Category Archives: Sailonline.org technical stuff

About things like mark roundings, performance loss and DC setting techniques. About anything that’s only on sailonline.org

Automatic Grib Downloader and DC Editor

Ever sat there waiting for the grib to arrive? Want the grib on your computer ready to use? I’ve written a Java utility that will monitor the SOL server and automatically download the grib file for you when it arrives. It’s been enhanced to include a DC editor and now has a graphical interface. Continue reading 'Automatic Grib Downloader and DC Editor'

Around the Bend on the Bay of Biscay

WindContoursAtStart
The course — with winds at starting time

At first glance, this race looked to be a simple reach up the coast.  At least that is how it would be if the initial winds held.

Yes, there was an island to deal with near the finish.  But odds were we would leave the island to starboard — problem solved.  This race seemed to be routine.

But as the ‘Mad Russian‘ character from Jack Benny’s radio show would have said, “Silly Boy!” The race was far from routine.

Continue reading 'Around the Bend on the Bay of Biscay'

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 :)

Continue reading 'Exploring SPINNACER 1.1'