Apparent wind tack zone = Tack zone - 12 degrees.
Apparent wind tack zone = Tack zone - 12 degrees.

SteffenGrundmann/avalonsailing,denidoank/avalonsailing,SteffenGrundmann/avalonsailing,denidoank/avalonsailing,SteffenGrundmann/avalonsailing,denidoank/avalonsailing,denidoank/avalonsailing,denidoank/avalonsailing,denidoank/avalonsailing,SteffenGrundmann/avalonsailing,SteffenGrundmann/avalonsailing,SteffenGrundmann/avalonsailing