CarpeDiem

Naphtha is better and easily obtained from camping/outdoor stores for liquid fuel cookers.

With the one I referred to above, you point your phone it at the anchor and enter the scope length. It uses the phones compass. So I don't need to worry about remembering when dropping the anchor. I generally set it up just before bed. I have to remember to add the length of the boat to my scope cause the phone lives in the stern beside my head

It's Android only. https://slimjimsoftware.co.uk/ You could pick up a dirt cheap Android phone with GPS and have a dedicated hard wired anchor alert console at the nav station. Can't speak for any of the apple apps...

I highly rate this for Android. https://play.google.com/store/apps/details?id=uk.co.slimjimsoftware.anchoralert You can set an exclusion zones, eg if you're worried about swinging into something, a forecast wind shift or a tide change. You can set the anchor distance and direction based on current location. And it can send txt warning messages, although I feel by the time I got a txt and got back to the boat it would all be to late, so haven't tried this feature....

Don't get me wrong, it's definitely possible.... Just pointing out a benefit of NZ registration in the current climate. It might or might not be enough to justify it for you. And there is no guarantee that this or something else similar could not occur again for other reasons in 10yrs time... The Government has been quite kind to permanent residents that are not citizens, there is no guarantee or right of return for a permanent resident, only citizens have that privilege. I always tell people to get citizenship in any country where you become entitled to it because you just never

Current border restrictions apply to foreign flagged vessels. Yes, you can get in, but you have to jump through a whole lot of hoops. So right now, even if all crew are "New Zealanders" on a foreign flagged ship, you have to jump through hoops and get approval for the vessel. NB: New Zealander is defined as a citizen or anyone with a residency visa. It excludes Australians who are not normally resident in NZ. Where as NZ fagged vessels... There is a very clear benefit to being a NZ registered vessel in the current world.

Our rudder came out for a quick inspection. Was supposed to take an hour. 6 hours to get the damn thing out with pullers and gas torches 3 days to repair a tiny crack at the top that we had no idea existed 3 hrs to put it back in Elapsed time was 5 days of hard stand fees... ^^ this

So the boat is already in NZ and has had all import duties paid? There are downsides but as always it depends on your circumstances/appetite for risk. Eg, right now a foreign flagged vessel cannot enter NZ without jumping through lots of hoops and even then approval will likely not be granted. That's possibly one of the entitlements that maybe "doesn't mean much too you"... We don't live in the same world we lived in 2 years ago. Citizenship and sovereignty have actually come to really mean something since Covid began.

GNS Press Release... DART network proves invaluable in assessing tsunami threat

The tsunami generating eruption occurred at 5:20pm - the first DART buoy (NZG) reported in at 5.48pm that something was happening. Buoy NZG is the closest to the Tonga Volcano and it is operational. NZH and NZI will both be north of the Volcano and are not yet operational. NZH will be about as far away as NZG when it is deployed. There was no delay on the technology side of the equation - everything worked as expected - any delay between 5:48pm and 8:15pm, when the Advisory was issued was human's trying to interpret the data and figure out wtf it all meant.

Radio signals, including Satellite and SSB/HAM frequencies are massively unreliable through volcanic ash cloud due to the electrical charge in the cloud. NZ has 4 undersea cables, 2 on the east coast, Takapuna and Mangawhai, 2 on the west coast, Whenuapai and Raglan. None of them could independently carry all of NZ's traffic requirements. They are all privately owned and managed. As a country we're 100% reliant on the North Island and private enterprise to keep us connected. Two new cables are planned, one out of Takapuna and one out of Invercargill. In a natural disaster not

The dust cloud is interfering with backup satellite communications. Given we've had reports from the NZ High Commission and the occasional picture/news report, the country isn't completely cut off from the rest of the world. Just the general population is...

Someone said the shockwave was moving at 900km/h. If that's the case then GNS picked the threat up and alerted NEMA when it was over 1500km away. So something clearly worked...

What did you see exactly? What was the source of the information? GNS and NEMA first issued official advice at 8.14pm. That was the first official notification in NZ. There is no record of any other notifications prior to this. 1h15m later Tutes was rolled. NEMA were very clear from the first announcement that there was no flooding threat to land. They only send TXT alerts if land evacuations are recommended.

We have a shunt/monitor combination. Newer versions are Bluetooth only or Bluetooth and display. Records current in/out capacity used in amps... Eg https://victronenergy.co.nz/products/smartshunt-500a-50mv?_pos=2&_sid=a4b06e885&_ss=r https://victronenergy.co.nz/products/battery-monitor-bmv-712-smart?_pos=2&_sid=5b69887d0&_ss=r https://hardkorr.com/au/product/remote-battery-monitor-with-high-precision-100v-500a-shunt/ https://www.burnsco.co.nz/battery-monitor-500a-renogy

https://en.m.wikipedia.org/wiki/Jarle_Andhøy

You've quoted NZ532. I can only assume your screenshot above is also from NZ532? If you take a look at NZ5324, which has more detail for Sunday Rock. You'll see it has a 2.7m in exactly the same place as Navionics. To reiterate, the reason Navionics says 2.7m is because that's what the LINZ chart says. Screenshots of each below.

Your paper chart is out of date. Get the latest from NZ5324 from LINZ. But that's kind of irrelevant to your question, you asked... why Navionics says 2.7m the answer is because that's what the latest LINZ chart says Navionics "chart view" uses the same base information as the LINZ charts. So based on your local knowledge the LINZ charts are wrong.

The numbers on my tablet screen detected by my transducer always are a minimum. So somehow it is deducting tide height from it. Eg, if I come into a bay at high tide with 6.5m of water depth, the navionics app shows 4.5m. (assuming a 2m tide) If I sit at the same place for the next 6 hours, low tide, Navionics still reports 4.5m... So somehow it is doing the maths. Not clear if it's the zeus plotter or the tablet/app doing the maths. I don't know how it works in the backend...

Because that's what's on the LINZ chart NZ5324. If you think this is wrong you could discuss it with LINZ. Sure you're talking about the same Sunday Rock? You can turn off the publicly provided information. Up to you. You can also edit them and even delete them.

It adds them. The transducer offset is part of the nmea stream and is taken into account. My depth sounder was showing around 2.2 - 2.5m iirc. The offset is 2.3m. A risk would be faulty tranducers. I suspect that they mitigate this by using multiple readings from different sounders/vessels. It is not clear how they pull the data together for public consumption but I suspect they err on the side of caution... I have never found the sonar depths to be less than the chart datum or less than the actual depth.

What do you mean 'no datum reference'? The numbers shown are what navionics has recorded from my depth sounder taking into account the tidal information and the transducer offset.

The navionics sonar is crowd sourced and approximated, at 500mm intervals there isn't any certified more accurate plot. LINZ does not even come close. The navionics plot will record your depth across your track when connected to your boats sonar. What do you mean offset for tide height? The contours displayed are LAT. Here is our 24hr plot swinging around at anchor in Kirita Bay. Eventually this will find its way into the navionics crowd sourced data and be available to everyone.

I would be interested to see any examples of this? I thought Navionics used the same dataset as the printed charts.

My first son was killed in a Motorcross accident last Monday at a bike park in the Waikato. He has been a part of my life for 25yrs since he was a 2yo. Some of you may have raced against him when he occasionally crewed on various boats with me. Sailing wasn't his passion, but he gave it a go... He leaves behind his fiancée who is 6 months pregnant. Anyway, I am getting outside my comfort zone here to share his give-a-little page set up by one of his close friends. Anything helps. https://givealittle.co.nz/cause/in-memory-of-jaiden Thanks Rowan / Carpe Diem