Name: Windsurf Slalom
Author: AlexOlaf

Designed specially for windsurfing/foiling/wing slalom or course racing and practicing. 
Timer view provide a standart Start timer functionality like
- countdown loopable timer
- start and pause timer left middle button
- reset time (sets back to default minutes from setup)  left bottom button
- sync timer (zero seconds)  right upper button
Also provide a prediction on start line crossing (check the Pins menu). If you saved 2 or more pins of start line and started a timer, then at 30 seconds (by default, can change it in settings) the prediction timer start. The app automatically calculate closest distance to the start line defined by 2 nearest pins, takes your current speed and shows predicted time to start line, disrepance to the timer and a hint on should you speed up or slowdown. 
If timer started in no loop mode (usually for racing mode) 5 seconds after timer zero appwill switch to practice view automatically if your current speed is high enough (set it in setup menu, 30km/h by default). 

Practice view shows 
- current speed
- session distance travelled
- current heart rate
- current time
- maximum 2seconds average for a previous tack speed. Tacks are detected automatically.
Up/down buttons to step through tacks history and right upper to get back to current tack.
If timer started and you were switched to practice automatically and speed is low (set it in setup menu, 10km/h by default) app switches back to timer. This allow you get back to the flag boat to start next race, or check the time on a course if you fall :)
Arrows are for entertaining and debugging purposes only, shows current heading and average heading. I use it to control tack detection. 

To use start line prediction save the up and down mark(or pins as you call it) of start line using Save pin in Pins menu. Automatic filtering is happend and only pins more than 10 meters apart will be added. So it shows overall/filtered pins added. Only 2 nearest pins wil be chosen as start line.

Setup menu for speed/distance units (km/h, knots, kilometers and sea miles), color theme (black/white), timer program (from 1 up 12 minutes countdown), looping timer (usefull for training sessions), timer and tracker (practice view) threshold speeds, timer prediction interval (seconds to start to prediction info appear)

GPS status shows current gps quality and accurance. 

Gear menu let you set you gear used for the session, wind and your impressions like how much powered you were and ride comfort. 

Activity recording is started at application start automatically and saved on exit. 
Finaly the summary for the session shown.