The information we need
In order to benefit from our advanced sailing features, we need your vessels Polar data. A polar diagram describes how fast a sailing boat may go at different wind speeds (TWS) and in different angles to the wind (TWA). Every type of boat has its polar diagram (or VPP, velocity prediction program), computed from hull shape, weight, rigging, and a sail setup. Raymarine uses this polar information to calculate the fastest choice of path for the current wind speed and direction.
For inclusion in LightHouse 4 we need the polar to be provided in text format (.txt) as per this example data sheet
. Please note that we can not accept polar diagrams, pdf’s or photos. Your submission has to be editable text.
Polar data can be sourced from many locations; the boat manufacturer (which is our preferred source), a class association or members forum, a rating certificate, or put together by the owner if a very old hull design or a one-off boat.
It’s also essential to capture as much information as possible about the polar data provided and the vessel it relates too, that is the reason for the form. For example, two polars for the same boat can be very different depending on whether one included the use of a spinnaker and the other doesn’t. The same goes for short and deep draft keels and racing or cruising mast configurations. We need to capture this information with the polar submission.