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Bonjour,

je souhaiterai avoir des informations sur la technique pour avoir une TWA en .0 comme arrive à le faire certains.

Selon le Dashboard, je suis toujours en décimale, donc des écarts infimes se forment sur les autres données, notamment la direction prise et la vitesse.

Merci de vos éclaircissements.

Laurent.

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  • 9 months later...

Bonjour,

Après quelques années de non navigation, je suis de retour pour revivre aux joies de la navigation. Je suis à la barre du Alex.T sur la Magellan 11. 

J'aimerai savoir comment ce problème a été résolu de navigation .0 .. 

Le lien ne fonctionne plus... 

Merci à vous, 

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  • 2 months later...

Tu te met à la Twa choisie. Tu regarde ton dashboard pour voir si tu est en dessous  ou au dessus de la valeur choisie. Si tu es au dessus .,tu ouvres ton cadenas pendant 1 mn ou 2 en fonction de l angle a rattraper et tu refermer le cadenas et tu attends de voir au bout de 5mn le rafraîchissement du dasboard et ainsi de suite jusqu a arriver à twa xxx.00

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  • 3 months later...

There is a better method to get an exactly desired TWA.

First, Why?  If you look at the polar charts, there are peaks and valleys. You never want to sail at an angle that is in a valley, usually when you are in between two sails. Just like real sailing. Conversely, if there is a peak (like at max boat speed angle), then you definitely want to be exactly on that number. Being 0.2 off doesn't sound like much, but if you are ever wondering how the top sailors will slowly pull away from you, that's why.

The method involves using a programmation point.  First set your boat as close as you can to the desired TWA. Check Dashboard and see what your TWA is to the 0.1 degrees. If it's not precise, set a program move as close as you can in front. Unlock the padlock. Move the program a few minutes forward. Relock the padlock. Check Dashboard to see if you got what your want? Repeat until you do. Then move program back to closest time possible. Wait for verification that movement was received by VR between every action. 

You can do the same thing when programming tacks and gybes. Just unlock the padlock, move the time a bit, relock, check. When you get the precisely desired TWA move the time of the maneuver back to when you want it executed.  

 

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Le 11/06/2019 à 11:35, Le Couillon a dit :

C'est quoi l’intérêt d'etre a twa 0 ?

Je suis souvent en .0 juste pour la beauté du geste, mais dans la plupart des cas ce n'est pas très utile, ce que tu chipotes en vitesse tu le perds en pouillème de cap, et réciproquement.
Par contre j'y suis plus attentif sur certaines TWA extrêmes, genre au 40 ou 150 par exemple en IMOCA, ou à proximité de la VMG maxi : la perte de centièmes de vitesse peut être plus importante à 39.9 que le gain à 40.1 (je n'ai pas vérifié les données exactes, je n'ai pas les données en tête, c'est juste pour illustrer).

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5 hours ago, BooBill said:

There is a better method to get an exactly desired TWA.

First, Why?  If you look at the polar charts, there are peaks and valleys. You never want to sail at an angle that is in a valley, usually when you are in between two sails. Just like real sailing. Conversely, if there is a peak (like at max boat speed angle), then you definitely want to be exactly on that number. Being 0.2 off doesn't sound like much, but if you are ever wondering how the top sailors will slowly pull away from you, that's why.

The method involves using a programmation point.  First set your boat as close as you can to the desired TWA. Check Dashboard and see what your TWA is to the 0.1 degrees. If it's not precise, set a program move as close as you can in front. Unlock the padlock. Move the program a few minutes forward. Relock the padlock. Check Dashboard to see if you got what your want? Repeat until you do. Then move program back to closest time possible. Wait for verification that movement was received by VR between every action. 

You can do the same thing when programming tacks and gybes. Just unlock the padlock, move the time a bit, relock, check. When you get the precisely desired TWA move the time of the maneuver back to when you want it executed.  

 

Many thanks! Hopefully, it works. Have a nice day

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  • 4 weeks later...
Le 24/06/2020 à 18:18, nazebrock a dit :

Tu te met à la Twa choisie. Tu regarde ton dashboard pour voir si tu est en dessous  ou au dessus de la valeur choisie. Si tu es au dessus .,tu ouvres ton cadenas pendant 1 mn ou 2 en fonction de l angle a rattraper et tu refermer le cadenas et tu attends de voir au bout de 5mn le rafraîchissement du dasboard et ainsi de suite jusqu a arriver à twa xxx.00

 

Merci 

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  • 2 weeks later...

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