MaxSea Operator Manual version 12.6 - Furuno USA

Performance
Lay-lines are displayed with based upon the ship’s protracted heading, and the values as indicated by the loaded polar.
• True wind - Heading
This mode does not take into account the theoretic information contained in the speed polar but instead uses actual
measured true wind direction values and the ship’s effective heading. This mode should be used when abnormal sea
conditions are being experienced.
Notes:
• Laylines are constantly modified as the wind changes.
Lay-lines are then displayed in color from:
Previous Waypoint ,
Next Waypoint,
Ship.
• once active, the function [Display laylines], under the [Performance] menu, is replaced by the function Erase
lay-lines.
• laylines are displayed with respect to the active waypoint (i.e. that to which the ship is headed), thus the function
is only available if a course has been captured.
• the program automatically displays near or tail wind laylines in accordance with the current true wind (near wind
for actual wind bearings of less than 90°, tail wind for real wind bearings greater than 90°).
IMPORTANT
The following data is needed for the laylines calculation:
• One of the following : Course over ground or True heading or Magnetic heading
• Speed over ground
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