How are Auckland Council’s Moorings certificated ?
It appears there is complete ignorance as to the appropriate system to use in the first place & secondly the contractor employed by the Auckland Council doesn’t seem to know how to lay what he’s been given or actually supplied to the Council.
The Harbour master probably thought he might escape liability because there was such an anchor as a single fluked Admiralty or Fisherman type & these he said were used on oil rigs & moorings, so perhaps it wasn’t a broken off fluke which caused the mooring to fail but even that will not be known until he anchor is hoisted off the bottom to check.
This info has been researched today –
1: When single fluked anchors are used on oil rigs for instance, they are tensioned on opposing sides, well bedded down & then checked by divers or some other method.
2: The mooring situation they are used in is a river for instance where the pull is 1 directional & there is no upwards pointing fluke to puncture hulls of other craft if water levels drop.
3: It was entirely inappropriate to use this single fluke anchor in the Auckland Harbour with strong tides & winds in 2 directions with nothing to stop the anchor from being flipped on its back rendering it useless as Bolton found.
4: It was equally inappropriate for the 2 fluked Admiralty or Fisherman to be used in this Auckland Harbour location as Bolton found when Classique wound the mooring chain around the upward projecting fluke, shortening up the rode until there was severe stress on the bow bollard in swells or ferry wakes.
Because of that problem, Bolton had to shift to this mooring.
5: None of these moorings are given IN-POSITION or post-installation inspection. Anchors have failed to embed completely in sand seafloors – it is also strongly dependent on the skill of the contractor – he may not place the anchor on the sea bed correctly.
6: In this case it requires 2 operators – 1 to lower the fluke end on a separate cable ensuring the single fluke is pointing down as the other operator lays the chain away from it, then the anchor must be bedded down & checked in position by a diver.
7: That this method was not followed is as negligent as using the wrong type of anchor in the 1st place.
In the event these moorings were laid back in 2000, the previous Harbourmaster must’ve been responsible for the type of equipment approved. Then it’s likely that the contractor is responsible for the correct deployment & checking as required for certification ?
Bolton would be expected to have protection under the Consumer Guarantee Act that the services provided are up to the specification of a Heavy Duty Mooring rated 100 ton for hurricane force weather or once in a 100 year blow.
An authentic single fluke special purpose anchor.
Note the ring on the Crown end of the shank to lower it by.