I am not sure what type or format of files are available from Predict Wind, but Expedition will show any of the files mentioned in this video, and indeed any standard grib format. Once you have the file with extension grb or grb2 then just copy that file to the Gribs folder in the Expedition data folder found under c:/program data/expedition. Then on the Wx data tab, click settings top left and you should see your file, and if not checked, add a check mark to it, and that will automatically show the file... but you must have the screen set up to cover the region of the data as i do not think it finds it for you. The same is pretty much true for qtVlm. If it is a valid grib, it will load and display.

You are not missing anything... other than the terrestrial charting you note. This is not good at the moment in NOAA ENC, and they know that and they will fix it. In the end, the land coverage will be better in the ENC (and NCC) than it is in traditional paper charts. We show that can be true because in qtVlm you can right now add elevation contours with a spacing of your choice, and also add roads and buildings on your own. We have videos on the process. It is done via shape files. See davidburchnavigation.blogspot.com/2021/12/adding-elevation-contours-to-qtvlm.html which has a link to a video. For the moment, NOAA is busy with the rescheming project which is a major overall to the size, shape, and scales of all ENC. I think it is fair to think of that as having higher priority; then they will add the land features. See www.nauticalcharts.noaa.gov/publications/docs/enc-design-handbook.pdf As for chart notes, in qtVlm you can turn on "Highlight objects with extra information" and it will show which items you can click to read notes about. ENC include all the notes that were on the paper charts, they are just not so prominent.

Thanks very much. We have one of these. They are about three times the size of the 2102-D and a good antique find for mariners. Ours dates from1920!

@@StarpathNav: I think that's the first year it was made.

@@StarpathNav: A really great device. I like it as much as a celestial globe. They're great, too.

There are free inland ENC (IENC) for all EU nations that cover all the rivers and some coastal waters near river basins, but otherwise all global nations except US and New Zealand charge for their ENC. There are packaged ENC options for specific nav apps (ECS) such as Meltemus charts for qtVlm or O-charts for OpenCPN and these are much discounted prices, but they only work on those specific apps.

@@StarpathNav Thanks for your quick feedback

Thank you. We very much appreciate the report.

Thanks very much. That is a great plug in; also lets us get historic or future data in an easier way. I am running the Mac version, and gave up too soon! It seems you need to find (unpack the app folder) and then duplicate the harmonics files to another location and then reassign to new location... or maybe i am missing something, Then the only snag i see is, it seems my Mac ver does not respond to the arrow size control, so i am left with very small arrows. I am still working on that. Just checked the PC version and it works great there! No snags. Thanks again. I should have checked the PC version first.

You might try Paypal, which often works in such cases... or write to [email protected] if that does not work and we can send a custom invoice.

It is a resource available to Starpath students and other webcard holders at www.starpath.com/cgi-bin/web_card/library/library.pl?p=active&sec=Practice%20problems Our webcard program is discussed at www.starpath.com/webcards.htm

@@StarpathNav Thanks for your response.

@@TKC-CeleNav Glad to. You are welcome to contact us at [email protected] for further information.

It is in the Cheat Sheet ( https:www.starpath.com/qtVlm ), or direct at www.starpath.com/qtVlm/qtVlm_toolbar.pdf

@@StarpathNav thank you

Thanks very much.

Sorry. It is the one called "Stan Klein's CelestialTools (PC program)"

The great circle is the direction to the target, but beyond that i do not know the answer to your question.

@@StarpathNav I guess I should rephrase my question. If one is taking the great circles initial heading will he reach the target without having to steer? The reason I’m asking is because in the example I provided , the great circle has an initial heading of NE. If you were to continue walking from that initial heading (now throw your compass away at this point) without steering, you would end up in Ireland if coming from Toronto. Even in perfect conditions(air traffic , wind etc) , planes have to steer right to go to a target that is south of the initial location.

@@aklearns544 No. to follow a GC route requires constant heading changes to keep you "pointed toward the mark." On a RL course you get there without steering (ie constant heading), but only as you approach the destination at the end are you actually pointed toward the mark.

If you have the newer MI processor use ARM, else use Intel. There are some notes on this here: apptimized.com/en/news/mac-packaging-with-apptimized/ Also, i think when you install the wrong one, qtVlm tells you. It will not hurt anything.

@@StarpathNavThanks David for your quick response 👍 I´m trying to get togehter a group of sailors, here in Europe, esp. Holland and Germoney, which are interested/using qtVLM. And of course there are some Mac-users among them - so it`s fine I can help them out 👍. This networking is great, thanks again for your help and efforts. Cheers, Rudolf

Gld to help. We also have an online course on the use of qtVlm and extended electronic chart nav. See course description at www.starpath.com/catalog/courses/1926.htm The ENC rules are international, so knowledge covers all nations. @@rudirednose1903

Sorry i missed the comment. I will check that.

Most or many books on cel nav or ocean sailing do a great circle computation using a spherical earth of a specific radius that leads to 1' of Lat = 1 nmi. ie it is assumed that the circumference of the earth is 360 x 60 mi and from c = 2 pi R you find that radius. But the earth is more an oblate spheroid, ie beach ball compressed down a bit at the poles. In this real earth the intersection of plane and earth through the center is not a circle in general. So that is the detail hinted at. I am working on a short video to illustrate this and explain a common compromise solution. Thanks for noting this.

I would also like this I will be in the med in Jan 2024

Sorry for the delay. i missed the notice. yes there are several models for waves and current forecasts in the med. see them described at www.luckgribcom/models also see opengribs.org/

Sorry for the delay. i missed the notice. yes there are several models for waves and current forecasts in the med. see them described at www.luckgribcom/models also see opengribs.org/

@@StarpathNav thanks a lot dear Dr David for the reply 🙂, I will check website and keep in touch with you... I think your visit to the Mediterranean sea will be delayed because of the Gaza war, please let me know if you are still in schedule, best regards

That phone does have a barometer sensor, so it should work. Maybe try again, and if not please let us know what it tells you. thanks,

We have an article on most likely position from 3 LOPs, and you could approximate the arcs to lines to apply it. See davidburchnavigation.blogspot.com/2016/07/most-likely-position-from-3-lops.html

We have tried to note if there is batch effect... but likely not. On Amazon you can only buy 3 at a time, and if we place two orders, they come from different sources. We have on going notes on this process and this watch that you might find valuable: davidburchnavigation.blogspot.com/2018/07/finding-watch-rate.html

qtVlm does not accept N2k directly, but all N2k systems offer a relatively inexpensive (~$180) gateway that converts the signals to NMEA0183. These can be via a USB cable or wireless.

To compare Hc with a manual solution we must use the assumed position for input, not the DR position. This is a common source of discrepancy.

@@StarpathNav thank you yes, I figured that part out and do use the assumed longitude and the AP Lat.

sun height rising is before noon; sun height diminishing is after noon. Mid to later 1700s was mostly lunar distance.

@@StarpathNav yes, but I assume right around noon the movement of the sun is barely perceptible. And as a few minutes can already change your calculated position by many miles, I wonder how they found noon itself accurately. Or did they draw a graph on paper with a lot of measurements taken right around noon and the time indicated by one clock, and later determined the point of noon with the help of that graph?

Yes you can, using a bluetooth GPS.

Doable if time permitted. In the meantime, you can see extensive reports by saying moving the boat to the mouth of the Thames and then right click and show station reports. Likewise can request near live reports the same way.

The tide and current functions do not require being online.

I am not familiar with web map services, but ENC is a standard chart format and readily available for all US waters at no charge and viewable in. many apps.

We used a calibrated tipping cup rain gauge to confirm the rate, then drove off.

Excellent!