Post by iconPost by zezo | 2013-12-08 | 19:55:56

Somebody asked and it seems that the original announcement was lost in the database crash a while ago.

commenticon 14 Comments
Post by iconPost by zezo | 2013-12-08 | 19:56:05
The track tool can be turned on/off via the toolbar button next to the zoom control

The tool plots three lines.

The red one is orthodromy to the cursor. Heading may change an may not be possible to do it in the game because of the fractional angles.

The blue one is loxodrome - course at constant heading.

The Green one is a plot wit fixed TWA (wind angle)

The colors of the numbers in the information box correspond to the colors of the lines.

There are dots/circles on the lines which correspond to the isochrone lines on the chart. Ideally you use the tool to find sailing angle which gives result no worse than the router itself.

The squares mean a sail change. They may not be 100% accurate, but will help you identify possible problems with the interpolated winds.

How to use it:

- It's often possible to reach the same point in few different ways - either fixed TWA or a straight line. You can choose the more convenient or see how much you will lose by not waking up at 4AM ;-)

- You can check for dips in the polar diagrams at sail crossover points. If the circles lie on the isochrone for certain range, say 45-90 degree but fall behind between 60 and 70 that usually means that it's faster to spend some time at 60 and some at 70 than sail at 65 all the time.
Post by iconPost by demirose | 2015-10-29 | 23:36:35
Thank you so much! That really helps!!
Post by iconPost by tabasco2 | 2018-01-08 | 16:03:11
Zezo, someone is writing on the water, right in front of your boat. Hahaha

Post by iconPost by zezo | 2018-01-08 | 16:16:42
Neat ;-) Came home just in time to see it ;-)
Post by iconPost by HollandPirates | 2018-01-08 | 16:44:37

Post by iconPost by Peppe | 2018-01-08 | 20:49:10
:) somebody has more spare time than i have... :p
Post by iconPost by Trailaspress | 2018-01-08 | 22:28:06
Post by iconPost by WoKeN | 2018-01-09 | 17:03:41
Post by iconPost by nsp | 2018-01-10 | 13:44:53
Post by iconPost by PML | 2018-01-09 | 12:58:22
H Cvetan,
Many thanks for this very useful tool!
If the red line is orthodromy to the cursor, why is it not meeting the blue line at the cursor?
Post by iconPost by zezo | 2018-01-09 | 13:03:39
This a 5-year old thread. I've probably swapped the colors at some later moment.

The orthodrome is the blue line to the cursor.

Red line is loxodrome in the initial direction of the blue line.

Compare against the orange line which is a great circle/loxodrome itself.
Post by iconPost by UR2L8 | 2018-01-09 | 13:06:49
Hey, maybe you can update Q&A with this information?
Post by iconPost by zezo | 2018-01-10 | 18:08:31
Yep. The entire Q&A is about 7 years and 3 game editions out of date.
Post by iconPost by PML | 2018-01-09 | 13:32:34
Understood. Thanks for the swift response.
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