Greta Thunberg is crossing the Atlantic on Vagabond.

Status
Not open for further replies.
cherod said:
I think I saw this on cruisers forum the other day , got a fairly positive reception there , was quite pleasing in amongst some of the regulars being particularly spite full and derogatory about Vagy , there is a bit of stuff around if someone is prepared to dig , but nothing showing daily miles which yours has ( unless one is prepared to log position and calculate long / lat numbers ) , thanks , Bon voyage Vagy
Click to expand...

Oh - eer, It's just been featured on Front Page Live - a newish but major US news outlet. The hits are going nuts. I did this for a bit of fun and for a good cause - but's a bit of a complex thing to put out as my first blog post. I've now got to keep it running and updated every hour for the next 7 days - I'll be getting less sleep than Nikki Henederson.
 
cherod said:
I think I saw this on cruisers forum the other day , got a fairly positive reception there , was quite pleasing in amongst some of the regulars being particularly spite full and derogatory about Vagy , there is a bit of stuff around if someone is prepared to dig , but nothing showing daily miles which yours has ( unless one is prepared to log position and calculate long / lat numbers ) , thanks , Bon voyage Vagy
Click to expand...

I did post it on Cruisers Forum as well as just Facebook and here so far. Polite positive reponse from Cruisers, but a bit muted - but I did post it slap bang in the middle of a 4 page vitriolic to-and-thro as you alluded to. Performance, routing etc of La Vagabonde was being sporadically discussed prior to that, but we don't have access to the onboard instruments, logs etc - so that was partly why I did it. Only one person commented on the actual perf stats. However they are plenty of sailor-types on facebook who are interested - including a few nit-pickers. It seems to be the business-types with an evironmental leaning who really like it - probably because I used "Business Intelligence" software to suck the data out of the lat/long pairs. I might get some work out of it in my old age - which wasn't the intention :p
 
sebbiep1 said:
There's quite a few following the crossing, including some sailing forums, but other than the basic Predict-Wind tracker, there was not much information for them to look at and the mainstream media is only covering the departure and arrival and seem to be ignoring the drama in the middle. Using La Vagabonde's live json link as input and quite a bit of maths, I've put together some software that squeezes quite a lot of performance information / analysis out of what is basically just a big stream of lat/long co-ordinates. I put it up yesterday on Facebook - my first time at 59 yrs old of using social media - quite likely also the last time. Just over 1,000 users so far in 49 countries since yesterday afternoon. Here is the link to my freshly minted blog with the one post - i.e. the app. https://www.oceanshepherd.co.uk/ If nothing else I think get the record for the shortest lifespan app - it has no use to anyone in around 7 days. And also the record for the most analysis possible from a pair of lat/long co-ordinates.:D
Click to expand...

Power BI - Using data to generate overhead you never knew you had! Thats a joke. I have started using this to track stuff that exists across multiple databases, remarkably powerful and easy but very capable of swamping people with data that is really of no use to the business of profit.

However, your stuff is great, I am thinking of YB Tracker. It would be straight forward to log the data and Power BI to display it in a relevant graphical way.
 
Agreed - my business (and especially IT) philosophy was Simple, Integrated and Standard - and of course, moderately priced. It was mind-blowing working with some really large companies generating mountains of random expensive c**p for no purpose at all. But this wasn't business - just a bit of fun for a couple of days. And it does the job. There were plenty of people (including sailing forums) discussing the La Vagabonde crossing, but clearly there was no real perfmance data or ETAs on the web. So that's what I did - and.... then had a bit of fun to make it look pretty etc, and.... then had to add more to explain it to non-sailors, and.... then had to add more to satisfy the navigation nit-pickers, and then..... had to add more........ Oh dear - what should have been a simple idea is now my lifes work for the next 6 or 7 days.
 
sebbiep1 said:
Using La Vagabonde's live json link as input and quite a bit of maths, I've put together some software that squeezes quite a lot of performance information / analysis out of what is basically just a big stream of lat/long co-ordinates.
Click to expand...
Thanks for assembling this analysis.

Could you explain the formula that generates the projected days left? I ask because some days it appears stuck at a fixed decimal figure even when La Vag records a much faster day.
 
Hello,

Is it the "Estimated Days Left" single figure shown on the dashboard page? If so there could be a few reasons why it looks stuck, so starting with the simplest:

1. I route the La Vagabonde basic GPS sat data direct and automatically to the Microsoft datacentre where this database is located. All of the other data is calculated - mostly automatically on Microsoft's servers, but there were a few things that were too hard to automate or would have taken me too long, given that this app only has another 5 to 7 days use left. Hence I have to do a few manual data transformation steps. So if am away or sleeping the "Estimated Days Left" won't update until I get back. I think that's the most likely reason. For that reason I've just added 2 displays bang in the centre of the page 2 dashboard that say when both data loads have been done - i.e. the sat link and the maths upload - which may be at different times. That way people can see when it was last updated. They could have looked at the date of the last hourly "log" record on page 1 - but must casual internet users probably wouldn't.

2. A few (4 or 5 I think) times - the boat didn't seem to send the hourly GPS fix - i.e. there are breaks in the data stream. One double gap was right at the "as the crow flies" or great-circle half-way point, when they were all apparently having a vegan "cookie" party. So that would also cause my update to get stuck - but small compared to the pause caused me by having to sleep.

3. Third is the more complex answer about my calculation method, which means that that the Estimated Days Left certainly does sometimes stay the same even if their speed through the water is fast and also has gone backwards on a number of occasions (i.e. a larger days remaining number) as they have changed course for weather routing, safety and comfort etc. I've attached a link to a simple text list of La Vagabondes basic logbook with 356 hourly entries plus a few columns with my time to arrival and it's rate of change + or - in hours. Taking into account the boats SOG and COG at the time the ETA changes all look fine, except in the first few hours as they left the Chesapeake and had a three hour gap in transmission. As I use an unsophisticated automatic integration method to hopefully get quite close to their actual speed sailed through the water on the overall passage, that big gap based on small numbers at the start of the passage skewed my ETA, but fully corrected itself when the steady GPS data came on - so the large ETA change in the first few lines of the text doc is irrelevant.

https://1drv.ms/t/s!ApiLsclNq3bomMwLLK6_wWseFCKfDw?e=hH795S

I think that no.1 is the simple answer - i.e. it's just my update delays. But if after scanning the text file, you think something is amiss, we can dig into the calcs more deeply. I added pop-up boxes last night on pretty much all of the data in the reports. Just hover your mouse over any value or graph ans a large text box will pop-up (they are also repeated on separate pages at the end). These help explain the data to non-sailors and also hopefully answer the sailor's questions I was getting on facebook related to the source or method to get each value. But happy to follow-up in another message as mentioned.

Thanks
Andy
 
capnsensible said:
As they are passing n of the azores and looking at the weather i estimate they will be about 6 days from arrival.....
Click to expand...

They are 720nm from Lisbon, and seem to be doing 10 kts most of the time. This would make 3 days possible and 5 days pretty much certain.

They should be in Lisbon by the 4th, two days after the start of the conference, which is on until the 13th.


- W
 
webcraft said:
They are 720nm from Lisbon, and seem to be doing 10 kts most of the time. This would make 3 days possible and 5 days pretty much certain.

They should be in Lisbon by the 4th, two days after the start of the conference, which is on until the 13th.


- W
Click to expand...
It is going to be great watching this , will she be entering Lisbon an a donkey with her followers lining the street , that would be fantastic !!!
 
Defaut polar (whatever boat that is !) in opencpn weather routing plugin has eta afternoon of the 3rd.

EI99lZY.png
 
cherod said:
It is going to be great watching this , will she be entering Lisbon an a donkey with her followers lining the street , that would be fantastic !!!
Click to expand...

Just like Jesus, who entered Jerusalem on a donkey. Is this the return of the Messiah?
 
Zing said:
Just like Jesus, who entered Jerusalem on a donkey. Is this the return of the Messiah?
Click to expand...

Except it is a catamaran not a donkey, Lisbon not Jerusalem, climate change is scientific fact, not a religion and Greta wants to save us from ourselves, not from the wrath of her father.

Simile not your strong suit is it?

- W
 
sebbiep1 said:
I think that no.1 is the simple answer - i.e. it's just my update delays.
Click to expand...
The simplest theory is usually the best.

I enjoyed reading the rest of the background systems info. I assume this is running on the Microsoft Azure cloud? I hope your site's hosting can remain in the free usage tier despite the publicity.
 
Status
Not open for further replies.

Share this page

Top