It happens sometimes. You click the “change course” button and directly after, you see you made an error. You forgot to check the “delay” box, entered a wrong number or entered a TWA in the COG box. If you’re quick you might still be able to keep the command from executing, and continue without performance loss.
All posts by kroppyer
Sailonline Performance Calculator
The calculations in sailonline’s performance loss system are a bit complicated. Sometimes it’s really handy to know how much you will lose as the result of some manoeuvre. This is why I made the Sailonline Performance Calculator.
Exploring SPINNACER 1.1
SPINNACER (SOL Polar Inspector, Nautical Navigator And Calculator to Enhance Racing) is a java program that should help its users understand the polars (as used by sailonline.org) better, and performing (more accurate) calculations, e.g. for setting DCs. The “NN” part in SPINNACER is still in development, polar inspector and calculator are available 
Welcome!
Welcome to solfans!
We have been preparing for this for a while now, and we’re finally ready to share stories and knowledge from and for the sailonline community
Introduction to QtVLM
You probably know a little about what routers do, but you’re not very familiar with how to operate one, or how to operate QtVLM in specific. I will explain the most important controls, and describe how you can do a basic routing. I assume you have already installed QtVLM.
Around Principe — never right
A race report on race #721 – Around Principe 2014
There is not much to say about tactics and decisions in this four hour sprint. There was an option for a split twice, east and west of Principe.
Wisdom of the Crowd
A race report on race #691 – Tokyo to San Francisco 2014
I started of as if it were a practice race, but soon we reached open ocean and I had no idea what to do. Luckily there were lots of boats around me who knew. I checked the wx slider and decided that the boats going south were probably right. I followed them. Every evening I tried to predict what the boats around me would do, and set DCs to keep me in the group. I wasn’t always right (example, I tacked about 2 hours too soon, thinking the winds were turning more than they actually did), and often ended up a bit too far north or south. I lost some hours to the leader in this process.
