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General Discussion » Optimal Routing Error » Yesterday 9:28 pm

Nick
Replies: 7

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It turned out that the issue was having 'Use port and starboard asymmetric polars' and Exp was just giving a generic error message.

I will add a warning if the polars aren't loaded/available.

Technical Q&A » Crash when I try to upload weather files from Great Circle » Yesterday 2:30 pm

Nick
Replies: 15

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You might be running into the 32 bit memory limits. C-Map seems to reach this before Expedition and may not fail nicely.

This seems to be mostly a problem with Tidetech grib files, which can be very large. Be judicious about how many of those you load.

General Discussion » Optimal Routing Error » Yesterday 3:02 am

Nick
Replies: 7

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Maybe email me the exact details of what you are doing, with screen images.

Technical Q&A » Grid routes - avoid land » 7/30/2021 9:19 pm

Nick
Replies: 7

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Yes, seeing EB's data, the grid routing couldn’t get out of the Solent with default settings.
 
The PW model and data are low resolution and the grid routing works on a grid that is based on the data resolution which is ½ degree in this case. For comparison, GFS, UM, ICON, GDPS Arpege, WRF etc are available at 0.08 – 0.15 degrees.
 
So with the start point on the RYS line behind the Isle of Wight and the next set of points outside the Solent, the router can’t see a path that doesn’t cross land.
 
As Campbell says, you can set a custom resolution that would help/resolve this.
 
I almost always have Expedition set to show the paths. It can be very helpful in showing what the solution means and in this case immediately shows what the issue was.
 
The grid routing was originally designed for routing studies where we wanted to compare the same thing many times and it is faster.
 
Generally the isochronal routing will be a little better especially in light airs and with currents, but is slower.

Similarly, the high resolution avoid land option is better, but noticeably slower.

I think most people will/should generally use the iso routing and occasionally have the grid routing for a comparison.
 
One thing we have been finding very useful recently is to use the TG (Tack/gybe) option with isochronal routing.
 

Technical Q&A » Grid routes - avoid land » 7/29/2021 7:21 pm

Nick
Replies: 7

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Hello,

You could email me the route and race notes and I could test. Am on vacation this week, so replies are slower than normal. Putting 3 marks roughly as you have done works for me though.

For a route like that, I would normally add a mark outside the Solent though and make sure you have Fastnet Rock to be set to sail to rather than leave to port.

The PW GFS option was deleted as the data encoding has too many errors and will not mix nicely with other data. I never use it, so hadn't tested it until someone asked about it a few weeks ago. GFS from Expedition, Saildocs and Squid are all better options anyway. The other PW options are still there, but will never be nearly as good as WRF, Arome etc.

The Iscochronal option should yield a slightly better solution too. We have been using the TG (tack/gybe) routing 
button a lot with it recently.

Btw, the paths option can show you how far and where Exp has explored and managed to get to.

Technical Q&A » Grid routes - avoid land » 7/29/2021 1:04 pm

Nick
Replies: 7

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You can look at the Simple world chart to see what its land to avoid looks like - this is the default option. There is also a higher resolution simple world chart that can be used, but is a little slower.

I suspect the UM model might be best for Fastnet this year and Arome and WRF will come into play closer to the race.

Technical Q&A » Stripchart not showing avarage when operating in true mode » 7/27/2021 2:14 pm

Nick
Replies: 1

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Hello,
I am on vacation this week, remind me to look at if after

Technical Q&A » Number boxes, Polar calculation boxes » 7/25/2021 10:30 pm

Nick
Replies: 7

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There isn't an option to 'reset the Window registry'.

To delete all the Expedition settings in the registry for example, just select the 'Delete Expedition registry keys' option.

The 'Delete all ...' option deletes all Expedition settings from the registry (Stripchart etc)

The settings in the .reg file can be imported by double-clicking on it.

 

Networking Issues » connect to Zeus 3? » 7/24/2021 8:15 pm

Nick
Replies: 5

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Does the Zeus not have Wifi?

Technical Q&A » Crashing when updating Yellowbrick » 7/23/2021 2:43 pm

Nick
Replies: 1

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Is it ok if you don't 'input the handicaps for the boats in my section'?

Maybe mail me the race tracking xml file and also the YB link for the Bayview race.

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