Vigo - Plymouth

Using climatic data routing from the pilot charts data for April, these two routes come out.

The one with the white boxes is computed minimizing passage time AND percentage of gales
The one with the green boxes is computed minimizing passage time ONLY...)

That's very interesting, do you know what the units are of the numbers plotted? Can't be days as the boxes are numbered 0 to 14. A Rustler 42 should do that passage in ~4 1/2 days.
 
I would imagine that even an Albin Vega could go to windward somewhat better than a Spanish galleon.... ;)

BUT NOT, astern
attachment-1_zps1bd4f78d.gif
 
That's very interesting, do you know what the units are of the numbers plotted? Can't be days as the boxes are numbered 0 to 14. A Rustler 42 should do that passage in ~4 1/2 days.

Yes you are right they are not "days", the program (Virtual Passage Planner or Visual Passage Planner I'll check) asks to choose the number of intermediate waypoints (can be one two twenty...), then choose if one wants to minimize/maximize any 1 or 2 variables among: passage time, gales, atmo pressure -not sure what this is for-, wind speed, significant wave height, etc.
Given the polars of the boat, it runs a user-defined number of simulations and outputs the number of waypoints. I think the WP are placed with equal spacing on the rhumb line, then moved perpendicularly with the various simulations.

I happened to have 14 as number of WP, I tried with 5-6 waypoints and indeed there are no big differences in the general shape of the routes.

It's a nice software, though often results are not that straightforward to interpret


I checked the name is Visual Passage Planner.
 
Late March/Early April.

Passage plan:
Leave Vigo & head West until 12 deg W (about 180 Nm)
Then head North for about 80 Nm, then 137 deg (T) for Bishop Rock (300 Nm).
From there, head 070 deg (T) for Plymouth.
Refuge Ports (1) Iberian Peninsular (2) Cornwall.

Discuss.

Match reportedly abandoned after leaving & returning to Vigo, due to water ingress, found to be a broken engine cooling water seacock + faulty steering system.
 
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