Would love to see how to load some alternative GRIB files into Expedition! I tried exporting the SPIRE and UKMO from PredictWind Offshore (I have the subscription) and Expedition wouldn’t read them… Not sure if QTVLM is the same
@StarpathNav4 күн бұрын
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.
@paulbennett774315 күн бұрын
thanks, great stuff!
@robinj.932918 күн бұрын
I just ordered my second "Starfinder" off amazon. Their up to $92. these days. BUT STILL well worth having aboard ! And in certain areas of the World's Oceans, GPS isn't always reliable. Potentially "Enemies" of the U.S. are constantly monkeying around with ways to disrupt reception OR trying to jam/scramble the signals! Remember: those satellites are pretty far away. So the signal strength down here on the ground are pretty weak. We really still need LORAN as a reliable "backup" !!!!!
@stewartputnam907719 күн бұрын
I've downloaded enc to my opencpn and qtVlm on Android and Linux, and I find a lack of land detail: elevation lines, roads, landmarks, terrain notes. For instance, if I zoom in on Lummi Island and the steep slopes around Baker Reservoir, and flip between raster and vector charts ( either by chart selection header bar buttons or en/dis abling chart folders in settings ) I'm aghast at the loss of land detail in enc mode. Am I missing some settings or is the land detail simply not there in enc? Thanks
@StarpathNav19 күн бұрын
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.
@georgelewisray19 күн бұрын
Thanks So Much for your VISION and the ENERGY you apply to that vision . . . .
@markprange243022 күн бұрын
An early (2102 A model) Rude Star Finder is $75 at eBay.
@StarpathNav22 күн бұрын
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!
@markprange243022 күн бұрын
@@StarpathNav: I think that's the first year it was made.
@markprange243022 күн бұрын
@@StarpathNav: A really great device. I like it as much as a celestial globe. They're great, too.
@sofianeaboutite29 күн бұрын
Is there any free equivalent ENC for europe ?
@StarpathNav29 күн бұрын
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.
@sofianeaboutite29 күн бұрын
@@StarpathNav Thanks for your quick feedback
@Jim-ci5qrАй бұрын
Hi David, I just purchased the USB barometer and wanted to say thank you for making this product affordable for everyone. I find it to be extremely accurate and I have used it to calibrate my ASI barometer!! Just wanted to say thank you!!
@StarpathNavАй бұрын
Thank you. We very much appreciate the report.
@dougbritton1624Ай бұрын
If you add the otCurrent Plugin, it will do exactly what you seeking. Step through currents every hour or less.
@StarpathNavАй бұрын
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.
@TKC-CeleNav2 ай бұрын
Dear Professor Burch: Today I tried to use a credit card from Taiwan to purchase 12 months of WebCard usage rights, but the system does not accept credit cards issued in Taiwan. How should I purchase them?
@StarpathNav2 ай бұрын
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.
@Cranston02 ай бұрын
Good trick. Never noticed it did that when overlaying a grib.
@rayhsetwo85942 ай бұрын
Thank you for that link, subscribed.
@georgelewisray2 ай бұрын
Thanks yet again for this gift that keeps on giving !!!!
@TKC-CeleNav2 ай бұрын
Dear Professor Burch: How will I obtain the online star finder simulator introduced in your video??
@StarpathNav2 ай бұрын
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
@TKC-CeleNav2 ай бұрын
@@StarpathNav Thanks for your response.
@StarpathNav2 ай бұрын
@@TKC-CeleNav Glad to. You are welcome to contact us at [email protected] for further information.
@skypickle293 ай бұрын
where is the link for the toolbar pdf?
@StarpathNav3 ай бұрын
It is in the Cheat Sheet ( https:www.starpath.com/qtVlm ), or direct at www.starpath.com/qtVlm/qtVlm_toolbar.pdf
@skypickle293 ай бұрын
@@StarpathNav thank you
@southernpaths29863 ай бұрын
Working my way slowly through the Celestial Navigation book now. Your books have been a tremendous help in demystifying cel nav and navigation in general for me. Thank you so much!
@StarpathNav3 ай бұрын
Thanks very much.
@georgelewisray3 ай бұрын
Thanks again for your helpful and important work ……. : )
@margaretpommert4493 ай бұрын
Thanks David!
@mymobile50143 ай бұрын
There's a ton of links there to download, mind telling us which one is the actual celestial tools app?
@StarpathNav3 ай бұрын
Sorry. It is the one called "Stan Klein's CelestialTools (PC program)"
@aklearns5444 ай бұрын
Thank you so much for this video! I have a question! If someone lives in Toronto and they want to Face Mecca… should they pray towards the rhumb line bearing or the great circle route initial bearing?
@StarpathNav4 ай бұрын
The great circle is the direction to the target, but beyond that i do not know the answer to your question.
@aklearns5444 ай бұрын
@@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.
@StarpathNav4 ай бұрын
@@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.
@rudirednose19034 ай бұрын
Hi David, when I want do download for MacOS, which Download for MAc is the right one? The file which ends on ......p1-arm or the file with .......p1-intel? Thanks on forehand, cheers
@StarpathNav4 ай бұрын
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.
@rudirednose19034 ай бұрын
@@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
@StarpathNav4 ай бұрын
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
@user-cu6wx6xc1o5 ай бұрын
Thanks a lot professor David ❤❤❤
@Sailing-Aquaholic5 ай бұрын
At example 5-615 the starting point is in zd-9 and the end point at zd+8. But to get the starting time in UTC you substract 9 hours. And to gey the end time you substract 8. I think there is an error at the starting date.
@StarpathNav5 ай бұрын
Sorry i missed the comment. I will check that.
@whenwasnow60626 ай бұрын
haven´t got the boat yet...learning armchair sailing routing while I make up my mind on what and when to buy. Thanks!
@tazojapharidze71066 ай бұрын
Hello David As i notice u have really big knowledge and after today i am gonna to follow you and watch your every video I tried to find video about sog and stw but i didnt find Could u explain difference? Please tell me which one change due to some reason? Which one use for avoid collision? And why, as short as possible. Thanks in advance
@chrispelon68128 ай бұрын
I am curious what you meant by “we’re assuming spherical earth“.
@StarpathNav8 ай бұрын
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.
@Jim-ei2iv9 ай бұрын
Thanks David for bringing this to our attention! This will be terrific!
@moeagle744510 ай бұрын
Hello dear Dr. David Is there any data and models about the sea currents and waves for the Egyptian Mediterranean sea please 🙏🙏🙏
@westmc4510 ай бұрын
I would also like this I will be in the med in Jan 2024
@StarpathNav9 ай бұрын
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/
@StarpathNav9 ай бұрын
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/
@moeagle74459 ай бұрын
@@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
@flyingthesails6801 Жыл бұрын
Very informative video and well explained. Much appreciated.
@sakuradag4978 Жыл бұрын
Thanks .
@grzesiekmaek5707 Жыл бұрын
Hi, j world like to download to my new Samsung A 54 5G and this is not possible to do, what j niedzielę to do to instal on my Phone?
@StarpathNav Жыл бұрын
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,
@stasasavoidu2255 Жыл бұрын
gosh, you can not fix by buoy!! and in real situation you will NEVER get intersection of all 3 LOP, even the radar ranges. So it would be nice to add a solution for finding EP inside 3 arcs as there is for a triangle of bearing lines (intersection of medians of each angle)
@StarpathNav Жыл бұрын
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
@E12_Sterling Жыл бұрын
David this is a good topic coverage. There are no short cuts and no guessing games.’ Science at work as u said!
@jyohhannes Жыл бұрын
David, the video is great. Thanks a lot. One question though: did you find any pattern on the accuracy differences (1.2 to 0.2) depending on the batches? Was it just a random series of watches and it just happened? In other words, is there a way to make sure you get a model from the "most accurate" batch? :)
@StarpathNav Жыл бұрын
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
@baxternauset Жыл бұрын
Not relted to this subjets but can qtVlm interface with MNEA 2000? I've been told the boat's data needs to be converted to NMEA 0183 to read instrument and GPS location from the backbone.
@StarpathNav Жыл бұрын
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.
@SteveWong-LA Жыл бұрын
Nice. Thank you for the video
@lisarowell454 Жыл бұрын
Thanks for making this, it helped a lot.
@sailinghaldis Жыл бұрын
Just realized that the star pilot is your creation. Nice job. I just finished celestial navigation course and found it quite useful. That program is amazing and complete. There are some times that I can’t get it to match Hc and Zn perfectly despite my best efforts. Is that because of interpolation within the device?
@StarpathNav Жыл бұрын
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.
@sailinghaldis Жыл бұрын
@@StarpathNav thank you yes, I figured that part out and do use the assumed longitude and the AP Lat.
@lutzderlurch7877 Жыл бұрын
I just wonder, how you'd be able to tell if it is noon already or some earlier or later. Also, how would you, in the mid 1700s, go about determin your longitude?
@StarpathNav Жыл бұрын
sun height rising is before noon; sun height diminishing is after noon. Mid to later 1700s was mostly lunar distance.
@lutzderlurch7877 Жыл бұрын
@@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?
@arpandey7043 Жыл бұрын
Accuracy very important
@cemdeniz3431 Жыл бұрын
Can we use on the ıpad?
@StarpathNav Жыл бұрын
Yes you can, using a bluetooth GPS.
@martingifford9486 Жыл бұрын
Hi, thanks, this is very useful. How easy might it be to replace or include the shipping forecast data with the inshore forecast, which is even more valuable? Thanks Martin
@StarpathNav Жыл бұрын
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.
@benjaminhunt3808 Жыл бұрын
Great video! Was really struggling to figure this out and this explained it perfectly.
@xyz3524 Жыл бұрын
0,1 inches ≈ 2,5mm
@charlies7658 Жыл бұрын
Does qtvlm allow you to store the data for periods when you’re offline? ie, how do you access the tide data for an upcoming trip when you’re offline? Great videos as always!
@StarpathNav Жыл бұрын
The tide and current functions do not require being online.
@duncan-mcrae Жыл бұрын
Can you bring in ENC from a WMS through GeoServer?
@StarpathNav Жыл бұрын
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.
@pmammekhail1343 Жыл бұрын
Is this accurate anyone else can verify? Planning outdoor activity and this seems ok but I have seen other .1 inch rain videos that was pouring 🤯
@StarpathNav Жыл бұрын
We used a calibrated tipping cup rain gauge to confirm the rate, then drove off.
@LeighWilliamatgoogle Жыл бұрын
Does anyone know of a similar app for android?
@slpttr0 Жыл бұрын
Thanks it helps so much
@BlackheartCharlie Жыл бұрын
Thank you for taking the time to make this video! Your advice to get the CoolTerm app was spot-on. This app enabled me to diagnose the GPS dongle I bought and make it work with OpenCPN. Best regards from Key West, Capt. Blackheart Charlie s/v Aurora