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| Auteur | Message |
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Breitling
Age : 43
Inscrit le : 08 Nov 2007
Messages : 40
Localisation : Galicia
 |  Sujet: About courses  Ven 23 Nov - 17:59 | |
| A simple question: OV courses are magnetic or true courses?
Thanks. |
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Fomalhaut
Inscrit le : 09 Nov 2007
Messages : 225
Localisation : Ales
| | Sujet: Re: About courses Ven 23 Nov - 18:25 | |
| Normaly true curse.
Skippy asked if somebody want he stop sometimes ! |
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Breitling
Age : 43
Inscrit le : 08 Nov 2007
Messages : 40
Localisation : Galicia
| | Sujet: Re: About courses Ven 23 Nov - 19:46 | |
| Thanks Fomalhaut..
Regarding Skippy stuff: no, not for me. I've been reading (Google translating) the other thread. As long as it is impossible to do that deliberately, let's assume it is a system bug. So he is a lucky man !! 
But better if he does not try to repeat the event !! 
Cheers. Luis on Breitling. |
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Fomalhaut
Inscrit le : 09 Nov 2007
Messages : 225
Localisation : Ales
| | Sujet: Re: About courses Ven 23 Nov - 20:34 | |
| I think so, maybe it was a software bug, and on the distance to go, it's not really a problem.
At soon, good wind. |
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skippy
Inscrit le : 01 Aoû 2007
Messages : 31
| | Sujet: Re: About courses Ven 23 Nov - 22:14 | |
| | Breitling a écrit: | Thanks Fomalhaut..
Regarding Skippy stuff: no, not for me. I've been reading (Google translating) the other thread. As long as it is impossible to do that deliberately, let's assume it is a system bug. So he is a lucky man !!
But better if he does not try to repeat the event !!
Cheers. Luis on Breitling. |
Hello Luis,
Sorry for the incident unintentional and thanks to be flexible with me.
Good winds,
Harry |
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HU
Inscrit le : 22 Aoû 2007
Messages : 11
| | Sujet: About courses Mer 19 Déc - 19:50 | |
| Hallo,
I've got some problem. I checked loxo and ortho course from New Zeland to Cap Horn and it is: Loxo 126deg, Ortho 19deg witch is impossible. 
I checked the same thing when I was logout and then it is Loxo 113deg, Ortho 149deg witch looks ok. But now what to do? Check out please if you have the same problem.
Rybak |
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Fomalhaut
Inscrit le : 09 Nov 2007
Messages : 225
Localisation : Ales
| | Sujet: Re: About courses Mer 19 Déc - 20:47 | |
| | HU a écrit: | Hallo,
I've got some problem. I checked loxo and ortho course from New Zeland to Cap Horn and it is: Loxo 126deg, Ortho 19deg witch is impossible.
I checked the same thing when I was logout and then it is Loxo 113deg, Ortho 149deg witch looks ok. But now what to do? Check out please if you have the same problem.
Rybak |
Hi, HU (Rybak)
Yes, it's the problem of calculation when the course cross the anti-meridian (180°).
Markers of OV can't go (can't draw) a course from East to West, crossing anti-meridian.
As you can see, the map stop at East, at anti-meridian.
You have to go at West, for recover it.
So, go at West, the more you can, at NZ latitude with red marker.
Go to Cape Horn with green marker.
Calculation will be good without no big error..
I done the calculation by another way (Orthodromic calculation with Spheric trigonometry) : from Drake canal to WP8 (Horn)
ortho: 148° 12' and Loxo: 112° around. Distance : 4176 NM.
Have good night  |
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Breitling
Age : 43
Inscrit le : 08 Nov 2007
Messages : 40
Localisation : Galicia
| | Sujet: Re: About courses Mer 19 Déc - 20:54 | |
| Mmmm.. the enemy !!
From our present position to Cape Horn, ortho gives me 148º, 4185 nm. I think the problem is concerned to the 180º meridian, maybe the system is not doing the correct math. |
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Fomalhaut
Inscrit le : 09 Nov 2007
Messages : 225
Localisation : Ales
| | Sujet: Re: About courses Mer 19 Déc - 21:02 | |
| Sorry Rybak, The calculation I sent you is good, but Cape Horn is WP10 !!
Don't forget to pass at the door WP8/WP9 ! |
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Fomalhaut
Inscrit le : 09 Nov 2007
Messages : 225
Localisation : Ales
| | Sujet: Re: About courses Mer 19 Déc - 21:03 | |
| | Yes Breitling, it's the problem of anti-meridian (180°). |
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HU
Inscrit le : 22 Aoû 2007
Messages : 11
| | Sujet: Re: About courses Mer 19 Déc - 21:08 | |
| Thanks Fomalhaut,
I was making the calculation just like you said moving the map when I saw the problem  
But I found out that this error appears only on zoom 1. On zoom 2 everything is ok. 
Anyway thaks again,
Good winds
Rybak |
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Breitling
Age : 43
Inscrit le : 08 Nov 2007
Messages : 40
Localisation : Galicia
| | Sujet: Re: About courses Mer 19 Déc - 21:18 | |
| Just a small view of where we are now:
 |
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