-microscopic mountains but when it's placed under artificial sea water, the entire surface swells and gives us this inverted structure," Wooley explained. "I think this is really exciting because what it means is that we can 'tune' the size of the surface features and determine whether our hypothesis is really correct
    /
    re antifouling agent, octadecylamine, Tauranga Harbourwatch would like these discharges stopped until such time as research shows them to be benign.  Hylton Rhodes, Tauranga Harbourwatch Inc
    /
    Oriana Brine doing masters Auckland Uni on non-indigenous biofouling.  Antifouling. See boatie file
    373 7599  x88483  = marine sciences lab
    Obri005@aucklanduni.ac.nz
    Risk factors for biofouling of recreational vessels moored in berths or on swing moorings Survey.htm
    /
    Hempel - Hempasil X3
    The latest non-toxic solution to barnacles and growth on the hull. Not antifoul but non-stick fouling release - containing no biocides and with lower solvent emissions. Technology as yet only used on ships because of the specific method required for application.
    www.hempel.com

    Fisheries amendment act, rescuefish and legasea

    in MarineTalk

    Posted

    C'mon Harry. Have another look. They're not vigilantes; it's a joint project with MPI etc. As for the young man he impressed me. I don't know if you've ever done a standup media interview - it's not easy but he did well. He appears to be a qualified skipper which is not an easy ticket to get and he's had 5 years experience with the Harbourmaster and knows about de-escalation techniques. Tell me what more you'd want to see. It's also a pilot project so let's hope it goes well. All power to their arm I say.

    • Upvote 2

    Rescue in Bream Bay, DIY style

    in MarineTalk

    Posted

    Heart attack victim here. If you experience any symptoms call 111. I was very lucky. The genetics of my family mean we don't clear cholesterol properly. One brother dropped dead at 52, another brother had a heart attack in his 30s. I went to hospital complaining of severe shortness of breath while out running. I was super fit and the young registrar in ED wanted to discharge me but then he thought he should double check with a more senior doctor in cardiology. They then said you are aren't going home. Triple bypass (bumped up the list because a Jehovah's Witness didn't want to risk a blood transfusion, thanks bro). Later my GP said you've had a heart attack. I said no I just had shortness of breath and they got it early. GP then showed me the blood tests and explained. Yep. Heart attack. It was just over a year ago and I'm back running and haven't felt this good for a long time.

    Looking back I had noticed strange pains in my arms for a couple of weeks prior and noticed I was slowing down. I wrongly attributed this to getting old. It's possible the Latitude 28 guy may also have noticed something strange in the weeks prior. So again, if you have the slightest doubt, phone 111 or get yourself to ED.

    Mooring holder wins case

    in MarineTalk

    Posted

    I've dealt with a very senior council bureaucrat in compliance. Not to put too fine a point on it, he was a two faced prick. But you're right about incompetence. His lower level subordinate administering a hardstand contract over council land did not have a clue and should not have been in the role. 

    Mooring holder wins case

    in MarineTalk

    Posted

    Cameron, it's possible in a legal case, as in the war in Ukraine now, that there is disgusting despicable behaviour on both sides. It's pretty clear that council lied. My guess is they thought they could get away with it and might have done had not Bolton's estate had the council receipts. 

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