Winning YCC internal regatta and route planning

Let's start with a good news, yesterday Mamma Mia won the YCC internal regatta, despite we had 1 protest and we pay our penality, and the day before, also won the mini-regatta during the regatta training. This put my motivation high, but I know very well that the skippers at the Translemanique will be all much more experienced and skilled than me... I like challenges.

Now I started to prepare the navigation route, using both the maps I have generated (of which a copy is in Mamma Mia) and of course the Garmin-Navionics application. 

That is the shortest linear geometrical route I can design on the lake to approach the mark position, ( I took the position form the Translemanique gps track of 2018, and average where boats where turning. It is 34.7 Nautical miles.

Some boats used a different strategy in 2018 and went up to gland, to than have a direct route to the mark, I m impressed they managed to do 20 miles without a single tack/gybe! However, this path is 36 miles longs. 

Depending on the wind, the track could be completely different, so on the Gran-Lac could be necessary to do multiple tack or gybe. However it is interesting to have on the GPS the best geometrical route, such that I can plan to stay as close as possible to it. It is also true, that having a bit more room from the coast, will allow to have probably more maneuverability. 

Approximate Minimal total distance = 70 Nautical Miles  and expected time on different average speeds:

2knots = 35h00m  Minimum race avg speed 2.3knots to complete the race*

3knots = 23h20m

4knots = 17h30m

5knots = 14h00m

6knots=  11h40m     Above this speed is planing! Surprise hull speed is 6.24knots!**

7knots=  10h00m  

*Minimum avg speed has to be 2.3knots, closing of the line start at 09:20, closing at 16h of sunday, so max 30.5 hours.
** Displacement Hull speed calculated as 2.43(sqrt(lwl of 6.6m)). 

Best results of Surprises class last editions (1st classified) Previous editions are to Lutry only.

2018 11h22m result - WOW  CER1 Sophies Nelson Mettraux, 6.25knots average that is almost the maximum displacement hull speed of the surprise!
2017 16h55m  Luna Surprise
2016 16h55m  GVA Areoport
2015 29h21m Luc Forum EPFL



Interesting the need to install a  GPS-Conversion application that allowed me to easily convert from the Google-Earth coordinate systems, Degrees,Minutes, Seconds, fraction of seconds,  into the Garmin Navionics Degrees, Minutes, CentsOfMinutes. 
I think both applications  uses a WGS84 projection.