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Island Time

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Everything posted by Island Time

  1. Have been to Westhaven, just busy with work and did not pay much attention to it. Sounds like a right shambles!
  2. Yep, knew about the ones in GH. Still dumb, imo, but they are not directly in the water. Possibly not quite so dumb. Time will tell. Theoretically, if the steel bits are all connected, they have the same potential, but immersion in anything acidic at multiple points is asking for trouble. Yes, I know two types of metal and acid make a battery, but guess what - the earth wire is copper.... Directly in sea water, which is slightly acidic, is a recipe for disaster.
  3. Got any pics of the new structure KM? Surely they were not stupid enough to have exposed metal in the sludge? This is why wharf piles are timber, or special concrete and prep to ensure the reinforcing is protected from the liquids. Two exposed metal pylons could indeed form a battery, and if your boat is between them, or nearly so, it could be part of a circuit. The boat must have two exposed bits of metal, or something long and conductive. The pitted area is where the current leaves the boat. There must be an entry point, maybe rudder pintles or shaft? I do understand that in some
  4. OK, Yep that is uncommon. How about a bonding system? Metal thru Hulls? I'm thinking that the boat might offer less resistance than the water, and a stray current might by running thru it as part of a circuit.... If the centreboard is pitted, then that's the exit point. There must be an entry point somewhere. Current can't flow without a circuit. So, does the corrosion occur at coating imperfections, and have a dimple in the center - like this; This is an example of AC corrosion - Ive never seen a boat suffer from that, but this is an unusual case. Really requires a
  5. So no engine, no nav or any other lights, no battery at all???
  6. Its pretty simple, either the boat has an electrical connection to the dock, or the issue is on board. Please explain where Ive mistaken your post/s...
  7. Well, if the boat has no other connection to the dock, the marina is not at fault. The most common issue I find doing corrosion surveys is a bilge pump with failed insulation, standing in bilge water. To say nothing has changed is stretching it a bit. Things corrode, insulation fails, sometimes circuits are left powered on, or switches/circuit breakers fail. Shorts etc happen. All these things are fine until they are not. The easy path is to blame the marina - which almost all owners try to do. Remember than stray current corrosion is really a DC phenomenon - the reason that the AC groun
  8. No, because you are not connected to them with a circuit. The only common path is the water.
  9. Corrosion; OK, let me make this real clear. For a boat to be damaged by corrosion it has to be part of a circuit. That circuit can be via the water, and out of and back into (via the water) different bits of immersed metal on the boat. The least noble bit of metal will corrode. That's why anodes are sacrificial anodes, so nothing important is trashed. You are electrically linked to all other boats on the dock (thru the water), and to the dock itself if it has metal immersed. That is one arm of a potential circuit. The other common arm, completing the circuit, is often the shore powe
  10. Yes, but I knew it was somewhere. As the standard does not explicitly say it IS retrospective, it is not; http://ldac.org.nz/guidelines/legislation-guidelines-2018-edition/constitutional-issues-and-recognising-rights/chapter-4/part-7/ For those who dont want to follow the link, but are interested, here is the basic stuff. CHAPTER 4 Fundamental constitutional principles and values of New Zealand law This is a single section from Chapter 4. Read the full chapter here. PART 7 The presumption against retrospectivity Legislation should not affect existing rights
  11. OK, any idea where in the electrical regs the same statement (or similar) is made? I've been looking for it....
  12. Agreed MH, it's a RORT! But it's section 1.5; 1.5 COMPLIANCE The requirements of this Standard shall be used in conjunction with, but do not take precedence over, statutory regulations that may apply in any area. Where no requirement is given, good practice shall apply. In a matter of uncertainty, advice should be sought. This Standard applies to new installations, alterations and extensions commenced after its publication date or the date of adoption by the relevant Technical Regulator. It does not apply retrospectively to existing installations, but any repairs or modif
  13. No "might" about it. ETNZ sail and foil package is (currently!) well ahead of Prada....IMO of course!
  14. It can track thru ply a long way. Ideally you need to cut it out as far as it is wet/rotten/soft. Then it must dry before repair. You need a moisture meter to test when it's dry enough, and it can take a long time to properly dry. You can buy a moisture meter (stanley) from bunnings for a reasonable price if you can't borrow one. This is why fixings in or on ply hulls should be drilled oversize, filled with epoxy, cured, then drilled to suit fittings. But usually they are not.....
  15. Ive had a look around, as I replaced the toe rails on IT (Farr Phase 4) with the same ones as a 1220 about 18 months ago. I could not find anything unfortunately. If you do, let me know!
  16. BA's biggest decision now is "window seat or isle?"
  17. Just to be pedantic. Be careful of the "chopping board" solution. Some use them for backing fittings, and they often slowly migrate from the load. depends what they are made from. There are plastics that can do this, semi crystalline engineering thermoplastics, but you need the right one. You'd probably get away with it though!
  18. Ah, cool, so the rig is down. Any hardwood is fine, sounds like KM will find you a bit....
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