MaxSea Operator Manual version 12.6 - Furuno USA

According to the Wind speed :
Performance
Wind speed pop-up menu allows you to swap between a manual display (where the wind force value is specified by the
user) and an automated display of the polar, taking account of wind force measurements the running polar is selected by
default.
• When the running polar is active, the program displays and regularly updates the polar in accordance with the
wind speed measured (the running polar). The speed value is displayed in the upper left corner of the polar
graph written in blue (third part of the window).
• When the running is not selected the software displays the polar which corresponds to the wind speed as
defined by the user.
According to the Graph range :
Allows you to choose a range for the axis of the polar graph display. The variable option is selected by default. This option
allows to change the range of the polar graph.
The “All polar” check box when it’s selected all polar from the file are displayed on the graph.
The “Draw calcul” check box when it’s selected displays the actual position (red cross) of the boat on the graph and the
vector projections on theVMG axis and the VMC axis.
The “drawn limit sectors” check box to allow the drawn limit sectors on the polar graph.
Third part of the polar window corresponds to the polar graph and the following informations are displayed
:
• Respectively, in the upper and lower right-hand corners of the window, the VMG when heading into the wind closehauled
and when heading downwind.
• In the upper right corner of the polar window graph, the optimum tack angle (close-hauled), together with its
corresponding speed.
• In the lower right corner of the polar window graph the optimum reach angle (heading downwind), together with its
corresponding speed.
• In the upper left corner the Wind speed value is displayed.
• Where relevant, the values of the sector limit between the fore sail and the spinnaker, together with their corresponding
speeds (drawn in yellow).
• The boat’s location on the current polar is shown by a cross which serves to give an immediate idea of the boat’s
efficiency (when the cross is situated inside the polar efficiency is inferior to 100%, when the cross is on the polar itself
efficiency is equal to 100% and when the cross is outside the polar efficiency is greater than 100%) and the wind bearing
(too strong at the near windward, too casting before the wind, within the prohibited sector between before sails and
spinnaker).
• By moving the cursor on one of the points of the polar the following information may be obtained theoretic speed of the
boat with the actual wind bearing indicated.
Note: it is possible, by moving continuously along the polar curve, to run through different bearings on the polar.
415