Start Line Data
Start line data provides the line visualization and shows the line length and the bias. The wind direction set is the one suggested by the app for the first few minutes of sailing.
The other fields are as follows:
Line Dist at Gun – distance to line at the gun, negative values mean over the line
Line Time – the time when line was crossed. Negative values mean crossing too early
Pos at Start – place at the line, 0% is full at RC side, 100% is Pin side
Bias Used – The amount of bias used when crossing the line. If you start at the favored end, you use max available bias
DT Lead at gun at 1:00 – upwind distance to the leading boat at the gun and after a minute of racing
SOG at the gun – speed over ground at the gun
Data Fields
Data fields always show the average numbers for the selected period. All the wind-related values are calculated based on the fixed wind direction set for that period. Somewhere in the reports, these numbers only show filtered straight-line sailing with maneuvers and mark rounding removed. If it is like that, it is always written below the image. Also, data fields are usually sorted by time, so the best-performing boat on the leg is the first on the list.
Time – sailed time
Dist – sailed distance.
Updist – upwind distance sailed.
SOG – speed over ground
Mans – maneuvers and cumulative loss in all of them (losses are in upwind meters)
ATW – angle to the set wind direction. In shifty wind, it usually shows who has sailed better shifts. In stable conditions, it shows the difference in the boat’s performances.
VMG – VMG to the wind set
Heel – Heel of the boat (L – leeward, W – windward)
Heel TR – the amount of movement of the heel in degrees per minute. A higher number means that the boat was more unstable. This number can only be compared between the same logging devices and same logging frequencies.
GPS Tracks
Colored GPS track colors the best 10% of sailing in the brightest green and the worst in the brightest red. All the green shades are better than 50% of the time sailed, and red is worse than that. The path is colored by the VMG to the set wind direction. Sometimes, when needed, it will be colored based on some other value, and it will be mentioned below the image.
The race geometry shows the angle of the upwind mark in relation to the wind. In this example, the mark is 11 degrees off and it results in 1.6 times more sailing on port tack. Laylines are also drawn based on the typical angle of the boats on that leg.
Polar Graph
The polar Graph shows all the points of the selected period for all the boats. The wind always comes from the top. Each point is drawn at the angle and speed the boat had at that moment. The further from the center, the higher the speed. The example above shows top speed on downwind at around 13 knots of speed (bottom left). The VMG and performance is better the higher up the screen the dots are on the upwind and the lower they are on the downwind.
Graph Screen
Graph screen most of the time shows one of these values:
TTL – time to leader in seconds. Shows how much earlier the leading boat was at that point of the leg.
DTL – distance to the leader in meters.
SWD – Suggested Wind direction. The app goes through the race and for every time interval it tries to set the wind direction based on the tracks of the boats. The more boats racing, the more reliable the value is.
Dashed vertical lines are the mark roundings. Solid vertical lines are maneuvers (not shown below since there are too many so they are hidden)
Race Stats Screen
GIF animations
Very useful for a quick reminder about the leg.
Some key points are also shown. Horizontal lines help to see gains and losses.
