Vendee Globe 2020
- Thread starter bigrpowr
- Start date
J_Grove
Member
When plotting courses for these boats, do the navigator(s) take the eddies of the ACC into account? Would seem that 1-2 knot current is a non-factor when the wind is blowing 30-40 knots, but maybe at low wind speeds?
Hitchhiker
Hoopy Frood
Been gone for several days, Two days of futile racing in light to zero winds followed up two and half days of work. All of which conspire to interfere with my hacknavigation.
Two things I notice. The update rankings seem to nearly always state a dubious boat heading. The numbers posted below are based on four hourly updates of lat/lon to lat/lon so averaged out (except 2100 to 0400). Not sure how the vendee are calculating the headings.
Second is that Louis Burton is going to be very busy over the next 12 hours or so!
Two things I notice. The update rankings seem to nearly always state a dubious boat heading. The numbers posted below are based on four hourly updates of lat/lon to lat/lon so averaged out (except 2100 to 0400). Not sure how the vendee are calculating the headings.
Second is that Louis Burton is going to be very busy over the next 12 hours or so!
bucc5062
Super Anarchist
I am loving the tenacity of this sailor. She is making smart decisions, pushing her comfort zone and now is hanging, if not eating away at at those ahead. If she can keep it all together past this seemingly confused section of ocean I could see her start to slowly move up again. It is not a sprint and she gets it.
As to that breakfast...not so sure.
Right now from what I gather the head is trying to get through the hellish conditions (strong squals, big nasty crossed seas) the indian ocean is throwing at them, without breaking the boat or themselves... intense.
Edit: In very low wind speeds / lulls I'd think they take everything into account
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cortosam
Member
My favorite woman on this Vendée, no mannerism alla Clarisse, just perfect sailing, quietness and boldness as well
cortosam
Member
Too bad Caudrelier has never had the opportunity to set a proper Vendée Globe project, but good for the Ocean race
was interesting the insights he gave on the first victory by Cammas on the Volvo on how some sailors of Groupama team mistrust Franck Cammas and didnt want to obey him meanwhile he was the skipper and by far a better sailor than anybody else in every aspects of the sailing.
TheDragon
Super Anarchist
Beyou has caught the backmarkers, but is struggling to pass them, surely should be significantly faster in basically the same conditions.
jack_sparrow
Super Anarchist
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jack_sparrow
Super Anarchist
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That's a free ride of 5 - 10% boatspeed at 20k and not against the wind so better sea state.
jack_sparrow
Super Anarchist
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This one uninhabited ahead St Paul and looks inviting for a rest and fix things....it's not.
Think water depth at entrance at a craters 'edge' and when inside water depth 'inside' a crater.
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J_Grove
Member
Yes knowing how they must try to squeeze every bit of speed out it seems reasonable even if of very secondary importance to wind. But listening to race reports, reading Herman's and other posts, etc never heard/saw it mentioned. The data from altimeters that measures the SSH may be up to a few days old depending on position relative to satellite ground track and orbit, but there's numerical ocean models that constantly assimilate this data and update surface current ocean product. I would think these teams with high dollar budgets would be tapping into something like that.
Liquid
NFLTG
Liquid
NFLTG
jack_sparrow
Super Anarchist
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Not high end. All routing programs can accommodate current or tide data and it's importance depends on postcode.
It's is also computed in the navigators head as they do twice daily for wind models versus their metrologic thinking and from what they see looking out the window and at their barometer.
The Southern Ocean where current largely follows the prevailing winds generally less so for routing other than say areas of short term extreme wind where the two may run counter to each other, so a place to avoid for sea state reasons as I noted. Micro decisions on current guided more by real time data derived on board ie. COG and SOG versus BS and Magnetic Course than a current model.
Sitting on current or the magic carpet say lift you towards a weather target WP down the track for free and still be maxing out polars through the water is worth its weight in gold.
The reason it is not mentioned by those running routing programs here is they probably don't have a current/tide model loaded and certainly don't have access to real time data.
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Varan
Super Anarchist
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I liked "Caudrelier has found it fascinating watching the race unfold and how well the older boats have done while many of the newest foilers have had trouble. He makes a very interesting point, that this Vendée Globe is underlining that the nature of the sailor on board is generally more important in terms of performance than the nature of the boat he or she is sailing."
jack_sparrow
Super Anarchist
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That fuckwit Pieter Heerema in last edition with an expensive & rare new foiler proved that.
He blamed everything except himself. He had B&G being shit instruments before Les Sables had disappeared over the horizon behind him.
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terrafirma
Super Anarchist
Yeah I have been watching that. Jeremie has been really slow in comparison to the boats ahead of him. I wonder if Jeremie believes he is just going through the motions? The question of how many boats he can pass at around 30% of the race is really up to him?
PIL66 - XL2
Super Anarchist
yeah i sort of questioned and as it now turns out, that north move was not profitable ... hind sight is great
