Update has rolled back?
Post by iconPost by MidnightFoiler | 2020-08-16 | 04:43:53

Seeing 00z +27h and I think it had gone to full 00z update...

commenticon 7 Comments
Post by iconPost by BooBill | 2020-08-16 | 10:36:21
I'm getting something weird going on as well. Right after the first updates for the 06z started downloading I was getting something reasonable and the projected path in VR matched. Now nearly an hour later it's at 06Z+39 and wants me to basically swing NW with negative VMG.
Post by iconPost by BooBill | 2020-08-16 | 17:47:08
And again at the 12z update. Telling you to sail straight west, lol.

Several of the lead pack actually did it.
Post by iconPost by BooBill | 2020-08-17 | 00:14:19
Didn't want to leave it where it may appear that I was suggesting there might be a bug in the optimizer. After much analysis, manual calculation and running an alternate router, my conclusion is that the optimizer was running correctly.

Using the same GFS data, that was the right route (slightly). Still leaves the possibility that the data was bad. Fastseas router, which is much more simplistic with 1 hour time steps, and also using GFS came up with something much more normal looking and close to what the current leaders were sailing.

There was significant differences in ECMWF, GFS and ICON forecasts, so sailing negative VMG based on GFS alone, not going to happen on my boat.

We'll see at the finish line. Some big names took a 40 mile hit.
Post by iconPost by MidnightFoiler | 2020-08-17 | 03:48:47
Yep, it was wacky "last night". You positioned yourself well for it.


Post by iconPost by BooBill | 2020-08-17 | 04:10:54
At least we had the luxury of time, this happening on a Sunday morning, to spend hours figuring out what was going on.

Or, maybe the trick was to sleep through it and just continue your course.
Post by iconPost by MidnightFoiler | 2020-08-17 | 03:50:25
Following up on the original issue. I noticed the red line went back to +6hr at the next update too BUT the routing beyond the red line seemed correct for the updated forecast.

Post by iconPost by MidnightFoiler | 2020-08-17 | 06:38:02
It was the middle of the night for me!
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