La Vagabonde / Greta Thunberg – Tracker & Voyage Stats

Find Greta’s arrival time in Portugal / Spain.

Important – select full screen mode for smooth interactive performance (bottom-right double headed arrow). Click centre of < 2 of 15 > for Page Menu

Thousands across the world are following La Vagabonde’s current voyage across the Atlantic Ocean in Winter. Even experienced sailors who don’t normally get excited about a Transat are following it keenly and debating the weather routing strategy and the safety risks etc. La Vagabonde has experienced very rough weather for the first half of the crossing, including narrowly avoiding tropical storm Sebastien – which is now on its way to me in the UK. However, both La Vagabonde and her crew are strong and able and appear to have held up well against the challenging conditions.

There are three very interesting parties in the crew of 5.5 (including baby Lenny). There’s Greta Thunberg, of course, and her father Svante. The rest of the crew include the world’s most popular sailing vloggers, Aussies Riley, the skipper, and partner Elayna who sail and live on the yacht with their son Lenny. Last but not least a young English record-breaking professional yachtswoman – Nikki Henderson, also stepped up for the challenge. All three parties have achieved a huge amount at quite a young age and are acknowledged leaders in their respective fields – so it’s a fascinating impromptu team that formed a few weeks ago. Greta certainly knows how to find good talent – the mark of a great leader.

Lots of sailors and landlubbers are following the La Vagabonde tracker which basically gives the current position and track with very little extra information. Folks online have been asking “how far left to go?” and sailors have been trying to get glimpses into the performance of the boat during the crossing etc. Also a few have asked if anyone is recording the GPS data for the whole voyage because it would be interesting to “play-back” later.

So, in homage to Greta, who is a self-confessed data-junkie and science-geek, I’ve analysed the raw satellite GPS data with some nifty great-circle spherical trigonometry calculations to create a detailed log of the whole voyage.

The app has three pages of detailed information, selections and changes you make on one page will filter through to the other two pages.

Page 1: A detailed hourly log of the entire voyage. You can scroll up and down and click on dates or hours.

Page 2: A Dashboard with some interesting analysis and stats. Lots of daily averages and trends and most importantly a constantly updated estimate of the time of arrival in Europe – presumably Lisbon, Portugal.

Page 3: My home-made map route tracker showing much more information than the official tracker. Hover the mouse over the track bubbles to see the pop-up data.

Tips on moving around the app:

The app is very interactive – clicking on one part will automatically change all of the other displays and pages. Try clicking on dates, hours, parts of the graphs or the tables etc. Click on the table column headings to sort the tables in any order.

There is a lot of information, so depending on your device’s screen size, it might be hard to read. So, each table and graph have a “focus mode” (in the top right) to temporarily enlarge that section. On the bottom bar of each page, I’ve also added a full screen mode.

Here is is the direct link to the app. Power BI direct link It bypasses this blog and goes direct to my Power BI service which is run in Microsoft’s datacentres – so it’s a faster connection and also the data updates around 1 hour sooner. This direct link can also be better optimised for viewing on a phone – I’ll modify the app to do this in the next few hours.

I hope that, like me, you enjoy using this app to track Greta and La Vagabonde’s progress.

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