wheels 543 Posted September 1, 2017 Share Posted September 1, 2017 Late last year and into early this year, the NIWA boat had been surveying the Sounds. They spent 8 months and covered 40,000 hectares of Sea Floor and recorded 30 Terabytes of Data. Interestingly, they have discovered quite a number of wrecks. Some known and some unknown. One is really interesting to me, because it could well be my friends Yacht that went missing several years back now. The data has shown a Sailboat out from Waikawa and the top of the mast is at 40m down. Too deep for Police to dive to apparently.https://www.stuff.co.nz/national/96315270/add-them-to-the-list-underwater-survey-discovers-new-wrecks-in-marlborough-sounds Quote Link to post Share on other sites
erice 732 Posted September 1, 2017 Share Posted September 1, 2017 if they don't have access to a remote submersible they should have Quote Link to post Share on other sites
Island Time 1,234 Posted September 1, 2017 Share Posted September 1, 2017 Yep, 40m is the RECREATIONAL dive limit - or was when I did my PADI training. Not that hard for anyone certified in Mixed gas diving. Quote Link to post Share on other sites
cj! 19 Posted September 1, 2017 Share Posted September 1, 2017 40m is fine on air if you know what you're doing. Mixed gas would be better but not necessary for a quick inspection but I understand their need to follow strict rules, it keeps them safe. Worst job I ever did was a salvage on a boat that went down with a family on it. Never want to dive where bodies are involved ever again, having grieving relatives around only made it worse. The police divers earn their money. Quote Link to post Share on other sites
Island Time 1,234 Posted September 1, 2017 Share Posted September 1, 2017 Yep, I don't dispute that. I don't envy their job at all... Quote Link to post Share on other sites
wheels 543 Posted September 1, 2017 Author Share Posted September 1, 2017 I would hate being a Police diver. And especially when they are working in filthy water that has no vis and they are working by feel only.But yes, both Police and Navy have very limited depth they can dive to. I had always thought Navy would have specialist diving to deeper that normal depths, but no, they are the shallowest of the lot.NIWA does have a submersible camera apparently.When all the Data of the survey has been sorted, it will be available to the Council. I would love to see the charts produced, but I imagine that the Council will likely charge a horrendous fee for the information. Quote Link to post Share on other sites
cj! 19 Posted September 1, 2017 Share Posted September 1, 2017 I was having a look at NIWA's bathymetry section the other day. Big file sizes. https://www.niwa.co.nz/our-science/oceans/bathymetry Quote Link to post Share on other sites
grant 40 Posted September 2, 2017 Share Posted September 2, 2017 the charts will be produced by LINZ as usual, there was a joint approach by LINZ and Marlborough District Council that meant LINZ surveyed the entire sound and not just bits important to shipping and MDC get a heap of other data about the sounds at a really good price. Most councils tend to make their data available where they can. It might take a while to chew through the data and make it something more easily digested. Quote Link to post Share on other sites
Pelagic Mountie 4 Posted September 6, 2017 Share Posted September 6, 2017 The survey was a joint effort between NIWA and specialist Hydrographic Survey company Discovery Marine Ltd. (DML). Funded by LINZ and MDC. Yes, there's a lot of data to get through. Quote Link to post Share on other sites
raz88 96 Posted September 7, 2017 Share Posted September 7, 2017 I guess also if the top of the mast is at 40m, depending on how its lying and the size of the rig the boat could be another 10-20m down? Quote Link to post Share on other sites
wheels 543 Posted September 7, 2017 Author Share Posted September 7, 2017 I think it was a Cav of about the 10m size. Quote Link to post Share on other sites
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