Something about sailing....why are we at sea ?
Cool water activities, Home waters and the Oceans:
Ocean crew link, looking for adventure
Software for sailing
Navigation, OpenCPN is my favorite, it's a chartpotter, astronavigator and a range of nice features, open source and free.
Openplotter, yacht computer etc, all Rasberry Pi based.
Weather, it's important to know the weather at sea.
zyGrib is widely used and higly appreciated.
Greek GRIB files for the Med and Adriatic.
yr.no GRIB files, northern waters.
These little pictures illustrate how the turbulence from a
sail or wing extend over a long range. Everybody knows
that wind is always better than "used" wind, but few of us
think how long the turbulent used wind extend. It's far
more than just a few boat lengths.
Turbulence is still one of the hard problems in aerodynamics. These pictures nicely illustrate the concept of "used" wind.
Look at the Electronic corner (Elektronikkhjørnet) for some simple but useful tips and hints about the simple but often overlooked facts. An example is coax for VHF.
Ship computer and the project of using only computers and no instruments (or as few as possible) will be posted. Plans are to use a Rasberry Pi as main computer
and Arduino as peripheral processor (mostly due to the fact the the Pi do not have analog inputs and is not a real time computer).
Things to be afraid of
Freak waves/rouge waves,
not common but mave the potential to sink any ship. Watch the video to the right. These waves was rejected or dismissed as sailors stories by science for many years, until the Draupner oil rig recorded one in 1995.
Online boatshow (for those long winter months).